CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Operating activities:
Net income	$ 10,558	$ 8,476
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,012	1,936
Net OTTI recognized in earnings	0	64
Provision for loan and lease losses	78	664	3,649
Share based compensation expense	318	325
Deferred income tax expense	1,111	1,641
Origination of loans held for sale	(97,722)	(55,278)
Proceeds from sales of loans held for sale	87,010	63,474
Gains on sales of loans held for sale	(1,522)	(981)
Loss on sales of other real estate owned	123	334
Investment securities gains	(56)	(73)
(Gains) losses on sales of premises and equipment	0	(93)
Net decrease (increase) in accrued interest receivable	(534)	474
Net (increase) decrease in other assets	3,198	1,923
Net decrease in accrued expenses and other liabilities	(232)	(2,104)
Other - net	1,940	1,717
Net cash provided by operating activities	6,282	22,499
Investing activities:
Purchases of other equity securities	0	(620)
Purchases of investments held-to-maturity	0	(11,032)
Purchases of investments available-for-sale	(11,470)	(46,331)
Net proceeds from redemption of Federal Home Loan Bank of Atlanta stock	2,399	0
Proceeds from sales of investment available-for-sale	0	28,519
Proceeds from maturities, calls and principal payments of investments held-to-maturity	4,269	35,920
Proceeds from maturities, calls and principal payments of investments available-for-sale	66,715	88,220
Net increase in loans and leases	(35,822)	(38,396)
Proceeds from the sales of other real estate owned	731	1,110
Expenditures for premises and equipment	(551)	(1,301)
Net cash used in investing activities	26,271	56,089
Financing activities:
Net increase in deposits	6,174	24,555
Net (decrease) increase in retail repurchase agreements and federal funds purchased	(36,627)	(70,483)
Repayment of advances from FHLB	(58)	(87)
Proceeds from issuance of common stock	(343)	(225)
Tax benefits associated with shared based compensation	0	74
Dividends paid	(3,519)	(2,431)
Net cash provided by financing activities	(34,373)	(48,597)
Net increase in cash and cash equivalents	(1,820)	29,991
Cash and cash equivalents at beginning of period	86,406	72,314	72,314
Cash and cash equivalents at end of period	84,586	102,305	86,406
Supplemental Disclosures:
Interest payments	5,189	5,940
Income tax payments	0	1,356
Transfers from loans to other real estate owned	$ 92	$ 1,667