Fair Value Measurements - Recurring (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Assets:
Securities available-for-sale	$ 448,421		$ 484,648
Mortgage servicing rights	5,010		5,935
US Treasury Securities [Member]
Assets:
Securities available-for-sale	4,134		4,036
US Government Corporations and Agencies Securities [Member]
Assets:
Securities available-for-sale	7,005		8,337
Mortgage Backed Securities, Issued by US Government Agencies [Member]
Assets:
Securities available-for-sale	18,219
US States and Political Subdivisions Debt Securities [Member]
Assets and liabilities measured at fair value on a recurring basis
Purchases	12,900	$ 17,643
Assets:
Securities available-for-sale	249,777		249,175
Collateralized Mortgage Obligations [Member]
Assets:
Securities available-for-sale	57,013		57,984
Asset-backed Securities [Member]
Assets:
Securities available-for-sale	81,585		81,844
Collateralized loan obligations
Assets:
Securities available-for-sale	30,688		66,684
Fair Value, Inputs, Level 1 [Member]
Assets:
Securities available-for-sale	4,134		4,036
Fair Value, Inputs, Level 2 [Member]
Assets:
Securities available-for-sale	439,497		475,193
Loans held-for-sale	10,229		3,061
Other assets	10,506		2,771
Liabilities:
Other liabilities	15,128		5,921
Level 3
Assets:
Securities available-for-sale	4,790		5,419
Mortgage servicing rights	5,010		5,935
Level 3 | US States and Political Subdivisions Debt Securities [Member]
Assets:
Securities available-for-sale	4,800		5,900
Recurring
Assets:
Securities available-for-sale			8,337
Total financial assets	475,600		496,665
Liabilities:
Total	15,231		5,974
Recurring | Finite-Lived Intangible Assets [Member]
Assets:
Loans held-for-sale	10,229		3,061
Mortgage servicing rights	5,010		5,935
Recurring | Interest Rate Swap [Member]
Liabilities:
Other liabilities	15,231		5,974
Recurring | Interest Rate Swap [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Other assets	10,506		2,771
Recurring | Forward Contracts [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Other assets	1,434		250
Recurring | US Treasury Securities [Member]
Assets:
Securities available-for-sale			4,036
Recurring | US Treasury Securities [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	4,134
Recurring | US Government Corporations and Agencies Securities [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	7,005
Recurring | Mortgage Backed Securities, Issued by US Government Agencies [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	18,219		16,588
Recurring | US States and Political Subdivisions Debt Securities [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	249,777		249,175
Recurring | Collateralized Mortgage Obligations [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	57,013		57,984
Recurring | Asset-backed Securities [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	81,585		81,844
Recurring | Collateralized loan obligations | Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	30,688		66,684
Recurring | Fair Value, Inputs, Level 1 [Member]
Assets:
Total financial assets	4,134		4,036
Recurring | Fair Value, Inputs, Level 1 [Member] | US Treasury Securities [Member]
Assets:
Securities available-for-sale			4,036
Recurring | Fair Value, Inputs, Level 1 [Member] | US Treasury Securities [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	4,134
Recurring | Fair Value, Inputs, Level 2 [Member]
Assets:
Securities available-for-sale			8,337
Total financial assets	461,666		481,275
Liabilities:
Total	15,231		5,974
Recurring | Fair Value, Inputs, Level 2 [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Loans held-for-sale	10,229		3,061
Recurring | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Liabilities:
Other liabilities	15,231		5,974
Recurring | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Other assets	10,506		2,771
Recurring | Fair Value, Inputs, Level 2 [Member] | Forward Contracts [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Other assets	1,434		250
Recurring | Fair Value, Inputs, Level 2 [Member] | US Government Corporations and Agencies Securities [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	7,005
Recurring | Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities, Issued by US Government Agencies [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	18,219		16,588
Recurring | Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	244,987		243,756
Recurring | Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Obligations [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	57,013		57,984
Recurring | Fair Value, Inputs, Level 2 [Member] | Asset-backed Securities [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	81,585		81,844
Recurring | Fair Value, Inputs, Level 2 [Member] | Collateralized loan obligations | Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	30,688		66,684
Recurring | Level 3
Assets:
Total financial assets	9,800		11,354
Recurring | Level 3 | Finite-Lived Intangible Assets [Member]
Assets:
Mortgage servicing rights	5,010		5,935
Recurring | Level 3 | US States and Political Subdivisions Debt Securities [Member] | Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	$ 4,790		$ 5,419