Intangible Assets - Changes in Mortgage Servicing Rights (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Changes in mortgage servicing rights
Balance at beginning of period		$ 2,482
Changes in fair value:
Balance at end of period		2,274
Mortgage servicing rights (MSRs)
Changes in mortgage servicing rights
Balance at beginning of period		2,482	$ 2,931
Originated mortgage servicing rights		67	38
Changes in fair value:
Due to changes in model inputs and assumptions	[1]	(198)	(32)
Other changes in fair value	[2]	(77)	(62)
Total changes in fair value		(275)	(94)
Balance at end of period		$ 2,274	$ 2,875

[1] The change in fair value resulting from changes in valuation inputs or assumptions, reported in real estate servicing fees, net, used in the valuation model reflects the change in discount rates and prepayment speed assumptions primarily due to changes in interest rates.

[2] Other changes in fair value, reported in real estate servicing fees, net, reflect changes due to customer payments and passage of time.