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Loans and Allowance for Credit Losses - Activity in the Allowance for Loan Losses, by Portfolio Segment, for the Current Year (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance, beginning of period | $ 238,050 |  |
Balance, end of period | 205,332 | $ 238,050 |
Loans, Excluding Acquired Loans |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance, beginning of period | 238,050 | 68,244 | $ 56,694
Provision for credit loss expense | (31,209) | 82,488 | 43,240
Charge-offs | (26,982) | (70,659) | (36,836)
Recoveries | 12,022 | 6,600 | 5,146
Net charge-offs | (14,960) | (64,059) | (31,690)
Balance, end of period | 205,332 | 238,050 | 68,244
Loans, Excluding Acquired Loans | Other Consumer and Other |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance, beginning of period | 5,617 | 2,169 | 2,419
Provision for credit loss expense | (352) | (6,093) | 2,400
Charge-offs | (2,053) | (4,022) | (5,007)
Recoveries | 1,404 | 1,465 | 2,357
Net charge-offs | (649) | (2,557) | (2,650)
Balance, end of period | 4,617 | 5,617 | 2,169
Loans, Excluding Acquired Loans | Commercial |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance, beginning of period | 42,093 | 22,863 | 20,514
Provision for credit loss expense | (22,031) | 42,017 | 24,434
Charge-offs | (10,613) | (48,736) | (23,352)
Recoveries | 4,660 | 3,216 | 1,267
Net charge-offs | (5,953) | (45,520) | (22,085)
Balance, end of period | 17,458 | 42,093 | 22,863
Loans, Excluding Acquired Loans | Real Estate |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance, beginning of period | 182,868 | 39,161 | 29,838
Provision for credit loss expense | (7,918) | 42,276 | 12,714
Charge-offs | (10,691) | (13,788) | (3,892)
Recoveries | 4,910 | 905 | 501
Net charge-offs | (5,781) | (12,883) | (3,391)
Balance, end of period | 179,270 | 182,868 | 39,161
Loans, Excluding Acquired Loans | Consumer | Credit Card |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance, beginning of period | 7,472 | 4,051 | 3,923
Provision for credit loss expense | (908) | 4,288 | 3,692
Charge-offs | (3,625) | (4,113) | (4,585)
Recoveries | 1,048 | 1,014 | 1,021
Net charge-offs | (2,577) | (3,099) | (3,564)
Balance, end of period | 3,987 | 7,472 | 4,051
Cumulative Effect, Period of Adoption, Adjustment | Loans, Excluding Acquired Loans |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance, beginning of period | 13,451 | 151,377 |
Balance, end of period |  | 13,451 | 151,377
Cumulative Effect, Period of Adoption, Adjustment | Loans, Excluding Acquired Loans | Other Consumer and Other |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance, beginning of period | 1 | 12,098 |
Balance, end of period |  | 1 | 12,098
Cumulative Effect, Period of Adoption, Adjustment | Loans, Excluding Acquired Loans | Commercial |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance, beginning of period | 3,349 | 22,733 |
Balance, end of period |  | 3,349 | 22,733
Cumulative Effect, Period of Adoption, Adjustment | Loans, Excluding Acquired Loans | Real Estate |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance, beginning of period | 10,101 | 114,314 |
Balance, end of period |  | 10,101 | 114,314
Cumulative Effect, Period of Adoption, Adjustment | Loans, Excluding Acquired Loans | Consumer | Credit Card |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance, beginning of period | $ 0 | 2,232 |
Balance, end of period |  | $ 0 | $ 2,232

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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 excluding accrued interest, of allowance for credit loss on financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
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- Definition Amount, after recovery, of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (4) + Details
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