Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Interest, fee, and dividend income
Interest and fees on loans and leases	$ 62,031	$ 50,509	$ 115,726	$ 100,717
Securities available for sale	6,537	7,108	12,283	14,474
Securities held to maturity	548	617	1,073	1,257
Other	488	413	891	805
Total interest, fee, and dividend income	69,604	58,647	129,973	117,253
Interest expense
Deposits	4,296	4,834	8,446	9,977
Short-term borrowings	67	48	109	89
Long-term debt	3,026	3,580	6,635	7,161
Trust preferred debentures	560	434	988	883
Total interest expense	7,949	8,896	16,178	18,110
Net interest income	61,655	49,751	113,795	99,143
Provision for loan and lease losses	6,402	4,103	12,060	8,574
Net interest income after provision for loan and lease losses	55,253	45,648	101,735	90,569
Noninterest income
Insurance and other financial services revenue	5,755	5,279	12,648	11,433
Service charges on deposit accounts	4,933	4,571	9,256	8,912
ATM and debit card fees	4,044	3,063	7,286	6,025
Retirement plan administration fees	2,957	2,411	5,639	4,744
Trust	4,699	2,312	7,612	4,441
Bank owned life insurance	886	618	1,735	1,589
Net securities (losses) gains	(61)	97	1,084	552
Other	2,324	2,331	5,506	6,042
Total noninterest income	25,537	20,682	50,766	43,738
Noninterest expense
Salaries and employee benefits	29,160	24,992	56,207	51,717
Occupancy	5,219	4,222	10,196	8,713
Data processing and communications	3,854	3,431	7,309	6,689
Professional fees and outside services	3,237	2,388	6,138	5,113
Equipment	2,910	2,409	5,492	4,789
Office supplies and postage	1,656	1,574	3,246	3,245
FDIC expenses	1,273	942	2,403	1,873
Advertising	1,000	805	1,723	1,607
Amortization of intangible assets	1,351	841	2,202	1,660
Loan collection and other real estate owned	421	799	1,139	1,437
Merger expenses	1,269	826	11,950	1,337
Other	5,100	4,161	9,150	7,684
Total noninterest expense	56,450	47,390	117,155	95,864
Income before income tax expense	24,340	18,940	35,346	38,443
Income tax expense	7,424	5,683	10,781	11,536
Net income	$ 16,916	$ 13,257	$ 24,565	$ 26,907
Earnings per share
Basic (in dollars per share)	$ 0.39	$ 0.40	$ 0.61	$ 0.81
Diluted (in dollars per share)	$ 0.38	$ 0.40	$ 0.61	$ 0.80