Quarterly report pursuant to Section 13 or 15(d)

Organization and Basis of Presentation - Summary of Impact of ASU on Allowance for Credit Losses (Detail)

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Organization and Basis of Presentation - Summary of Impact of ASU on Allowance for Credit Losses (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Jan. 01, 2020
Dec. 31, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable $ 66,500   $ 61,408
ASU 2016-13      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Allowance for credit losses on off-balance sheet items   $ 2,062  
ASU 2016-13 | Pre-ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Allowance for credit losses on off-balance sheet items   2,398  
ASU 2016-13 | Impact of ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Allowance for credit losses on off-balance sheet items   (336)  
Real Estate      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable 38,983   36,355
Real Estate | Retail      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable 6,651   4,911
Real Estate | Hospitality      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable 12,499   6,686
Real Estate | Other      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable 15,664   8,060
Real Estate | Total commercial property loans      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable 34,814   19,657
Real Estate | Construction      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable 2,207   15,003
Real Estate | Residential property      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable 1,962   1,695
Real Estate | ASU 2016-13      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   50,327  
Real Estate | ASU 2016-13 | Pre-ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   36,355  
Real Estate | ASU 2016-13 | Impact of ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   13,972  
Real Estate | ASU 2016-13 | Retail      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   6,785  
Real Estate | ASU 2016-13 | Retail | Pre-ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   4,911  
Real Estate | ASU 2016-13 | Retail | Impact of ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   1,873  
Real Estate | ASU 2016-13 | Hospitality      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   12,387  
Real Estate | ASU 2016-13 | Hospitality | Pre-ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   6,686  
Real Estate | ASU 2016-13 | Hospitality | Impact of ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   5,702  
Real Estate | ASU 2016-13 | Other      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   13,415  
Real Estate | ASU 2016-13 | Other | Pre-ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   8,060  
Real Estate | ASU 2016-13 | Other | Impact of ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   5,355  
Real Estate | ASU 2016-13 | Total commercial property loans      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   32,587  
Real Estate | ASU 2016-13 | Total commercial property loans | Pre-ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   19,657  
Real Estate | ASU 2016-13 | Total commercial property loans | Impact of ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   12,930  
Real Estate | ASU 2016-13 | Construction      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   15,590  
Real Estate | ASU 2016-13 | Construction | Pre-ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   15,003  
Real Estate | ASU 2016-13 | Construction | Impact of ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   587  
Real Estate | ASU 2016-13 | Residential property      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   2,150  
Real Estate | ASU 2016-13 | Residential property | Pre-ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   1,695  
Real Estate | ASU 2016-13 | Residential property | Impact of ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   455  
Commercial and Industrial      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable 11,588   16,206
Commercial and Industrial | ASU 2016-13      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   13,709  
Commercial and Industrial | ASU 2016-13 | Pre-ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   16,206  
Commercial and Industrial | ASU 2016-13 | Impact of ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   (2,497)  
Commercial and Industrial | ASU 2016-13 | Commercial term      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   12,175  
Commercial and Industrial | ASU 2016-13 | Commercial term | Pre-ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   14,077  
Commercial and Industrial | ASU 2016-13 | Commercial term | Impact of ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   (1,903)  
Commercial and Industrial | ASU 2016-13 | Commercial lines of credit      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   1,358  
Commercial and Industrial | ASU 2016-13 | Commercial lines of credit | Pre-ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   1,887  
Commercial and Industrial | ASU 2016-13 | Commercial lines of credit | Impact of ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   (529)  
Commercial and Industrial | ASU 2016-13 | International loans      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   176  
Commercial and Industrial | ASU 2016-13 | International loans | Pre-ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   242  
Commercial and Industrial | ASU 2016-13 | International loans | Impact of ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   (65)  
Leases Receivable      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable 15,780   8,767
Leases Receivable | ASU 2016-13      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   14,669  
Leases Receivable | ASU 2016-13 | Pre-ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   8,767  
Leases Receivable | ASU 2016-13 | Impact of ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   5,902  
Consumer      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable $ 149   $ 80
Consumer | ASU 2016-13      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   135  
Consumer | ASU 2016-13 | Pre-ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   80  
Consumer | ASU 2016-13 | Impact of ASU 2016-13 Adoption      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Total allowance for credit losses on loans receivable   $ 55