Goodwill and Intangible Assets - Goodwill and Intangible Assets Related to Acquisitions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Roll Forward]
Beginning balance	$ 184,012	$ 184,012
Additions	0	0
Adjustments	0	0
Ending balance	184,012	184,012	$ 184,012
Finite-lived Intangible Assets [Roll Forward]
Additions	0	18
Adjustments	0	(541)
Amortization	(3,567)	(3,801)	(3,656)
Indefinite-lived Intangible Assets [Roll Forward]
Total Intangible Assets, beginning balance	19,131	23,455
Additions	0	18
Amortization	(3,567)	(3,801)	(3,656)
Total Intangible Assets, ending balance	15,564	19,131	23,455
Grand Total, beginning balance	203,143	207,467
Grand Total, Additions	0	18
Grand Total Adjustments	0	(541)
Grand Total, Amortization	(3,567)	(3,801)
Grand Total, ending balance	199,576	203,143	207,467
Core deposit intangible
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2019	4,598	5,906
Additions	0	0
Amortization	(1,110)	(1,308)
Balance December 31, 2020	$ 3,488	$ 4,598	5,906
Amortization Period	10 years	10 years
Indefinite-lived Intangible Assets [Roll Forward]
Additions	$ 0	$ 0
Amortization	(1,110)	(1,308)
Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2019	11,820	13,607
Additions	0	18
Amortization	(1,808)	(1,805)
Balance December 31, 2020	10,012	11,820	13,607
Indefinite-lived Intangible Assets [Roll Forward]
Additions	0	18
Amortization	$ (1,808)	$ (1,805)
Customer relationships | Minimum
Finite-lived Intangible Assets [Roll Forward]
Amortization Period	5 years	5 years
Customer relationships | Maximum
Finite-lived Intangible Assets [Roll Forward]
Amortization Period	20 years	20 years
Non-compete agreements
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2019	$ 911	$ 1,101
Additions	0	0
Amortization	(189)	(190)
Balance December 31, 2020	722	911	1,101
Indefinite-lived Intangible Assets [Roll Forward]
Additions	0	0
Amortization	$ (189)	$ (190)
Non-compete agreements | Minimum
Finite-lived Intangible Assets [Roll Forward]
Amortization Period	5 years	5 years
Non-compete agreements | Maximum
Finite-lived Intangible Assets [Roll Forward]
Amortization Period	10 years	10 years
Trade names
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2019	$ 1,651	$ 2,149
Additions	0	0
Amortization	(460)	(498)
Balance December 31, 2020	1,191	1,651	2,149
Indefinite-lived Intangible Assets [Roll Forward]
Additions	0	0
Amortization	$ (460)	$ (498)
Trade names | Minimum
Finite-lived Intangible Assets [Roll Forward]
Amortization Period	3 years	3 years
Trade names | Maximum
Finite-lived Intangible Assets [Roll Forward]
Amortization Period	5 years	5 years
Favorable lease assets
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2019	$ 0	$ 541
Additions		0
Adjustments		(541)
Amortization		0
Balance December 31, 2020		0	541
Indefinite-lived Intangible Assets [Roll Forward]
Additions		0
Amortization		$ 0
Favorable lease assets | Minimum
Finite-lived Intangible Assets [Roll Forward]
Amortization Period		1 year
Favorable lease assets | Maximum
Finite-lived Intangible Assets [Roll Forward]
Amortization Period		16 years
Domain name
Indefinite-lived Intangible Assets [Roll Forward]
Indefinite-lived intangible assets, beginning balance	151	$ 151
Additions	0	0
Indefinite-lived intangible assets, ending balance	151	151	151
Goodwill – Wealth
Goodwill [Roll Forward]
Beginning balance	20,412	20,412
Additions	0	0
Adjustments	0	0
Ending balance	20,412	20,412	20,412
Goodwill – Banking
Goodwill [Roll Forward]
Beginning balance	156,991	156,991
Additions	0	0
Adjustments	0	0
Ending balance	156,991	156,991	156,991
Goodwill – Insurance
Goodwill [Roll Forward]
Beginning balance	6,609	6,609
Additions	0	0
Adjustments	0	0
Ending balance	$ 6,609	$ 6,609	$ 6,609