Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest Income
Interest and fees on loans	$ 42,944	$ 36,872	$ 128,397	$ 104,082
Interest and dividends on investment securities:
Taxable	6,044	4,216	17,465	12,314
Tax-exempt	722	701	2,257	2,114
Interest on deposits in depository institutions	271	940	1,034	1,043
Total Interest Income	49,981	42,729	149,153	119,553
Interest Expense
Interest on deposits	8,585	5,497	24,768	14,741
Interest on short-term borrowings	814	1,435	2,729	2,354
Interest on long-term debt	45	239	140	680
Total Interest Expense	9,444	7,171	27,637	17,775
Net Interest Income	40,537	35,558	121,516	101,778
Provision for (recovery of) loan losses	274	(27)	(1,175)	(1,910)
Net Interest Income After Provision for (Recovery of) Loan Losses	40,263	35,585	122,691	103,688
Non-Interest Income
(Losses) gains on sale of investment securities, net	(40)	0	69	0
Unrealized (losses) gains recognized on equity securities still held	(214)	384	(27)	1,155
Bank owned life insurance	762	813	2,910	2,356
Other income	765	702	3,139	2,227
Total Non-Interest Income	16,698	15,753	50,447	45,856
Non-Interest Expense
Salaries and employee benefits	15,210	13,576	46,220	40,459
Occupancy related expense	2,725	2,323	8,055	7,073
Equipment and software related expense	2,248	1,965	6,662	5,691
FDIC insurance expense	0	315	639	943
Advertising	861	808	2,650	2,444
Bankcard expenses	1,554	1,134	4,270	3,274
Postage, delivery, and statement mailings	659	537	1,828	1,630
Office supplies	382	364	1,167	1,006
Legal and professional fees	539	453	1,665	1,378
Telecommunications	569	408	1,892	1,349
Gains (Losses) on Sales of Other Real Estate	(59)	156	410	638
Merger related costs	0	242	797	242
Other expenses	3,709	2,759	12,326	8,765
Total Non-Interest Expense	28,397	25,040	88,581	74,892
Income Before Income Taxes	28,564	26,298	84,557	74,652
Income tax expense	6,193	5,606	17,816	15,369
Net Income Available to Common Shareholders	22,371	20,692	66,741	59,283
Total Comprehensive Income	$ 28,678	$ 16,367	$ 92,618	$ 44,307
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Average common shares outstanding, basic (in shares)	16,271	15,340	16,350	15,360
Effect of dilutive securities (in shares)	18	18	18	20
Average common shares outstanding, diluted (in shares)	16,289	15,358	16,368	15,380
Earnings Per Share [Abstract]
Basic earnings per common share (in dollars per share)	$ 1.36	$ 1.34	$ 4.05	$ 3.82
Diluted earnings per common share (in dollars per share)	$ 1.36	$ 1.33	$ 4.04	$ 3.82
Service charges
Non-Interest Income
Revenue from contract with customer	$ 8,183	$ 7,598	$ 23,281	$ 21,783
Bankcard revenue
Non-Interest Income
Revenue from contract with customer	5,440	4,677	15,931	13,543
Trust and investment management fee income
Non-Interest Income
Revenue from contract with customer	$ 1,802	$ 1,579	$ 5,144	$ 4,792