CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
ASSETS
Cash and due from banks	$ 106,249	$ 134,502
Interest-bearing deposits with other banks	1,170	24,341
Investment securities available-for-sale, at market value (cost $942,999 at March 31, 2013 and $1,017,104 at December 31, 2012)	952,039	1,032,096
Investment securities held-to-maturity (market value $723,226 at March 31, 2013 and $778,474 at December 31, 2012)	716,214	770,755
Other investments	75,375	71,492
Loans held for sale	28,126	16,256
Loans
Commercial	892,381	861,033
Real estate-construction	87,542	73,517
Real estate-commercial	1,433,182	1,417,008
Real estate-residential	330,260	318,210
Installment	53,509	56,810
Home equity	365,943	367,500
Credit card	32,465	34,198
Lease financing	53,556	50,788
Total loans, excluding covered loans	3,248,838	3,179,064
Less: Allowance for loan and lease losses - uncovered	48,306	47,777
Net loans - excluding covered loans	3,200,532	3,131,287
Covered loans	687,798	748,116
Less: Allowance for loan and lease losses - covered	45,496	45,190
Net loans - covered	642,302	702,926
Net loans	3,842,834	3,834,213
Premises and equipment	146,889	146,716
Goodwill	95,050	95,050
Other intangibles	7,078	7,648
FDIC indemnification asset	112,428	119,607
Accrued interest and other assets	265,565	244,372
Total assets	6,349,017	6,497,048
Deposits
Interest-bearing	1,113,940	1,160,815
Savings	1,620,874	1,623,614
Time	1,030,124	1,068,637
Total interest-bearing deposits	3,764,938	3,853,066
Noninterest-bearing	1,056,409	1,102,774
Total deposits	4,821,347	4,955,840
Federal funds purchased and securities sold under agreements to repurchase	130,863	122,570
Federal Home Loan Bank short-term borrowings	502,200	502,000
Total short-term borrowings	633,063	624,570
Long-term debt	74,498	75,202
Total borrowed funds	707,561	699,772
Accrued interest and other liabilities	118,495	131,011
Total liabilities	5,647,403	5,786,623
SHAREHOLDERS' EQUITY
Common stock - no par value Authorized - 160,000,000 shares Issued - 68,730,731 shares in 2013 and 2012	575,514	579,293
Retained earnings	327,635	330,004
Accumulated other comprehensive loss	(21,475)	(18,677)
Treasury stock, at cost, 10,701,808 shares in 2013 and 10,684,496 shares in 2012	(180,060)	(180,195)
Total shareholders' equity	701,614	710,425
Total liabilities and shareholders' equity	$ 6,349,017	$ 6,497,048