Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total assets	$ 4,273,931	$ 2,824,777	$ 4,230,528
Interest income	38,396	25,734
Interest expense	4,113	2,211
Net interest income	34,283	23,523
Provision for loan and lease losses	2,445	326
Noninterest income	14,970	13,831
Intangible expenses	759	766
Acquisition-related and integration costs and restructuring charges		220
Other noninterest expense	31,271	25,953
Intersegment (revenue) expense	0	0
Income before income taxes	14,778	10,089
Income taxes	3,922	2,800
Net income	10,856	7,289
Capital expenditures	4,388	2,178
Banking [Member]
Segment Reporting Information [Line Items]
Total assets	4,187,607	2,746,433	4,137,873
Interest income	38,392	25,725
Interest expense	4,113	2,211
Net interest income	34,279	23,514
Provision for loan and lease losses	2,445	326
Noninterest income	5,162	4,548
Intangible expenses	396	63
Acquisition-related and integration costs and restructuring charges		10
Other noninterest expense	23,744	18,736
Intersegment (revenue) expense	(567)	(511)
Income before income taxes	13,423	9,438
Income taxes	3,641	2,357
Net income	9,782	7,081
Capital expenditures	4,320	1,839
Wealth Management [Member]
Segment Reporting Information [Line Items]
Total assets	31,178	30,134	35,061
Interest income	1	2
Interest expense	0	0
Net interest income	1	2
Provision for loan and lease losses	0	0
Noninterest income	5,138	4,572
Intangible expenses	170	303
Acquisition-related and integration costs and restructuring charges		0
Other noninterest expense	3,471	3,058
Intersegment (revenue) expense	237	219
Income before income taxes	1,261	994
Income taxes	500	383
Net income	761	611
Capital expenditures	11	15
Insurance [Member]
Segment Reporting Information [Line Items]
Total assets	24,412	24,715	24,472
Interest income	0	0
Interest expense	0	0
Net interest income	0	0
Provision for loan and lease losses	0	0
Noninterest income	4,547	4,720
Intangible expenses	193	400
Acquisition-related and integration costs and restructuring charges		0
Other noninterest expense	3,069	3,119
Intersegment (revenue) expense	330	292
Income before income taxes	955	909
Income taxes	404	377
Net income	551	532
Capital expenditures	7	10
Other Segments [Member]
Segment Reporting Information [Line Items]
Total assets	30,734	23,495	$ 33,122
Interest income	3	7
Interest expense	0	0
Net interest income	3	7
Provision for loan and lease losses	0	0
Noninterest income	123	(9)
Intangible expenses	0	0
Acquisition-related and integration costs and restructuring charges		210
Other noninterest expense	987	1,040
Intersegment (revenue) expense	0	0
Income before income taxes	(861)	(1,252)
Income taxes	(623)	(317)
Net income	(238)	(935)
Capital expenditures	$ 50	$ 314