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 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Financing Receivable, Impaired [Line Items]          
Recorded Investment $ 30,337   $ 30,337   $ 27,183
Unpaid Principal Balance 33,502   33,502   29,623
With No Related Allowance Recorded 16,820   16,820   14,225
With an Allowance Recorded 13,517   13,517   12,958
Related Allowance 4,822   4,822   5,878
Average Recorded Investment 30,703 $ 29,562 29,234 $ 29,850  
Interest Income Recognized 475 476 1,224 1,320  
Real estate loans [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 20,596   20,596   18,663
Unpaid Principal Balance 23,319   23,319   20,701
With No Related Allowance Recorded 14,199   14,199   11,783
With an Allowance Recorded 6,397   6,397   6,880
Related Allowance 2,428   2,428   2,093
Average Recorded Investment 20,442 20,246 19,865 20,297  
Interest Income Recognized 407 395 1,027 1,082  
Real estate loans [Member] | Commercial property loans [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 18,761   18,761   16,100
Unpaid Principal Balance 21,351   21,351   17,973
With No Related Allowance Recorded 12,364   12,364   10,959
With an Allowance Recorded 6,397   6,397   5,141
Related Allowance 2,428   2,428   2,072
Average Recorded Investment 18,476 17,452 17,596 17,500  
Interest Income Recognized 384 369 947 995  
Real estate loans [Member] | Retail [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 3,108   3,108   1,403
Unpaid Principal Balance 3,621   3,621   1,423
With No Related Allowance Recorded 2,772   2,772   1,246
With an Allowance Recorded 336   336   157
Related Allowance 54   54   1
Average Recorded Investment 2,671 1,487 1,936 1,551  
Interest Income Recognized 93 24 141 85  
Real estate loans [Member] | Hospitality [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 6,860   6,860   6,184
Unpaid Principal Balance 8,208   8,208   7,220
With No Related Allowance Recorded 2,441   2,441   2,144
With an Allowance Recorded 4,419   4,419   4,040
Related Allowance 2,284   2,284   1,677
Average Recorded Investment 7,146 6,476 7,639 6,268  
Interest Income Recognized 104 143 376 309  
Real estate loans [Member] | Other [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 8,793   8,793   8,513
Unpaid Principal Balance 9,522   9,522   9,330
With No Related Allowance Recorded 7,151   7,151   7,569
With an Allowance Recorded 1,642   1,642   944
Related Allowance 90   90   394
Average Recorded Investment 8,659 9,489 8,021 9,681  
Interest Income Recognized 187 202 430 601  
Real estate loans [Member] | Residential property [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 1,835   1,835   2,563
Unpaid Principal Balance 1,968   1,968   2,728
With No Related Allowance Recorded 1,835   1,835   824
With an Allowance Recorded 0   0   1,739
Related Allowance 0   0   21
Average Recorded Investment 1,966 2,794 2,269 2,797  
Interest Income Recognized 23 26 80 87  
Commercial and industrial loans [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 3,767   3,767   3,039
Unpaid Principal Balance 3,928   3,928   3,081
With No Related Allowance Recorded 765   765   1,068
With an Allowance Recorded 3,002   3,002   1,971
Related Allowance 631   631   441
Average Recorded Investment 3,819 4,555 3,266 4,592  
Interest Income Recognized 40 54 119 181  
Leases Receivable [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 5,093   5,093   4,452
Unpaid Principal Balance 5,138   5,138   4,626
With No Related Allowance Recorded 1,095   1,095   455
With an Allowance Recorded 3,998   3,998   3,997
Related Allowance 1,763   1,763   3,334
Average Recorded Investment 5,424 3,560 5,072 4,044  
Interest Income Recognized 11 12 33 36  
Consumer loans [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 881   881   1,029
Unpaid Principal Balance 1,117   1,117   1,215
With No Related Allowance Recorded 761   761   919
With an Allowance Recorded 120   120   110
Related Allowance 0   0   $ 10
Average Recorded Investment 1,018 1,201 1,031 917  
Interest Income Recognized $ 17 $ 15 $ 45 $ 21