Goodwill and Intangibles Assets - Goodwill and Intangible Assets Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Goodwill [Roll Forward]
Balance December 31, 2017			$ 179,889
Additions			677
Adjustments			3,298
Balance September 30, 2018	$ 183,864		183,864
Finite-lived Intangible Assets [Roll Forward]
Additions			994
Intangible assets amortization	(891)	$ (677)	(2,659)	$ (2,057)
Indefinite-lived Intangible Assets [Roll Forward]
Total Intangible Assets			25,966
Additions			994
Intangible assets amortization	(891)	$ (677)	(2,659)	$ (2,057)
Total Intangible Assets	24,301		24,301
Total Goodwill and Intangible Assets, beginning balance			205,855
Intangible Assets (Including Goodwill) Acquired			1,671
Grand Total adjustments			3,298
Intangible assets amortization			(2,659)
Total Goodwill and Intangible Assets, ending balance	208,165		208,165
Domain Name
Indefinite-lived Intangible Assets [Roll Forward]
Indefinite-lived intangible assets			151
Indefinite-lived intangible assets acquired			0
Indefinite-lived intangible assets	151		151
Core deposit intangible
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2017			7,380
Additions			0
Intangible assets amortization			(1,108)
Balance September 30, 2018	6,272		$ 6,272
Intangible asset amortization period (Year)			10 years
Indefinite-lived Intangible Assets [Roll Forward]
Additions			$ 0
Intangible assets amortization			(1,108)
Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2017			14,173
Additions			994
Intangible assets amortization			(1,271)
Balance September 30, 2018	$ 13,896		13,896
Indefinite-lived Intangible Assets [Roll Forward]
Additions			994
Intangible assets amortization			(1,271)
Customer relationships | Minimum
Finite-lived Intangible Assets [Roll Forward]
Intangible asset amortization period (Year)	10 years
Customer relationships | Maximum
Finite-lived Intangible Assets [Roll Forward]
Intangible asset amortization period (Year)	20 years
Non-compete agreements
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2017			1,319
Additions			0
Intangible assets amortization			(171)
Balance September 30, 2018	$ 1,148		1,148
Indefinite-lived Intangible Assets [Roll Forward]
Additions			0
Intangible assets amortization			(171)
Non-compete agreements | Minimum
Finite-lived Intangible Assets [Roll Forward]
Intangible asset amortization period (Year)	5 years
Non-compete agreements | Maximum
Finite-lived Intangible Assets [Roll Forward]
Intangible asset amortization period (Year)	10 years
Trade name
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2017			2,322
Additions			0
Intangible assets amortization			(49)
Balance September 30, 2018	$ 2,273		2,273
Indefinite-lived Intangible Assets [Roll Forward]
Additions			0
Intangible assets amortization			(49)
Trade name | Minimum
Finite-lived Intangible Assets [Roll Forward]
Intangible asset amortization period (Year)	3 years
Favorable lease assets
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2017			621
Additions			0
Intangible assets amortization			(60)
Balance September 30, 2018	$ 561		561
Indefinite-lived Intangible Assets [Roll Forward]
Additions			0
Intangible assets amortization			(60)
Favorable lease assets | Minimum
Finite-lived Intangible Assets [Roll Forward]
Intangible asset amortization period (Year)	1 year
Favorable lease assets | Maximum
Finite-lived Intangible Assets [Roll Forward]
Intangible asset amortization period (Year)	16 years
Goodwill – Wealth
Goodwill [Roll Forward]
Balance December 31, 2017			20,412
Additions			0
Adjustments			0
Balance September 30, 2018	$ 20,412		20,412
Goodwill – Banking
Goodwill [Roll Forward]
Balance December 31, 2017			153,545
Additions			0
Adjustments			3,298
Balance September 30, 2018	156,843		156,843
Goodwill – Insurance
Goodwill [Roll Forward]
Balance December 31, 2017			5,932
Additions			677
Adjustments			0
Balance September 30, 2018	$ 6,609		$ 6,609