Other Noninterest Income and Expense - Summary of Other Noninterest Income and Other Noninterest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Other Income and Expenses [Abstract]
Interest rate swap mark-to-market adjustment	$ 1,863	$ 5,988
Other	9,192	21,739
Total other noninterest income	11,055	27,727
Outside processing	16,730	13,913
Loan and lease expense	7,185	7,783
Professional fees	9,073	6,569
Advertising and marketing	6,879	8,377
FDIC insurance	5,688	6,559
Card processing and issuance costs	4,274	8,690
Other	35,414	36,855
Total other noninterest expense	$ 85,243	$ 88,746