Goodwill and Other Intangible Assets - Components of Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 37,612	$ 36,746
Accumulated amortization	(28,216)	(27,880)
Net carrying amount	9,396	8,866
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	6,788	6,788
Accumulated amortization	(5,129)	(4,787)
Net carrying amount	1,659	2,001
Customer Related Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	6,017	7,604
Accumulated amortization	(5,713)	(7,147)
Net carrying amount	304	457
Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	24,807	22,354
Accumulated amortization	(17,374)	(15,946)
Net carrying amount	7,433	6,408
Mortgage Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ (1)	$ (87)