Noninterest Income - Credit/Debit Card and ATM Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Total credit/debit card and ATM income
Revenue from External Customer [Line Items]
Noninterest income	$ 35,014	$ 50,383	$ 43,837
Bailment fees
Revenue from External Customer [Line Items]
Noninterest income	14,615	26,256	27,767
Interchange fees
Revenue from External Customer [Line Items]
Noninterest income	17,747	22,975	14,982
Other card and ATM fees
Revenue from External Customer [Line Items]
Noninterest income	$ 2,652	$ 1,152	$ 1,088