Fair Value Measurements, Assets and Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Interest rate lock commitments to originate residential mortgage loans held for sale
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance	$ 2,527	$ 2,208
New production	72,659	24,164
Closed loans / settlements	(76,001)	(29,375)
Other	10,439	5,530
Mortgage derivative gain (loss)	7,097	319
Ending Balance	9,624	2,527
Forward commitments to sell residential mortgage loans
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance	710	2,072
New production	(3,505)	(2,367)
Closed loans / settlements	(12,587)	(5,968)
Other	17,427	6,973
Mortgage derivative gain (loss)	1,335	(1,362)
Ending Balance	2,046	710
Total derivatives
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance	1,817	140
New production	76,164	26,531
Closed loans / settlements	(63,414)	(23,407)
Other	(6,988)	(1,443)
Mortgage derivative gain (loss)	5,762	1,681
Ending Balance	$ 7,579	$ 1,817