Servicing Rights - Mortgage Servicing Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 11,920
Additions for new MSR capitalized	663	$ 1,107
Changes in fair value:
Balance, end of period	11,653
Balance of mortgage loans serviced for others	$ 678,096		$ 659,048
MSR as a percentage of serviced loans	1.72%		1.81%
Mortgage servicing rights
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 11,920	10,821
Additions for new MSR capitalized	663	1,107
Changes in fair value:
Due to changes in model inputs of assumptions	(701)	(377)
Other	(229)	(297)
Balance, end of period	11,653	$ 11,254
Balance of mortgage loans serviced for others	$ 678,096		$ 659,048
MSR as a percentage of serviced loans	1.72%		1.81%