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Allowance for Loan Losses - Summary of Allowance for Loan Losses (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of period | $ 48,106 | $ 46,616 | $ 47,911 | $ 46,255
Charge-offs | (1,755) | (3,746) | (3,205) | (4,721)
Recoveries | 404 | 4,844 | 842 | 5,891
Net (Charge-offs)/ Recoveries | (1,351) | 1,098 | (2,363) | 1,170
Provision for loan losses | 2,059 | (1,134) | 3,266 | (845)
Balance at End of Period | 48,814 | 46,580 | 48,814 | 46,580
Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of period | 19,071 | 19,880 | 20,164 | 18,921
Charge-offs | (310) | (1,737) | (376) | (2,004)
Recoveries | 73 | 1,294 | 176 | 1,834
Net (Charge-offs)/ Recoveries | (237) | (443) | (200) | (170)
Provision for loan losses | 184 | 1,296 | (946) | 1,982
Balance at End of Period | 19,018 | 20,733 | 19,018 | 20,733
Commercial and Industrial [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of period | 13,711 | 13,979 | 13,668 | 14,433
Charge-offs | (992) | (743) | (1,698) | (1,033)
Recoveries | 89 | 2,936 | 203 | 3,249
Net (Charge-offs)/ Recoveries | (903) | 2,193 | (1,495) | 2,216
Provision for loan losses | 500 | (3,168) | 1,135 | (3,645)
Balance at End of Period | 13,308 | 13,004 | 13,308 | 13,004
Construction Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of period | 6,869 | 5,183 | 6,093 | 5,374
Charge-offs |  | (664) |  | (692)
Recoveries | 1 | 324 | 2 | 375
Net (Charge-offs)/ Recoveries | 1 | (340) | 2 | (317)
Provision for loan losses | 801 | (84) | 1,576 | (298)
Balance at End of Period | 7,671 | 4,759 | 7,671 | 4,759
Consumer Real Estate [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of period | 6,723 | 6,408 | 6,333 | 6,362
Charge-offs | (177) | (425) | (552) | (547)
Recoveries | 112 | 164 | 248 | 223
Net (Charge-offs)/ Recoveries | (65) | (261) | (304) | (324)
Provision for loan losses | 369 | 558 | 998 | 667
Balance at End of Period | 7,027 | 6,705 | 7,027 | 6,705
Other Consumer [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of period | 1,732 | 1,166 | 1,653 | 1,165
Charge-offs | (276) | (177) | (579) | (445)
Recoveries | 129 | 126 | 213 | 210
Net (Charge-offs)/ Recoveries | (147) | (51) | (366) | (235)
Provision for loan losses | 205 | 264 | 503 | 449
Balance at End of Period | $ 1,790 | $ 1,379 | $ 1,790 | $ 1,379

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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 + Details
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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Amount, after recoveries, of loans and leases that have been written-off. + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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