Goodwill and Other Intangibles - Goodwill and Intangible Assets Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Goodwill [Roll Forward]
Balance December 31, 2017			$ 179,889
Additions			677
Adjustments			2,596
Balance June 30, 2018	$ 183,162		183,162
Finite-lived Intangible Assets [Roll Forward]
Additions			779
Intangible assets amortization	(889)	$ (687)	(1,768)	$ (1,380)
Indefinite-lived Intangible Assets [Roll Forward]
Total Intangible Assets			25,966
Total Intangible Assets	24,977		24,977
Total Goodwill and Intangible Assets, beginning balance			205,855
Intangible Assets (Including Goodwill) Acquired			1,456
Grand Total adjustments			2,596
Intangible assets amortization			(1,768)
Total Goodwill and Intangible Assets, ending balance	208,139		208,139
Domain Name
Goodwill [Roll Forward]
Additions			0
Indefinite-lived Intangible Assets [Roll Forward]
Indefinite-lived intangible assets			151
Indefinite-lived intangible assets	151		151
Core deposit intangible
Goodwill [Roll Forward]
Additions			0
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2017			7,380
Intangible assets amortization			(742)
Finite-lived intangible assets	6,638		$ 6,638
Intangible asset amortization period (Year)			10 years
Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2017			$ 14,173
Additions			779
Intangible assets amortization			(833)
Finite-lived intangible assets	$ 14,119		14,119
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
Goodwill [Roll Forward]
Additions			0
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2017			1,319
Intangible assets amortization			(121)
Finite-lived intangible assets	$ 1,198		1,198
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
Goodwill [Roll Forward]
Additions			0
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2017			2,322
Intangible assets amortization			(32)
Finite-lived intangible assets	$ 2,290		2,290
Trade name | Minimum
Finite-lived Intangible Assets [Roll Forward]
Intangible asset amortization period (Year)	3 years
Favorable lease assets
Goodwill [Roll Forward]
Additions			0
Finite-lived Intangible Assets [Roll Forward]
Balance December 31, 2017			621
Intangible assets amortization			(40)
Finite-lived intangible assets	$ 581		581
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 June 30, 2018	$ 20,412		20,412
Goodwill – Banking
Goodwill [Roll Forward]
Balance December 31, 2017			153,545
Additions			0
Adjustments			2,596
Balance June 30, 2018	156,141		156,141
Goodwill – Insurance
Goodwill [Roll Forward]
Balance December 31, 2017			5,932
Additions			677
Adjustments			0
Balance June 30, 2018	$ 6,609		$ 6,609