CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest income
Loans, including fees	$ 78,490	$ 77,095	$ 83,934
Securities
Taxable	12,366	11,873	12,510
Tax exempt	11,862	12,247	12,160
Other interest income	97	64	164
Total interest income	102,815	101,279	108,768
Interest expense
Deposits	3,678	4,927	7,637
Federal Home Loan Bank advances	3,572	3,307	5,120
Subordinated debentures	1,286	1,675	1,825
Other borrowings	71	70	104
Total interest expense	8,607	9,979	14,686
Net interest income	94,208	91,300	94,082
Provision for loan losses	1,500	4,534	9,850
Net interest income after provision for loan losses	92,708	86,766	84,232
Non-interest income
Service charges on deposit accounts	20,698	20,427	19,815
Interchange income	7,590	7,056	6,540
Mortgage banking	6,754	6,799	9,927
Trust and investment product fees	4,712	4,756	3,650
Increase in cash surrender value of life insurance	1,298	1,378	1,206
Net realized gains/(losses) on securities (includes $24, $835, and $1,867 accumulated other comprehensive income (AOCI) reclassifications for realized net gains on available for sale securities)	24	835	1,867
(Loss) on sale and write-down of OREO	(153)	(539)	(1,359)
Other-than-temporary gain/(loss)
Total impairment (loss)			(500)
Net impairment (loss) recognized in earnings			(500)
Other income	2,364	2,417	2,745
Total non-interest income	43,287	43,129	43,891
Non-interest expense
Salaries and employee benefits	54,132	52,165	48,990
Net occupancy	7,628	7,139	6,769
Equipment	10,337	9,931	8,564
Intangibles amortization	1,690	1,868	1,835
Telecommunications	1,747	1,796	1,729
Stationery printing and supplies	1,174	1,190	1,337
FDIC assessment	1,620	1,711	2,495
Marketing	3,187	3,660	4,397
Collection expense	1,330	3,300	3,768
Prepayment penalty on FHLB advance		2,239	1,313
Bank acquisition expense	3,119
Consultant expense	1,400	1,582	1,150
Interchange expense	2,287	1,918	1,591
Other expenses	9,569	9,732	10,900
Total non-interest expense	99,220	98,231	94,838
Income before income tax	36,775	31,664	33,285
Income tax expense (includes $8, $284, and $635 income tax expense from AOCI reclassification items)	7,779	5,319	6,027
Net income	28,996	26,345	27,258
Preferred dividends and discount accretion		(504)	(2,110)
Redemption of preferred stock	0	(148)	1,357
Net income attributable to common shareholders	$ 28,996	$ 25,693	$ 26,505
Net income per common share:
Basic (in dollars per share)	$ 1.40	$ 1.26	$ 1.31
Diluted (in dollars per share)	$ 1.39	$ 1.26	$ 1.30