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 held for investment	$ 87,632	$ 95,492	$ 96,600
Interest on securities - taxable	4,225	5,975	7,875
Interest on securities - nontaxable	3,978	4,350	4,790
Interest on deposits in banks	267	291	211
Total interest income	96,102	106,108	109,476
Interest Expense
Interest on deposits	5,878	7,308	8,823
Interest on short-term borrowings	1,952	2,024	2,222
Interest on long-term debt	3,519	5,958	6,789
Total interest expense	11,349	15,290	17,834
Net interest income	84,753	90,818	91,642
Provision for loan losses	2,191	145	8,208
Net interest income after provision for loan losses	82,562	90,673	83,434
Noninterest Income
Wealth management	2,975	3,030	3,412
Service charges on deposit accounts	13,717	13,828	13,558
Other service charges and fees	8,045	7,581	7,151
Insurance commissions	6,899	6,555	5,933
Impairment losses on securities		(737)	(320)
Portion of losses recognized in other comprehensive income	0	0	0
Net impairment losses recognized in earnings		(737)	(320)
Net gain (loss) on sale of securities	144	(1,385)	399
Net FDIC indemnification asset amortization	(6,379)	(3,979)	(5,597)
Net gain on branch divestiture		755
Other operating income	4,129	4,355	5,235
Total noninterest income	29,530	30,003	29,771
Noninterest Expense
Salaries and employee benefits	39,625	40,713	41,235
Occupancy expense of bank premises	5,817	6,338	7,033
Furniture and equipment	5,199	4,952	4,966
Amortization of intangible assets	1,118	787	729
FDIC premiums and assessments	1,513	1,672	1,717
FHLB debt prepayment fees	1,702	5,008
Merger, acquisition, and divestiture expense	86	1,150	57
Other operating expense	21,111	22,242	23,248
Total noninterest expense	76,171	82,862	78,985
Income before income taxes	35,921	37,814	34,220
Income tax expense	11,381	12,324	10,908
Net income	24,540	25,490	23,312
Dividends on preferred stock	105	910	1,024
Net income available to common shareholders	$ 24,435	$ 24,580	$ 22,288
Basic earnings per common share	$ 1.32	$ 1.34	$ 1.13
Diluted earnings per common share	1.31	1.31	1.11
Cash dividends per common share	$ 0.54	$ 0.50	$ 0.48
Weighted average basic shares outstanding	18,531,039	18,406,363	19,792,099
Weighted average diluted shares outstanding	18,727,464	19,483,054	20,961,800