CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
ASSETS
Cash and due from banks	$ 196,547	$ 213,103
Interest-bearing deposits with banks	1,660,988	1,732,045
Federal funds sold		700
Securities (fair value: $527,735 and $562,815, respectively)	527,627	562,542
Loans:
Total loans (net of unearned interest)	3,387,146	3,242,427
Allowance for loan losses	(39,034)	(38,725)
Loans, net	3,348,112	3,203,702
Premises and equipment, net	117,862	115,503
Other real estate owned	8,149	9,227
Intangible assets, net	10,273	12,083
Goodwill	44,545	44,545
Accrued interest receivable and other assets	124,871	128,800
Total assets	6,038,974	6,022,250
Deposits:
Noninterest-bearing	2,085,753	2,016,832
Interest-bearing	3,333,766	3,423,998
Total deposits	5,419,519	5,440,830
Short-term borrowings	4,590	4,571
Long-term borrowings	6,938	9,178
Accrued interest payable and other liabilities	24,126	21,300
Junior subordinated debentures	26,804	26,804
Total liabilities	5,481,977	5,502,683
Commitments and contingent liabilities (Note 19)
Stockholders' equity:
Common stock, $1.00 par; 20,000,000 shares authorized; shares issued and outstanding: 15,333,622 and 15,242,308, respectively	15,334	15,242
Capital surplus	88,803	82,401
Retained earnings	448,953	415,607
Accumulated other comprehensive income, net of income tax of $2,103 and $3,400, respectively	3,907	6,317
Total stockholders' equity	556,997	519,567
Total liabilities and stockholders' equity	6,038,974	6,022,250
Senior preferred stock [Member]
Stockholders' equity:
preferred stock, value
Cumulative preferred stock [Member]
Stockholders' equity:
preferred stock, value