Segment Reporting - Schedule of Segment Reporting (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) segment	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting [Abstract]
Reportable business segments | segment	3
Segment Reporting Information [Line Items]
Total assets	$ 5,035,527	$ 4,613,959	$ 4,984,347
Interest income	52,364	43,534
Interest expense	10,841	6,262
Net interest income	41,523	37,272
Provision for loan and lease losses	2,685	2,053
Noninterest income	16,297	15,582
Intangible expenses	426	612
Restructuring charges		571
Other noninterest expense	35,131	33,942
Intersegment (revenue) expense	0	0
Income before income taxes	19,578	15,676
Income tax expense	3,499	2,826
Net income	16,079	12,850
Capital expenditures	850	1,081
Banking [Member]
Segment Reporting Information [Line Items]
Total assets	4,942,539	4,519,423	4,895,732
Interest income	52,346	43,522
Interest expense	9,580	5,001
Net interest income	42,766	38,521
Provision for loan and lease losses	2,685	2,053
Noninterest income	4,971	4,789
Intangible expenses	233	329
Restructuring charges		571
Other noninterest expense	27,779	27,661
Intersegment (revenue) expense	(299)	(291)
Income before income taxes	17,339	12,987
Income tax expense	3,120	1,998
Net income	14,219	10,989
Capital expenditures	765	970
Wealth Management [Member]
Segment Reporting Information [Line Items]
Total assets	40,910	36,848	39,090
Interest income	10	5
Interest expense	0	0
Net interest income	10	5
Provision for loan and lease losses	0	0
Noninterest income	5,720	5,740
Intangible expenses	105	142
Restructuring charges		0
Other noninterest expense	3,794	3,658
Intersegment (revenue) expense	166	153
Income before income taxes	1,665	1,792
Income tax expense	314	545
Net income	1,351	1,247
Capital expenditures	39	49
Insurance [Member]
Segment Reporting Information [Line Items]
Total assets	31,837	28,651	30,117
Interest income	0	0
Interest expense	0	0
Net interest income	0	0
Provision for loan and lease losses	0	0
Noninterest income	5,353	5,086
Intangible expenses	88	141
Restructuring charges		0
Other noninterest expense	3,126	3,245
Intersegment (revenue) expense	133	138
Income before income taxes	2,006	1,562
Income tax expense	193	456
Net income	1,813	1,106
Capital expenditures	25	7
Other Segments [Member]
Segment Reporting Information [Line Items]
Total assets	20,241	29,037	$ 19,408
Interest income	8	7
Interest expense	1,261	1,261
Net interest income	(1,253)	(1,254)
Provision for loan and lease losses	0	0
Noninterest income	253	(33)
Intangible expenses	0	0
Restructuring charges		0
Other noninterest expense	432	(622)
Intersegment (revenue) expense	0	0
Income before income taxes	(1,432)	(665)
Income tax expense	(128)	(173)
Net income	(1,304)	(492)
Capital expenditures	$ 21	$ 55