Consolidated Balance Sheets (Current Period Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Cash and due from banks	$ 35,993	$ 38,944
Interest-bearing deposits with other banks	165,988	112,886
Securities available for sale (at estimated fair value; pledged: $181,642 in 2013 and $174,240 in 2012)	277,947	296,837
Securities held to maturity (pledged: $146,926 in 2013 and $136,109 in 2012) (estimated fair value: $401,016 in 2013 and $403,218 in 2012)	387,114	386,408
Total investment securities	665,061	683,245
Loans held for sale, net	75,857	121,237
Loans held in portfolio, net of unearned discounts	1,680,389	1,649,753
Less allowance for loan losses	22,520	22,347
Loans, net	1,657,869	1,627,406
Federal Reserve and Federal Home Loan Bank stock, at cost	7,456	7,472
Goodwill	22,901	22,901
Premises and equipment, net	21,998	22,578
Other real estate	1,917	1,452
Accrued interest receivable	7,198	6,853
Cash surrender value of life insurance policies	54,945	54,553
Other assets	55,302	51,315
Total assets	2,772,485	2,750,842
Deposits
Noninterest-bearing demand deposits	897,112	924,351
Savings, NOW and money market deposits	793,364	701,692
Time deposits	590,679	642,041
Total deposits	2,281,155	2,268,084
Commercial paper	20,995	15,345
Advances - FHLB	100,894	101,265
Long-term borrowings - subordinated debentures	25,774	25,774
Total borrowings	181,480	175,334
Accrued interest payable	735	649
Accrued expenses and other liabilities	77,123	78,685
Total liabilities	2,540,493	2,522,752
Common stock, $1 par value. Authorized 100,000,000 shares; issued 35,263,768 shares	35,264	35,264
Capital surplus	271,651	271,565
Retained earnings	26,866	24,407
Accumulated other comprehensive loss	(15,134)	(16,491)
Common shares in treasury at cost, 4,307,972 shares	(86,655)	(86,655)
Total shareholders' equity	231,992	228,090
Total liabilities and shareholders' equity	2,772,485	2,750,842
Dealers [Member]
Deposits
Securities sold under agreements to repurchase - customers	$ 33,817	$ 32,950