Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest Income:
Interest and fees on loans	$ 93,845	$ 87,155	$ 61,541
Interest and dividends on taxable investment securities	18,423	18,051	16,840
Interest on tax-exempt investment securities	3,126	2,992	1,810
Other interest income	50	135	9
Total interest income	115,444	108,333	80,200
Interest Expense:
Interest on deposits	5,942	6,206	6,106
Interest on short-term borrowings	508	182	146
Interest on long-term borrowings	4,129	4,333	4,442
Total interest expense	10,579	10,721	10,694
Net interest income	104,865	97,612	69,506
Provision for loan losses	3,539	14,097	339
Net interest income after provision for loan losses	101,326	83,515	69,167
Other Income:
Insurance income	13,846	13,783	13,604
Deposit account service charges	10,662	10,845	9,173
Trust and investment income	10,589	9,577	7,685
Electronic banking income	10,353	8,958	6,642
Bank owned life insurance income	1,414	598	106
Mortgage banking income	1,304	1,317	1,237
Commercial loan swap fee income	1,076	565	450
Net gain on investment securities	930	729	398
Net loss on asset disposals and other transactions	(1,133)	(1,788)	(431)
Other non-interest income	1,826	1,798	1,156
Total other income	50,867	46,382	40,020
Other Expenses:
Salaries and employee benefit costs	57,433	59,216	46,593
Net occupancy and equipment expense	10,735	11,207	7,839
Professional fees	7,436	7,295	5,649
Electronic banking expense	5,992	5,300	4,529
Amortization of other intangible assets	4,030	4,077	1,428
Data processing and software expense	3,763	3,671	2,424
Marketing expense	1,594	2,838	2,299
Communication expense	2,261	2,286	1,642
FDIC insurance expense	1,899	2,084	1,260
Franchise tax expense	2,192	1,968	1,392
Foreclosed real estate and other loan expenses	859	1,276	789
Other non-interest expense	8,717	13,863	9,165
Total other expenses	106,911	115,081	85,009
Income before income taxes	45,282	14,816	24,178
Income tax expense	14,125	3,875	7,494
Net income	$ 31,157	$ 10,941	$ 16,684
Earnings per common share - basic	$ 1.72	$ 0.62	$ 1.36
Earnings per common share - diluted	$ 1.71	$ 0.61	$ 1.35
Weighted-average number of common shares outstanding - basic	18,013,693	17,555,140	12,183,352
Weighted-average number of common shares outstanding - diluted	18,155,463	17,687,795	12,306,224