Goodwill and Other Intangible Assets - Components of Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 34,913	$ 34,767
Accumulated amortization	25,815	24,483
Net carrying amount	9,098	10,284
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	6,788	6,788
Accumulated amortization	4,431	4,026
Net carrying amount	2,357	2,762
Customer Related Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	7,604	8,819
Accumulated amortization	6,944	7,923
Net carrying amount	660	896
Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	20,521	19,160
Accumulated amortization	14,440	12,534
Net carrying amount	$ 6,081	$ 6,626