Goodwill and Intangibles Assets - Goodwill and Intangible Assets Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Goodwill [Roll Forward]
Balance December 31, 2018			$ 184,012
Additions			0
Adjustments			0
Balance June 30, 2019	$ 184,012		184,012
Finite-lived Intangible Assets [Roll Forward]
Additions			18
Intangible assets amortization	(956)	$ (889)	(1,894)	$ (1,768)
Indefinite-lived Intangible Assets [Roll Forward]
Total Intangible Assets			23,455
Additions			18
Adjustments			(541)
Intangible assets amortization	(956)	$ (889)	(1,894)	$ (1,768)
Total Intangible Assets	21,038		21,038
Total Goodwill and Intangible Assets, beginning balance			207,467
Intangible Assets (Including Goodwill) Acquired			18
Grand Total adjustments			(541)
Intangible assets amortization			(1,894)
Total Goodwill and Intangible Assets, ending balance	205,050		205,050
Domain Name
Indefinite-lived Intangible Assets [Roll Forward]
Indefinite-lived intangible assets, beginning of period			151
Indefinite-lived intangible assets acquired			0
Indefinite-lived intangible assets, end of period	151		151
Core deposit intangible
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2018			5,906
Additions			0
Intangible assets amortization			(655)
Balance September 30, 2018	5,251		$ 5,251
Intangible asset amortization period (Year)			10 years
Indefinite-lived Intangible Assets [Roll Forward]
Additions			$ 0
Intangible assets amortization			(655)
Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2018			13,607
Additions			18
Intangible assets amortization			(895)
Balance September 30, 2018	12,730		12,730
Indefinite-lived Intangible Assets [Roll Forward]
Additions			18
Intangible assets amortization			$ (895)
Customer relationships | Minimum
Finite-lived Intangible Assets [Roll Forward]
Intangible asset amortization period (Year)			5 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, 2018			$ 1,101
Additions			0
Intangible assets amortization			(95)
Balance September 30, 2018	1,006		1,006
Indefinite-lived Intangible Assets [Roll Forward]
Additions			0
Intangible assets amortization			$ (95)
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, 2018			$ 2,149
Additions			0
Intangible assets amortization			(249)
Balance September 30, 2018	1,900		1,900
Indefinite-lived Intangible Assets [Roll Forward]
Additions			0
Intangible assets amortization			$ (249)
Trade name | Minimum
Finite-lived Intangible Assets [Roll Forward]
Intangible asset amortization period (Year)			3 years
Trade name | Maximum
Finite-lived Intangible Assets [Roll Forward]
Intangible asset amortization period (Year)			5 years
Favorable lease assets
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2018			$ 541
Additions			0
Intangible assets amortization			0
Balance September 30, 2018	0		0
Indefinite-lived Intangible Assets [Roll Forward]
Additions			0
Adjustments			(541)
Intangible assets amortization			0
Goodwill – Wealth
Goodwill [Roll Forward]
Balance December 31, 2018			20,412
Additions			0
Adjustments			0
Balance June 30, 2019	20,412		20,412
Goodwill – Banking
Goodwill [Roll Forward]
Balance December 31, 2018			156,991
Additions			0
Adjustments			0
Balance June 30, 2019	156,991		156,991
Goodwill – Insurance
Goodwill [Roll Forward]
Balance December 31, 2018			6,609
Additions			0
Adjustments			0
Balance June 30, 2019	$ 6,609		$ 6,609