Servicing Rights - Mortgage Servicing Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period			$ 11,920
Additions for new MSR capitalized			3,032	$ 2,672
Changes in fair value:
Balance, end of period	$ 10,589		10,589
Balance of mortgage loans serviced for others	$ 655,733		$ 655,733		$ 659,048
MSR as a percentage of serviced loans	1.61%		1.61%		1.81%
Mortgage servicing rights
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 10,721	$ 10,836	$ 11,920	10,821
Additions for new MSR capitalized	1,373	1,033	3,032	2,672
Changes in fair value:
Due to changes in model inputs of assumptions	(699)	(378)	(2,291)	(1,385)
Other	(806)	(285)	(2,072)	(902)
Balance, end of period	10,589	$ 11,206	10,589	$ 11,206
Balance of mortgage loans serviced for others	$ 655,733		$ 655,733		$ 659,048
MSR as a percentage of serviced loans	1.61%		1.61%		1.81%