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Loans and Allowance for Credit Losses - Schedule of Activity in Troubled Debt Restructurings (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Roll Forward] |  |
Beginning Balance | $ 32,653 | $ 31,738
(Charge-offs)/ Recoveries | 15 | (1,961)
(Payments)/ Disbursements | (1,931) | (1,103)
(Removals)/ Additions | (1,171) | 0
Ending Balance | 29,566 | 28,674
Commercial |  |
Financing Receivable, Troubled Debt Restructuring [Roll Forward] |  |
Beginning Balance | 11,090 | 12,412
(Charge-offs)/ Recoveries | 0 | (695)
(Payments)/ Disbursements | (1,448) | (789)
(Removals)/ Additions | (1,171) | 0
Ending Balance | 8,471 | 10,928
Commercial real estate |  |
Financing Receivable, Troubled Debt Restructuring [Roll Forward] |  |
Beginning Balance | 17,606 | 14,277
(Charge-offs)/ Recoveries | 8 | (1,272)
(Payments)/ Disbursements | (229) | (157)
(Removals)/ Additions | 0 | 0
Ending Balance | 17,385 | 12,848
BBCC |  |
Financing Receivable, Troubled Debt Restructuring [Roll Forward] |  |
Beginning Balance | 112 | 578
(Charge-offs)/ Recoveries | 3 | 0
(Payments)/ Disbursements | (10) | (16)
(Removals)/ Additions | 0 | 0
Ending Balance | 105 | 562
Residential real estate |  |
Financing Receivable, Troubled Debt Restructuring [Roll Forward] |  |
Beginning Balance | 2,824 | 3,107
(Charge-offs)/ Recoveries | 0 | 0
(Payments)/ Disbursements | (221) | (67)
(Removals)/ Additions | 0 | 0
Ending Balance | 2,603 | 3,040
Indirect |  |
Financing Receivable, Troubled Debt Restructuring [Roll Forward] |  |
Beginning Balance | 0 | 0
(Charge-offs)/ Recoveries | 2 | 3
(Payments)/ Disbursements | (2) | (3)
(Removals)/ Additions | 0 | 0
Ending Balance | 0 | 0
Direct |  |
Financing Receivable, Troubled Debt Restructuring [Roll Forward] |  |
Beginning Balance | 739 | 983
(Charge-offs)/ Recoveries | 1 | 2
(Payments)/ Disbursements | (14) | (63)
(Removals)/ Additions | 0 | 0
Ending Balance | 726 | 922
Home equity |  |
Financing Receivable, Troubled Debt Restructuring [Roll Forward] |  |
Beginning Balance | 282 | 381
(Charge-offs)/ Recoveries | 1 | 1
(Payments)/ Disbursements | (7) | (8)
(Removals)/ Additions | 0 | 0
Ending Balance | $ 276 | $ 374

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- Definition Amount of new troubled debt restructurings during the period. + References No definition available. + Details
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- Definition Amount of financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554 + Details
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