Loan Servicing (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Servicing Assets at Fair Value [Line Items]
Serviced sold mortgage loans	$ 1,972,000	$ 1,447,000	$ 1,389,000
Serviced sold mortgage loans with recourse	1,700	2,300	2,500
Mortgage loans sold with recourse, reserve	$ 30	$ 25
Mortgage servicing rights, discount rate	12.00%	12.00%
Bank Servicing [Member]
Servicing Assets at Fair Value [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 37,611	$ 15,500	14,266
Bank Servicing [Member] | Real Estate Loan [Member]
Servicing Assets at Fair Value [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 4,100	$ 3,600	$ 3,600
Minimum
Servicing Assets at Fair Value [Line Items]
Mortgage servicing rights, constant prepayment speeds	13.20%	6.60%
Maximum
Servicing Assets at Fair Value [Line Items]
Mortgage servicing rights, constant prepayment speeds	27.54%	18.42%
Mortgages [Member]
Servicing Assets at Fair Value [Line Items]
Servicing Asset at Amortized Cost, Fair Value	$ 12,200	$ 10,100