Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets
Cash and due from banks	$ 142,570	$ 157,094
Short-term interest bearing accounts	1,117	6,574
Securities available for sale, at fair value	1,390,403	1,147,999
Securities held to maturity (fair value $121,069 and $61,535, respectively)	122,302	60,563
Trading securities	5,092	3,918
Federal Reserve and Federal Home Loan Bank stock	43,491	29,920
Loans and leases	5,290,710	4,277,616
Less allowance for loan and lease losses	71,184	69,334
Net loans and leases	5,219,526	4,208,282
Premises and equipment, net	87,811	77,875
Goodwill	264,376	152,373
Intangible assets, net	28,204	16,962
Bank owned life insurance	112,907	80,702
Other assets	116,719	99,997
Total assets	7,534,518	6,042,259
Liabilities
Demand (noninterest bearing)	1,516,385	1,242,712
Savings, NOW, and money market	3,256,753	2,558,376
Time	1,105,038	983,261
Total deposits	5,878,176	4,784,349
Short-term borrowings	385,611	162,941
Long-term debt	309,111	367,492
Trust preferred debentures	101,196	75,422
Other liabilities	68,849	69,782
Total liabilities	6,742,943	5,459,986
Stockholders' equity
Preferred stock, $0.01 par value. Authorized 2,500,000 shares at June 30, 2013 and December 31, 2012	0	0
Common stock, $0.01 par value. Authorized 100,000,000 shares at June 30, 2013 and December 31, 2012; issued 49,651,494 at June 30, 2013 and 39,305,131 at December 31, 2012	497	393
Additional paid-in-capital	572,359	346,692
Retained earnings	366,555	357,558
Accumulated other comprehensive loss	(21,586)	(5,880)
Common stock in treasury, at cost, 6,116,825 and 5,529,781 shares at June 30, 2013 and December 31, 2012, respectively	(126,250)	(116,490)
Total stockholders' equity	791,575	582,273
Total liabilities and stockholders' equity	$ 7,534,518	$ 6,042,259