Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
ASSETS
Cash and due from banks	$ 98,399	$ 39,857
Interest-earning deposits with other banks	47,713	67,520
Investment securities held-to-maturity (fair value $71,327 and $45,639 at December 31, 2012 and 2011, respectively)	69,845	45,804
Investment securities available-for-sale	429,734	425,361
Loans held for sale	4,530	3,157
Loans and leases held for investment	1,481,862	1,446,406
Less: Reserve for loan and lease losses	(24,746)	(29,870)
Net loans and leases held for investment	1,457,116	1,416,536
Premises and equipment, net	33,222	34,303
Goodwill	56,238	53,169
Other intangibles, net of accumulated amortization and fair value adjustments of $10,475 and $11,646 at December 31, 2012 and 2011, respectively	6,456	4,870
Bank owned life insurance	61,409	61,387
Accrued interest receivable and other assets	40,179	54,875
Total assets	2,304,841	2,206,839
LIABILITIES
Demand deposits, noninterest-bearing	368,948	304,006
Demand deposits, interest-bearing	638,483	547,034
Savings deposits	526,391	489,692
Time deposits	331,511	408,500
Total deposits	1,865,333	1,749,232
Customer repurchase agreements	96,282	109,740
Accrued interest payable and other liabilities	37,955	47,394
Long-term debt		5,000
Subordinated notes	375	1,875
Junior subordinated debt owed to unconsolidated subsidiary trust	20,619	20,619
Total liabilities	2,020,564	1,933,860
SHAREHOLDERS' EQUITY
Common stock, $5 par value; 48,000,000 shares authorized at December 31, 2012 and 2011; 18,266,404 shares issued at December 31, 2012 and and 2011; and 16,770,232 and 16,702,376 shares outstanding at December 31, 2012 and 2011, respectively	91,332	91,332
Additional paid-in capital	62,101	58,495
Retained earnings	164,823	157,566
Accumulated other comprehensive loss, net of tax benefit	(6,920)	(6,101)
Treasury stock, at cost; 1,496,172 shares and 1,564,028 shares at December 31, 2012 and 2011, respectively	(27,059)	(28,313)
Total shareholders' equity	284,277	272,979
Total liabilities and shareholders' equity	$ 2,304,841	$ 2,206,839