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Allowance for Credit Losses and Credit Quality of Loans, Allowance for Credit Losses by Portfolio Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Activity in allowance for credit losses by portfolio segment [Roll Forward] |  |  |  |
Balance, beginning of period | $ 93,600 | $ 98,500 | $ 92,000 | $ 110,000
Charge-offs | (4,693) | (4,887) | (13,230) | (13,556)
Recoveries | 3,409 | 2,729 | 8,560 | 7,910
Provision | 4,484 | (3,342) | 9,470 | (11,354)
Balance, end of period | 96,800 | 93,000 | 96,800 | 93,000
Commercial Loans [Member] |  |  |  |
Activity in allowance for credit losses by portfolio segment [Roll Forward] |  |  |  |
Balance, beginning of period | 32,358 | 44,191 | 28,941 | 50,942
Charge-offs | (624) | (1,492) | (1,659) | (2,123)
Recoveries | 1,282 | 354 | 2,212 | 533
Provision | (60) | (9,875) | 3,462 | (16,174)
Balance, end of period | 32,956 | 33,178 | 32,956 | 33,178
Consumer Loans [Member] |  |  |  |
Activity in allowance for credit losses by portfolio segment [Roll Forward] |  |  |  |
Balance, beginning of period | 44,940 | 34,881 | 44,253 | 37,803
Charge-offs | (3,951) | (3,083) | (11,051) | (10,702)
Recoveries | 1,924 | 2,143 | 5,693 | 6,506
Provision | 5,397 | 7,130 | 9,415 | 7,464
Balance, end of period | 48,310 | 41,071 | 48,310 | 41,071
Residential [Member] |  |  |  |
Activity in allowance for credit losses by portfolio segment [Roll Forward] |  |  |  |
Balance, beginning of period | 16,302 | 19,428 | 18,806 | 21,255
Charge-offs | (118) | (312) | (520) | (731)
Recoveries | 203 | 232 | 655 | 871
Provision | (853) | (597) | (3,407) | (2,644)
Balance, end of period | $ 15,534 | $ 18,751 | $ 15,534 | $ 18,751

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