Segment Reporting - Schedule of Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Interest income	$ 38,056	$ 36,705	$ 26,112	$ 25,734	$ 25,747	$ 25,704	$ 25,622	$ 24,910	$ 126,607	$ 101,983	$ 76,192
Interest expense	3,884	3,836	2,451	2,211	2,278	2,220	2,133	1,434	12,382	8,065	3,996
Net interest income	34,172	32,869	23,661	23,523	23,469	23,484	23,489	23,476	114,225	93,918	72,196
Provision for loan and lease losses	2,250	1,415	830	326	917	670	1,141	1,074	4,821	3,802	3,607
Noninterest income	13,994	14,137	14,001	13,831	13,188	12,736	13,242	13,259	55,963	52,425	48,344
Intangible expenses									5,634	2,567	2,167
Acquisition-related and integration costs and restructuring charges									17,655	4,179	1,278
Other noninterest expense									118,692	98,769	83,809
Intersegment (revenue) expense									0	0	0
Income before income taxes	7,486	(1,475)	7,286	10,089	9,711	10,307	8,758	8,250	23,386	37,026	29,679
Income taxes	568	(1,533)	2,046	2,800	2,553	2,779	2,292	2,134	3,881	9,758	7,448
Net income	6,918	$ 58	$ 5,240	$ 7,289	7,158	$ 7,528	$ 6,466	$ 6,116	19,505	27,268	22,231
Total assets	4,230,528				2,879,451				4,230,528	2,879,451
Capital expenditures									11,663	6,730	5,940
Banking [Member]
Segment Reporting Information [Line Items]
Interest income									126,571	101,950	76,157
Interest expense									12,094	8,065	3,998
Net interest income									114,477	93,885	72,159
Provision for loan and lease losses									4,821	3,802	3,607
Noninterest income									21,296	18,934	15,863
Intangible expenses									1,038	293	19
Acquisition-related and integration costs and restructuring charges									16,096	1,992	285
Other noninterest expense									84,089	76,099	65,008
Intersegment (revenue) expense									(1,766)	(2,115)	(2,192)
Income before income taxes									31,495	32,748	21,295
Income taxes									6,510	7,693	4,043
Net income									24,985	25,055	17,252
Total assets	4,137,873				2,797,746				4,137,873	2,797,746
Capital expenditures									9,944	5,003	5,607
Wealth Management [Member]
Segment Reporting Information [Line Items]
Interest income									5	1	1
Interest expense									0	0	0
Net interest income									5	1	1
Provision for loan and lease losses									0	0	0
Noninterest income									19,318	18,874	19,918
Intangible expenses									3,132	410	1,138
Acquisition-related and integration costs and restructuring charges									0	0	0
Other noninterest expense									12,980	12,276	11,752
Intersegment (revenue) expense									788	867	965
Income before income taxes									2,423	5,322	6,064
Income taxes									857	2,054	2,269
Net income									1,566	3,268	3,795
Total assets	35,061				33,950				35,061	33,950
Capital expenditures									29	19	73
Insurance [Member]
Segment Reporting Information [Line Items]
Interest income									0	0	0
Interest expense									0	0	0
Net interest income									0	0	0
Provision for loan and lease losses									0	0	0
Noninterest income									15,150	14,396	12,038
Intangible expenses									1,464	1,864	1,010
Acquisition-related and integration costs and restructuring charges									0	0	59
Other noninterest expense									11,924	10,849	9,139
Intersegment (revenue) expense									978	1,248	1,227
Income before income taxes									784	435	603
Income taxes									348	164	256
Net income									436	271	347
Total assets	24,472				24,436				24,472	24,436
Capital expenditures									30	58	116
Other Segments [Member]
Segment Reporting Information [Line Items]
Interest income									31	32	34
Interest expense									288	0	(2)
Net interest income									(257)	32	36
Provision for loan and lease losses									0	0	0
Noninterest income									199	221	525
Intangible expenses									0	0	0
Acquisition-related and integration costs and restructuring charges									1,559	2,187	934
Other noninterest expense									9,699	(455)	(2,090)
Intersegment (revenue) expense									0	0	0
Income before income taxes									(11,316)	(1,479)	1,717
Income taxes									(3,834)	(153)	880
Net income									(7,482)	(1,326)	837
Total assets	$ 33,122				$ 23,319				33,122	23,319
Capital expenditures									$ 1,660	$ 1,650	$ 144