Segment Reporting - Schedule of Segment Reporting (Details) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) segment		Dec. 31, 2018 USD ($)		Dec. 31, 2017 USD ($)
Segment Reporting [Abstract]
Number of reportable segments (in segments) | segment										3
Segment Reporting Information [Line Items]
Interest income		$ 53,369	$ 54,300	$ 54,060	$ 52,364	$ 51,239	$ 49,255	$ 46,460	$ 43,534	$ 214,093		$ 190,488		$ 163,015
Interest expense		10,940	11,655	11,425	10,841	9,862	8,832	7,470	6,262	44,861		32,426		19,839
Net interest income		42,429	42,645	42,635	41,523	41,377	40,423	38,990	37,272	169,232	[1]	158,062	[1]	143,176	[1]
Provision for loan and lease losses		2,227	1,530	2,076	2,685	103	2,745	15,409	2,053	8,518		20,310		9,892
Noninterest income		16,170	16,599	16,356	16,297	14,416	14,861	15,314	15,582	65,422		60,173		59,240
Intangible expenses										1,595		2,166		2,582
Restructuring charges										0		571		0
Other noninterest expense										144,488		134,502		128,131
Intersegment (revenue) expense*										0		0		0
Income before income taxes		18,894	21,444	20,137	19,578	22,294	18,168	4,548	15,676	80,053		60,686		61,811
Income taxes		3,384	3,782	3,669	3,499	3,922	3,204	191	2,826	14,334		10,143		17,717
Net income		15,510	$ 17,662	$ 16,468	$ 16,079	18,372	$ 14,964	$ 4,357	$ 12,850	65,719		50,543		44,094
Total assets		5,380,924				4,984,347				5,380,924		4,984,347
Capital expenditures										2,446		3,367		8,603
Banking [Member]
Segment Reporting Information [Line Items]
Interest income										214,020		190,425		162,982
Interest expense										39,818		27,383		14,802
Net interest income	[1]									174,202		163,042		148,180
Provision for loan and lease losses										8,518		20,310		9,892
Noninterest income										23,748		20,815		21,838
Intangible expenses										884		1,139		1,507
Restructuring charges												571
Other noninterest expense										115,392		106,947		100,670
Intersegment (revenue) expense*										(1,204)		(1,113)		(1,059)
Income before income taxes										74,360		56,003		59,008
Income taxes										13,859		9,085		15,735
Net income										60,501		46,918		43,273
Total assets		5,282,505				4,895,732				5,282,505		4,895,732
Capital expenditures										1,886		3,091		7,731
Wealth Management [Member]
Segment Reporting Information [Line Items]
Interest income										41		32		8
Interest expense										0		0		0
Net interest income	[1]									41		32		8
Provision for loan and lease losses										0		0		0
Noninterest income										23,946		23,179		21,707
Intangible expenses										415		553		674
Restructuring charges												0
Other noninterest expense										15,384		14,845		13,732
Intersegment (revenue) expense*										688		612		585
Income before income taxes										7,500		7,201		6,724
Income taxes										1,392		1,913		2,597
Net income										6,108		5,288		4,127
Total assets		44,591				39,090				44,591		39,090
Capital expenditures										84		45		38
Insurance [Member]
Segment Reporting Information [Line Items]
Interest income										0		0		0
Interest expense										0		0		0
Net interest income	[1]									0		0		0
Provision for loan and lease losses										0		0		0
Noninterest income										17,318		16,442		15,320
Intangible expenses										296		474		401
Restructuring charges												0
Other noninterest expense										12,181		12,419		11,667
Intersegment (revenue) expense*										516		501		474
Income before income taxes										4,325		3,048		2,778
Income taxes										443		752		374
Net income										3,882		2,296		2,404
Total assets		34,291				30,117				34,291		30,117
Capital expenditures										104		30		222
Other Segments [Member]
Segment Reporting Information [Line Items]
Interest income										32		31		25
Interest expense										5,043		5,043		5,037
Net interest income	[1]									(5,011)		(5,012)		(5,012)
Provision for loan and lease losses										0		0		0
Noninterest income										410		(263)		375
Intangible expenses										0		0		0
Restructuring charges												0
Other noninterest expense										1,531		291		2,062
Intersegment (revenue) expense*										0		0		0
Income before income taxes										(6,132)		(5,566)		(6,699)
Income taxes										(1,360)		(1,607)		(989)
Net income										(4,772)		(3,959)		(5,710)
Total assets		$ 19,537				$ 19,408				19,537		19,408
Capital expenditures										$ 372		$ 201		$ 612

[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 FASB ASC 606 "Revenue from Contracts with Customers" (FASB ASC 606). Noninterest income streams that are out of scope of FASB ASC 606 include bank owned life insurance income, sales of investment securities and mortgage banking activities.