Segment Reporting (Details) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) segment	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Segment Reporting [Abstract]
Reportable business segments | segment				3
Segment Reporting Information [Line Items]
Total assets		$ 4,749,181	$ 4,453,527	$ 4,749,181	$ 4,453,527	$ 4,554,862
Interest income		46,460	40,030	89,994	78,426
Interest expense		7,470	4,730	13,732	8,843
Net interest income	[1]	38,990	35,300	76,262	69,583
Provision for loan and lease losses		15,409	2,766	17,462	5,211
Noninterest income		15,314	16,009	30,896	30,979
Intangible expenses		594	446	1,206	1,205
Restructuring charges				571
Other noninterest expense		33,753	32,102	67,695	63,373
Intersegment (revenue) expense		0	0	0	0
Income before income taxes		4,548	15,995	20,224	30,773
Income tax expense		191	4,217	3,017	8,139
Net income		4,357	11,778	17,207	22,634
Capital expenditures		872	2,256	1,953	6,644
Banking [Member]
Segment Reporting Information [Line Items]
Total assets		4,656,201	4,366,362	4,656,201	4,366,362	4,466,301
Interest income		46,444	40,022	89,966	78,414
Interest expense		6,209	3,469	11,210	6,321
Net interest income	[1]	40,235	36,553	78,756	72,093
Provision for loan and lease losses		15,409	2,766	17,462	5,211
Noninterest income		5,461	6,790	10,250	11,952
Intangible expenses		329	398	658	794
Restructuring charges				571
Other noninterest expense		26,723	24,160	54,384	49,216
Intersegment (revenue) expense		(295)	(264)	(586)	(528)
Income before income taxes		3,530	16,283	16,517	29,352
Income tax expense		(162)	4,193	1,836	7,721
Net income		3,692	12,090	14,681	21,631
Capital expenditures		820	2,019	1,790	6,339
Wealth Management [Member]
Segment Reporting Information [Line Items]
Total assets		37,227	32,806	37,227	32,806	34,600
Interest income		8	1	13	2
Interest expense		0	0	0	0
Net interest income	[1]	8	1	13	2
Provision for loan and lease losses		0	0	0	0
Noninterest income		5,862	5,399	11,602	10,537
Intangible expenses		137	168	279	338
Restructuring charges				0
Other noninterest expense		3,628	3,512	7,286	6,932
Intersegment (revenue) expense		156	146	309	292
Income before income taxes		1,949	1,574	3,741	2,977
Income tax expense		597	639	1,142	1,164
Net income		1,352	935	2,599	1,813
Capital expenditures		40	11	89	22
Insurance [Member]
Segment Reporting Information [Line Items]
Total assets		29,295	25,241	29,295	25,241	27,846
Interest income		0	0	0	0
Interest expense		0	0	0	0
Net interest income	[1]	0	0	0	0
Provision for loan and lease losses		0	0	0	0
Noninterest income		3,904	3,746	8,990	8,293
Intangible expenses		128	(120)	269	73
Restructuring charges				0
Other noninterest expense		3,093	2,846	6,338	5,915
Intersegment (revenue) expense		139	118	277	236
Income before income taxes		544	902	2,106	2,069
Income tax expense		163	379	619	871
Net income		381	523	1,487	1,198
Capital expenditures		2	192	9	199
Other Segments [Member]
Segment Reporting Information [Line Items]
Total assets		26,458	29,118	26,458	29,118	$ 26,115
Interest income		8	7	15	10
Interest expense		1,261	1,261	2,522	2,522
Net interest income	[1]	(1,253)	(1,254)	(2,507)	(2,512)
Provision for loan and lease losses		0	0	0	0
Noninterest income		87	74	54	197
Intangible expenses		0	0	0	0
Restructuring charges				0
Other noninterest expense		309	1,584	(313)	1,310
Intersegment (revenue) expense		0	0	0	0
Income before income taxes		(1,475)	(2,764)	(2,140)	(3,625)
Income tax expense		(407)	(994)	(580)	(1,617)
Net income		(1,068)	(1,770)	(1,560)	(2,008)
Capital expenditures		$ 10	$ 34	$ 65	$ 84

[1] (1)Net interest income as well as many other revenues for financial assets and liabilities including loans, leases, securities, and derivatives are excluded from the scope of the standard. Noninterest income streams that are out-of-scope of the standard include bank owned life insurance income, sales of investment securities and mortgage banking activities.