Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Cash and due from banks	$ 7,123	$ 7,439	$ 5,838
Federal funds sold	5,811	7,852	18,990
Interest bearing deposits with banks and other short-term investments	257,957	324,043	117,326
Investment securities available for sale, at fair value	318,431	299,820	345,021
Federal Reserve and Federal Home Loan Bank stock	11,154	10,694	11,374
Loans held for sale	132,698	226,923	87,496
Loans	2,548,024	2,493,095	2,186,940
Less allowance for credit losses	(38,811)	(37,492)	(31,875)
Loans, net	2,509,213	2,455,603	2,155,065
Premises and equipment, net	16,094	15,261	12,864
Deferred income taxes	20,661	19,128	14,658
Bank owned life insurance	14,229	14,135	13,839
Intangible assets, net	3,659	3,785	4,066
Other real estate owned	9,199	5,299	3,014
Other assets	18,636	19,459	25,998
Total Assets	3,324,865	3,409,441	2,815,549
Liabilities
Noninterest bearing demand	756,177	881,390	698,636
Interest bearing transaction	99,187	113,813	75,751
Savings and money market	1,456,318	1,374,869	1,084,622
Time, $100,000 or more	216,337	232,875	293,570
Other time	284,911	294,275	215,656
Total deposits	2,812,930	2,897,222	2,368,235
Customer repurchase agreements	92,664	101,338	111,580
Long-term borrowings	39,300	39,300	49,300
Other liabilities	18,119	21,605	10,426
Total Liabilities	2,963,013	3,059,465	2,539,541
Shareholders' Equity
Common stock, par value $.01 per share; shares authorized 50,000,000, shares issued and outstanding 23,389,238, 22,954,889 and 20,220,166, respectively	228	226	199
Warrant	946	946	946
Additional paid in capital	181,993	180,593	134,455
Retained earnings	117,577	106,146	78,911
Accumulated other comprehensive income	4,508	5,465	4,897
Total Shareholders' Equity	361,852	349,976	276,008
Total Liabilities and Shareholders' Equity	3,324,865	3,409,441	2,815,549
Series B Preferred Stock [Member]
Shareholders' Equity
Preferred stock, par value $.01 per share, shares authorized 1,000,000, Series B, $1,000 per share liquidation preference, shares issued and outstanding 56,600 at March 31, 2013, December 31, 2012 and March 31, 2012.	$ 56,600	$ 56,600	$ 56,600