Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest income
Interest on loans	$ 47,019	$ 44,251	$ 141,717	$ 131,142
Taxable interest and dividends on securities	3,763	3,995	10,798	12,938
Nontaxable interest and dividends on securities	10	20	32	72
Interest on loans held for sale	156	255	661	541
Interest on federal funds sold	79	34	134	85
Total interest and dividend income	51,027	48,555	153,342	144,778
Interest expense
Interest on deposits	2,649	2,619	7,857	8,045
Interest on borrowings	3,182	3,098	9,812	9,413
Total interest expense	5,831	5,717	17,669	17,458
Net interest income	45,196	42,838	135,673	127,320
Provision for loan losses	2,650	3,606	7,050	13,706
Net interest income after provision for loan losses	42,546	39,232	128,623	113,614
Noninterest income
Deposit account fees	4,604	3,959	13,164	11,771
Interchange and ATM fees	2,845	2,422	7,934	7,189
Gains (Losses) on Extinguishment of Debt	763	0	763	0
Investment management	4,175	3,723	12,417	11,113
Mortgage banking income	1,843	1,445	5,794	4,238
Increase in cash surrender value of life insurance policies	793	757	2,325	2,211
Proceeds from death benefits on life insurance policies	0	1,307	0	1,307
Loan level derivative income	1,331	1,047	2,679	2,747
Other noninterest income	1,776	1,448	5,469	4,424
Total noninterest income	18,130	16,108	50,545	45,000
Noninterest expenses
Salaries and employee benefits	22,654	20,704	66,963	61,915
Occupancy and equipment expenses	4,573	4,218	14,742	12,752
Data processing & facilities management	1,179	1,144	3,564	3,418
Consulting expense	914	691	2,291	1,900
FDIC assessment	898	775	2,653	2,354
Advertising expense	759	1,267	3,410	3,478
Debit Card Expense	766	648	2,209	1,844
Software Maintenance	599	491	1,878	1,467
Telecommunication expense	523	479	1,726	1,763
Business Combination, Acquisition Related Costs	366	595	2,465	1,267
Goodwill impairment		2,227		2,227
Other noninterest expenses	7,491	6,813	23,904	20,025
Total noninterest expenses	40,722	40,052	125,805	114,410
Income before income taxes	19,954	15,288	53,363	44,204
Provision for income taxes	5,299	3,687	13,698	11,546
Net income	$ 14,655	$ 11,601	$ 39,665	$ 32,658
Basic earnings per share (in dollars per share)	$ 0.64	$ 0.54	$ 1.73	$ 1.51
Diluted earnings per share (in dollars per share)	$ 0.64	$ 0.53	$ 1.73	$ 1.51
Weighted average common shares (basic) (in shares)	22,946,308	21,654,188	22,886,521	21,613,157
Common shares equivalents (in shares)	100,806	52,116	72,799	31,300
Weighted average common shares (diluted) (in shares)	23,047,114	21,706,304	22,959,320	21,644,457
Cash dividends declared per common share (in dollars per share)	$ 0.22	$ 0.21	$ 0.66	$ 0.63