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Allowance for Credit Losses and Credit Quality of Loans, Allowance for Loan Losses by Portfolio Segments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Activity in allowance for credit losses by portfolio segment [Roll Forward]      
Balance, beginning of period $ 110,000 $ 75,999  
Charge-offs (20,106) (27,078)  
Recoveries 10,363 9,945  
Provision [1] (8,257) 51,134 $ 25,412
Balance, end of period 92,000 110,000 75,999
Commercial Loans [Member]      
Activity in allowance for credit losses by portfolio segment [Roll Forward]      
Balance, beginning of period 50,942 27,156  
Charge-offs (4,638) (4,005)  
Recoveries 723 786  
Provision (18,086) 27,005 4,383
Balance, end of period 28,941 50,942 27,156
Consumer Loans [Member]      
Activity in allowance for credit losses by portfolio segment [Roll Forward]      
Balance, beginning of period 37,803 32,122  
Charge-offs (14,489) (21,938)  
Recoveries 8,571 8,541  
Provision 12,368 19,078 19,954
Balance, end of period 44,253 37,803 32,122
Residential [Member]      
Activity in allowance for credit losses by portfolio segment [Roll Forward]      
Balance, beginning of period 21,255 16,721  
Charge-offs (979) (1,135)  
Recoveries 1,069 618  
Provision (2,539) 5,051 1,075
Balance, end of period $ 18,806 $ 21,255 $ 16,721
[1] Beginning January 1, 2020, calculation is based on current expected loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.