Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest Income:
Interest and fees on loans	$ 87,155	$ 61,541	$ 48,522
Interest and dividends on taxable investment securities	18,051	16,840	16,853
Interest on tax-exempt investment securities	2,992	1,810	1,600
Other interest income	135	9	96
Total interest income	108,333	80,200	67,071
Interest Expense:
Interest on deposits	6,206	6,106	7,052
Interest on short-term borrowings	182	146	114
Interest on long-term borrowings	4,333	4,442	4,520
Total interest expense	10,721	10,694	11,686
Net interest income	97,612	69,506	55,385
Provision for (recovery of) loan losses	14,097	339	(4,410)
Net interest income after provision for (recovery of) loan losses	83,515	69,167	59,795
Other Income:
Insurance income	13,783	13,604	12,201
Deposit account service charges	10,845	9,173	8,764
Trust and investment income	9,577	7,685	7,122
Electronic banking income	8,958	6,642	6,191
Mortgage banking income	1,317	1,237	1,759
Net gain on investment securities	729	398	489
Net loss on asset disposals and other transactions	(1,788)	(431)	(155)
Other non-interest income	2,961	1,712	1,183
Total other income	46,382	40,020	37,554
Other Expenses:
Salaries and employee benefit costs	59,216	46,593	36,472
Net occupancy and equipment expense	11,207	7,839	6,840
Professional fees	7,295	5,649	4,207
Electronic banking expense	5,300	4,529	3,586
Amortization of other intangible assets	4,077	1,428	807
Data processing and software expense	3,671	2,424	2,012
Marketing expense	2,838	2,299	2,301
Communication expense	2,286	1,642	1,339
FDIC insurance expense	2,084	1,260	1,036
Franchise tax expense	1,968	1,392	1,643
Foreclosed real estate and other loan expenses	1,276	789	654
Other non-interest expense	13,863	9,165	7,368
Total other expenses	115,081	85,009	68,265
Income before income taxes	14,816	24,178	29,084
Income tax expense	3,875	7,494	11,510
Net income	$ 10,941	$ 16,684	$ 17,574
Earnings per common share - basic	$ 0.62	$ 1.36	$ 1.65
Earnings per common share - diluted	$ 0.61	$ 1.35	$ 1.63
Weighted-average number of common shares outstanding - basic	17,555,140	12,183,352	10,581,222
Weighted-average number of common shares outstanding - diluted	17,687,795	12,306,224	10,679,417