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Fair Value Measurements - Recurring (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Assets:
Securities available-for-sale	$ 449,694	$ 449,694	$ 484,648
Mortgage servicing rights	4,108		5,935
US Treasury Securities [Member]
Assets:
Securities available-for-sale	4,152		4,036
US Government Corporations and Agencies Securities [Member]
Assets:
Securities available-for-sale	7,723		8,337
Mortgage Backed Securities, Issued by US Government Agencies [Member]
Assets:
Securities available-for-sale	17,255
US States and Political Subdivisions Debt Securities [Member]
Assets and liabilities measured at fair value on a recurring basis
Purchases	6,100	$ 11,325
Assets:
Securities available-for-sale	255,095		249,175
Collateralized Mortgage Obligations [Member]
Assets:
Securities available-for-sale	53,403		57,984
Asset-backed Securities [Member]
Assets:
Securities available-for-sale	77,727		81,844
Collateralized loan obligations
Assets:
Securities available-for-sale	34,339		66,684
Fair Value, Inputs, Level 1 [Member]
Assets:
Securities available-for-sale	4,152		4,036
Fair Value, Inputs, Level 2 [Member]
Assets:
Securities available-for-sale	434,385		475,193
Loans held-for-sale	10,049		3,061
Other assets	11,115		2,771
Liabilities:
Other liabilities	16,795		5,921
Level 3
Assets:
Securities available-for-sale	11,157		5,419
Mortgage servicing rights	4,108		5,935
Level 3 \| US States and Political Subdivisions Debt Securities [Member]
Assets:
Securities available-for-sale	11,200		19,600
Recurring
Assets:
Securities available-for-sale			8,337
Total financial assets	475,698		496,665
Liabilities:
Total	16,912		5,974
Recurring \| Finite-Lived Intangible Assets [Member]
Assets:
Loans held-for-sale	10,049		3,061
Mortgage servicing rights	4,108		5,935
Recurring \| Interest Rate Swap [Member]
Liabilities:
Other liabilities	16,912		5,974
Recurring \| Interest Rate Swap [Member] \| Finite-Lived Intangible Assets [Member]
Assets:
Other assets	11,115		2,771
Recurring \| Forward Contracts [Member] \| Finite-Lived Intangible Assets [Member]
Assets:
Other assets	732		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	4,152
Recurring \| US Government Corporations and Agencies Securities [Member] \| Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	7,723
Recurring \| Mortgage Backed Securities, Issued by US Government Agencies [Member] \| Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	17,255		16,588
Recurring \| US States and Political Subdivisions Debt Securities [Member] \| Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	255,095		249,175
Recurring \| Collateralized Mortgage Obligations [Member] \| Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	53,403		57,984
Recurring \| Asset-backed Securities [Member] \| Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	77,727		81,844
Recurring \| Collateralized loan obligations \| Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	34,339		66,684
Recurring \| Fair Value, Inputs, Level 1 [Member]
Assets:
Total financial assets	4,152		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	4,152
Recurring \| Fair Value, Inputs, Level 2 [Member]
Assets:
Securities available-for-sale			8,337
Total financial assets	456,281		481,275
Liabilities:
Total	16,912		5,974
Recurring \| Fair Value, Inputs, Level 2 [Member] \| Finite-Lived Intangible Assets [Member]
Assets:
Loans held-for-sale	10,049		3,061
Recurring \| Fair Value, Inputs, Level 2 [Member] \| Interest Rate Swap [Member]
Liabilities:
Other liabilities	16,912		5,974
Recurring \| Fair Value, Inputs, Level 2 [Member] \| Interest Rate Swap [Member] \| Finite-Lived Intangible Assets [Member]
Assets:
Other assets	11,115		2,771
Recurring \| Fair Value, Inputs, Level 2 [Member] \| Forward Contracts [Member] \| Finite-Lived Intangible Assets [Member]
Assets:
Other assets	732		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	7,723
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	17,255		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	243,938		243,756
Recurring \| Fair Value, Inputs, Level 2 [Member] \| Collateralized Mortgage Obligations [Member] \| Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	53,403		57,984
Recurring \| Fair Value, Inputs, Level 2 [Member] \| Asset-backed Securities [Member] \| Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	77,727		81,844
Recurring \| Fair Value, Inputs, Level 2 [Member] \| Collateralized loan obligations \| Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	34,339		66,684
Recurring \| Level 3
Assets:
Total financial assets	15,265		11,354
Recurring \| Level 3 \| Finite-Lived Intangible Assets [Member]
Assets:
Mortgage servicing rights	4,108		5,935
Recurring \| Level 3 \| US States and Political Subdivisions Debt Securities [Member] \| Finite-Lived Intangible Assets [Member]
Assets:
Securities available-for-sale	$ 11,157		$ 5,419