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Loans and Allowance for Loan Losses - Activity in the Allowance for Loan Losses, by Portfolio Segment, for the Current Year (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Allowance for Loan and Lease Losses [Roll Forward] |  |
Provision for credit loss expense | $ 26,134 | $ 9,285
Balance, end of period | 243,195 |
Loans, Excluding Acquired Loans |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |
Balance, beginning of period | 68,244 | 56,694
Provision for credit loss expense | 26,197 | 9,285
Charge-offs | (3,739) | (6,264)
Recoveries | 1,116 | 840
Net charge-offs | (2,623) | (5,424)
Balance, end of period | 243,195 | 60,555
Loans, Excluding Acquired Loans | Other Consumer and Other |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |
Balance, beginning of period | 2,169 | 2,419
Provision for credit loss expense | 4,698 | 1,206
Charge-offs | (1,379) | (1,553)
Recoveries | 443 | 300
Net charge-offs | (936) | (1,253)
Balance, end of period | 18,029 | 2,372
Loans, Excluding Acquired Loans | Commercial |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |
Balance, beginning of period | 22,863 | 20,514
Provision for credit loss expense | 30,907 | 1,874
Charge-offs | (523) | (3,152)
Recoveries | 347 | 158
Net charge-offs | (176) | (2,994)
Balance, end of period | 76,327 | 19,394
Loans, Excluding Acquired Loans | Real Estate |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |
Balance, beginning of period | 39,161 | 29,838
Provision for credit loss expense | (12,158) | 5,307
Charge-offs | (396) | (417)
Recoveries | 101 | 142
Net charge-offs | (295) | (275)
Balance, end of period | 141,022 | 34,870
Loans, Excluding Acquired Loans | Credit Card | Credit cards |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |
Balance, beginning of period | 4,051 | 3,923
Provision for credit loss expense | 2,750 | 898
Charge-offs | (1,441) | (1,142)
Recoveries | 225 | 240
Net charge-offs | (1,216) | (902)
Balance, end of period | 7,817 | $ 3,919
Impact of CECL adoption | Loans, Excluding Acquired Loans |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |
Balance, beginning of period | 151,377 |
Impact of CECL adoption | Loans, Excluding Acquired Loans | Other Consumer and Other |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |
Balance, beginning of period | 12,098 |
Impact of CECL adoption | Loans, Excluding Acquired Loans | Commercial |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |
Balance, beginning of period | 22,733 |
Impact of CECL adoption | Loans, Excluding Acquired Loans | Real Estate |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |
Balance, beginning of period | 114,314 |
Impact of CECL adoption | Loans, Excluding Acquired Loans | Credit Card | Credit cards |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |
Balance, beginning of period | $ 2,232 |

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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=119407570&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=118955255&loc=SL82922352-210448 + Details
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