Revenue Recognition - Service Charged on Deposit Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	$ 17,933	$ 18,551	$ 20,619
Wire transfer fees	4,558	4,934	$ 5,057
Wire transfer fees
Disaggregation of Revenue [Line Items]
Wire transfer fees	4,058	4,463
Foreign exchange fees
Disaggregation of Revenue [Line Items]
Wire transfer fees	500	471
Noninterest Bearing Deposits
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	17,862	18,489
Noninterest Bearing Deposits | Monthly service charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	1,608	1,772
Noninterest Bearing Deposits | Customer analysis charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	7,801	7,825
Noninterest Bearing Deposits | NSF charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	7,654	7,986
Noninterest Bearing Deposits | Other service charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	799	906
Interest-bearing Deposits | Monthly service charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	$ 71	$ 62