Segment Reporting (Details) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) segment	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Segment Reporting [Abstract]
Reportable business segments | segment				3
Segment Reporting Information [Line Items]
Total assets		$ 4,801,998	$ 4,417,363	$ 4,801,998	$ 4,417,363	$ 4,554,862
Interest income		49,255	42,172	139,249	120,598
Interest expense		8,832	5,285	22,564	14,128
Net interest income	[1]	40,423	36,887	116,685	106,470
Provision for loan and lease losses		2,745	2,689	20,207	7,900
Noninterest income		14,861	14,109	45,757	45,088
Intangible expenses		479	690	1,685	1,895
Restructuring charges				571
Other noninterest expense		33,892	32,005	101,587	95,378
Intersegment (revenue) expense		0	0	0	0
Income before income taxes		18,168	15,612	38,392	46,385
Income tax expense		3,204	4,416	6,221	12,555
Net income		14,964	11,196	32,171	33,830
Capital expenditures		745	768	2,698	7,412
Banking [Member]
Segment Reporting Information [Line Items]
Total assets		4,711,093	4,327,920	4,711,093	4,327,920	4,466,301
Interest income		49,238	42,161	139,204	120,575
Interest expense		7,571	4,031	18,781	10,352
Net interest income	[1]	41,667	38,130	120,423	110,223
Provision for loan and lease losses		2,745	2,689	20,207	7,900
Noninterest income		5,070	4,993	15,320	16,945
Intangible expenses		240	357	898	1,151
Restructuring charges				571
Other noninterest expense		26,542	25,733	80,790	74,949
Intersegment (revenue) expense		(512)	(264)	(1,098)	(792)
Income before income taxes		17,722	14,608	34,375	43,960
Income tax expense		3,171	4,033	5,006	11,754
Net income		14,551	10,575	29,369	32,206
Capital expenditures		570	582	2,360	6,921
Wealth Management [Member]
Segment Reporting Information [Line Items]
Total assets		38,042	34,903	38,042	34,903	34,600
Interest income		9	4	22	6
Interest expense		0	0	0	0
Net interest income	[1]	9	4	22	6
Provision for loan and lease losses		0	0	0	0
Noninterest income		5,795	5,428	17,397	15,965
Intangible expenses		136	168	415	506
Restructuring charges				0
Other noninterest expense		3,547	3,472	10,969	10,404
Intersegment (revenue) expense		377	146	686	438
Income before income taxes		1,744	1,646	5,349	4,623
Income tax expense		493	648	1,636	1,812
Net income		1,251	998	3,713	2,811
Capital expenditures		73	5	162	27
Insurance [Member]
Segment Reporting Information [Line Items]
Total assets		29,299	25,139	29,299	25,139	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		3,845	3,620	12,835	11,913
Intangible expenses		103	165	372	238
Restructuring charges				0
Other noninterest expense		3,087	2,803	9,425	8,718
Intersegment (revenue) expense		135	118	412	354
Income before income taxes		520	534	2,626	2,603
Income tax expense		156	224	775	1,095
Net income		364	310	1,851	1,508
Capital expenditures		16	3	25	202
Other Segments [Member]
Segment Reporting Information [Line Items]
Total assets		23,564	29,401	23,564	29,401	$ 26,115
Interest income		8	7	23	17
Interest expense		1,261	1,254	3,783	3,776
Net interest income	[1]	(1,253)	(1,247)	(3,760)	(3,759)
Provision for loan and lease losses		0	0	0	0
Noninterest income		151	68	205	265
Intangible expenses		0	0	0	0
Restructuring charges				0
Other noninterest expense		716	(3)	403	1,307
Intersegment (revenue) expense		0	0	0	0
Income before income taxes		(1,818)	(1,176)	(3,958)	(4,801)
Income tax expense		(616)	(489)	(1,196)	(2,106)
Net income		(1,202)	(687)	(2,762)	(2,695)
Capital expenditures		$ 86	$ 178	$ 151	$ 262

[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.