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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 | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Balance, beginning of period |  |  | $ 238,050 |
Provision for credit loss expense | $ (12,951) | $ 21,915 | (11,506) | $ 45,049
Balance, end of period | 227,239 |  | 227,239 |
Loans, Excluding Acquired Loans |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Balance, beginning of period | 235,116 | 243,195 | 238,050 | 68,244
Provision for credit loss expense | (10,011) | 26,678 | (10,011) | 52,875
Charge-offs | (2,205) | (39,156) | (6,456) | (42,895)
Recoveries | 4,339 | 926 | 5,656 | 2,042
Net charge-offs | 2,134 | (38,230) | (800) | (40,853)
Balance, end of period | 227,239 | 231,643 | 227,239 | 231,643
Loans, Excluding Acquired Loans | Other Consumer and Other |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Balance, beginning of period | 2,485 | 18,029 | 5,617 | 2,169
Provision for credit loss expense | 1,117 | (5,685) | (1,617) | (987)
Charge-offs | (411) | (592) | (1,113) | (1,971)
Recoveries | 425 | 303 | 729 | 746
Net charge-offs | 14 | (289) | (384) | (1,225)
Balance, end of period | 3,616 | 12,055 | 3,616 | 12,055
Loans, Excluding Acquired Loans | Commercial |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Balance, beginning of period | 34,633 | 76,327 | 42,093 | 22,863
Provision for credit loss expense | (6,678) | 18,400 | (13,599) | 49,307
Charge-offs | (309) | (35,687) | (1,168) | (36,210)
Recoveries | 2,147 | 98 | 2,467 | 445
Net charge-offs | 1,838 | (35,589) | 1,299 | (35,765)
Balance, end of period | 29,793 | 59,138 | 29,793 | 59,138
Loans, Excluding Acquired Loans | Real Estate |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Balance, beginning of period | 195,826 | 141,022 | 182,868 | 39,161
Provision for credit loss expense | (8,522) | 10,020 | 5,720 | (2,138)
Charge-offs | (439) | (1,824) | (2,126) | (2,220)
Recoveries | 1,523 | 253 | 1,926 | 354
Net charge-offs | 1,084 | (1,571) | (200) | (1,866)
Balance, end of period | 188,388 | 149,471 | 188,388 | 149,471
Loans, Excluding Acquired Loans | Consumer | Credit cards |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Balance, beginning of period | 2,172 | 7,817 | 7,472 | 4,051
Provision for credit loss expense | 4,072 | 3,943 | (515) | 6,693
Charge-offs | (1,046) | (1,053) | (2,049) | (2,494)
Recoveries | 244 | 272 | 534 | 497
Net charge-offs | (802) | (781) | (1,515) | (1,997)
Balance, end of period | $ 5,442 | $ 10,979 | $ 5,442 | 10,979
Cumulative Effect, Period of Adoption, Adjustment | Loans, Excluding Acquired Loans |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Balance, beginning of period |  |  |  | 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 |  |  |  | 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 |  |  |  | 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 |  |  |  | 114,314
Cumulative Effect, Period of Adoption, Adjustment | Loans, Excluding Acquired Loans | Consumer | Credit cards |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Balance, beginning of period |  |  |  | $ 2,232

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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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