Consolidated Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
ASSETS
Cash and due from banks, including interest bearing amounts of $56,571 and $33,889, respectively	$ 178,263	$ 125,605	$ 157,243
Securities:
Available-for-sale, at fair value	993,270	1,021,244
Held-to-maturity (fair values of $624,627 and $639,273, respectively)	592,033	602,509
Total securities	1,585,303	1,623,753
Loans held for sale	14,299	21,903
Portfolio loans, net of unearned income	3,683,801	3,687,762
Allowance for loan losses	(51,664)	(52,699)	(54,395)
Net portfolio loans	3,632,137	3,635,063
Premises and equipment, net	90,879	88,866
Accrued interest receivable	19,909	19,354
Goodwill and other intangible assets, net	323,003	324,465
Bank-owned life insurance	118,666	119,671
Other assets	122,989	120,037
Total Assets	6,085,448	6,078,717
Deposits:
Non-interest bearing demand	888,109	874,923
Interest bearing demand	870,067	831,368
Money market	849,401	847,805
Savings deposits	766,265	740,568
Certificates of deposit	1,632,360	1,649,620
Total deposits	5,006,202	4,944,284
Federal Home Loan Bank borrowings	60,767	111,187
Other short-term borrowings	128,372	142,971
Junior subordinated debt owed to unconsolidated subsidiary trusts	106,109	113,832
Total borrowings	295,248	367,990
Accrued interest payable	3,620	3,856
Other liabilities	55,969	48,403
Total Liabilities	5,361,039	5,364,533
SHAREHOLDERS' EQUITY
Preferred stock, no par value; 1,000,000 shares authorized; none outstanding
Common stock, $2.0833 par value; 50,000,000 shares authorized; 29,214,018 and 29,214,660 shares issued in 2013 and 2012; outstanding: 29,214,018 and 29,214,660 shares in 2013 and 2012, respectively	60,862	60,863
Capital surplus	241,880	241,672
Retained earnings	429,715	419,246
Treasury stock (0 shares in 2013 and 2012, respectively, at cost)
Accumulated other comprehensive income (loss)	(6,806)	(6,365)	(326)
Deferred benefits for directors	(1,242)	(1,232)
Total Shareholders' Equity	724,409	714,184	642,001
Total Liabilities and Shareholders' Equity	$ 6,085,448	$ 6,078,717