Noninterest Income - Deposit Service Charges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Service fees
Revenue from External Customer [Line Items]
Noninterest income	$ 12,725	$ 12,420	$ 10,526
Return and overdraft fees
Revenue from External Customer [Line Items]
Noninterest income	6,819	9,911	7,676
Other deposit service fees
Revenue from External Customer [Line Items]
Noninterest income	455	641	569
Total deposit service charges
Revenue from External Customer [Line Items]
Noninterest income	$ 19,999	$ 22,972	$ 18,771