Quarterly report pursuant to Section 13 or 15(d)

Loans and Leases - Information on Impaired Loans, Disaggregated by Loan Class (Detail)

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Loans and Leases - Information on Impaired Loans, Disaggregated by Loan Class (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Financing Receivable, Impaired [Line Items]      
Recorded Investment $ 26,449   $ 27,183
Unpaid Principal Balance 29,098   29,623
With No Related Allowance Recorded 17,770   14,225
With an Allowance Recorded 8,680   12,958
Related Allowance 3,016   5,878
Average Recorded Investment 28,502 $ 25,070  
Interest Income Recognized 367 376  
Real estate loans [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded Investment 18,512   18,663
Unpaid Principal Balance 20,753   20,701
With No Related Allowance Recorded 14,597   11,783
With an Allowance Recorded 3,916   6,880
Related Allowance 1,549   2,093
Average Recorded Investment 19,937 20,854  
Interest Income Recognized 303 314  
Real estate loans [Member] | Retail [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded Investment 1,394   1,403
Unpaid Principal Balance 1,417   1,423
With No Related Allowance Recorded 1,336   1,246
With an Allowance Recorded 58   157
Related Allowance 5   1
Average Recorded Investment 1,409 1,667  
Interest Income Recognized 22 31  
Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded Investment 7,413   6,184
Unpaid Principal Balance 8,962   7,220
With No Related Allowance Recorded 3,671   2,144
With an Allowance Recorded 3,742   4,040
Related Allowance 1,543   1,677
Average Recorded Investment 8,105 6,254  
Interest Income Recognized 141 67  
Real estate loans [Member] | Other [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded Investment 7,255   8,513
Unpaid Principal Balance 7,778   9,330
With No Related Allowance Recorded 7,140   7,569
With an Allowance Recorded 116   944
Related Allowance 1   394
Average Recorded Investment 7,843 10,160  
Interest Income Recognized 110 183  
Real estate loans [Member] | Residential property [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded Investment 2,450   2,563
Unpaid Principal Balance 2,596   2,728
With No Related Allowance Recorded 2,450   824
With an Allowance Recorded 0   1,739
Related Allowance 0   21
Average Recorded Investment 2,580 2,773  
Interest Income Recognized 30 33  
Commercial and industrial loans [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded Investment 2,843   3,039
Unpaid Principal Balance 2,934   3,081
With No Related Allowance Recorded 1,344   1,068
With an Allowance Recorded 1,499   1,971
Related Allowance 357   441
Average Recorded Investment 2,914 3,892  
Interest Income Recognized 40 59  
Leases Receivable [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded Investment 4,200   4,452
Unpaid Principal Balance 4,324   4,626
With No Related Allowance Recorded 934   455
With an Allowance Recorded 3,265   3,997
Related Allowance 1,110   3,334
Average Recorded Investment 4,603    
Interest Income Recognized 10    
Consumer loans [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded Investment 894   1,029
Unpaid Principal Balance 1,087   1,215
With No Related Allowance Recorded 895   919
With an Allowance Recorded 0   110
Related Allowance 0   $ 10
Average Recorded Investment 1,048 324  
Interest Income Recognized $ 14 $ 3