Goodwill and Other Intangible Assets - Schedule of Change in Loan Servicing Rights (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Loan servicing rights:
Balance at beginning of year	$ 24,732	$ 24,193	$ 22,084
Origination of loan servicing rights	8,322	7,473	8,216
Amortization expense	(10,244)	(6,934)	(6,107)
Balance at end of year	22,810	24,732	24,193
Valuation allowance:
Balance at beginning of year	(47)	(83)	(471)
Impairment adjustment	(818)	36	388
Balance at end of year	(865)	(47)	(83)
Balance at end of year, net of valuation allowance	$ 21,945	$ 24,685	$ 24,110