Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Operating activities:
Net income	$ 26,673	$ 26,844
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,844	5,566
Net OTTI recognized in earnings	95	160
Provision (credit) for loan and lease losses	2,481	(854)	1,428
Share based compensation expense	1,132	942
Deferred income tax expense	2,315	5,369
Origination of loans held for sale	(221,288)	(155,965)
Proceeds from sales of loans held for sale	210,085	157,774
Gains on sales of loans held for sale	(3,340)	(2,188)
Loss on sales of other real estate owned	861	1,453
Investment securities gains	(459)	(283)
(Gains) losses on sales of premises and equipment	(93)	18
Net increase in accrued interest receivable	85	188
Net (increase) decrease in other assets	(1,681)	10,080
Net increase in accrued expenses and other liabilities	2,505	3,864
Other - net	7,315	5,656
Net cash provided by operating activities	32,530	58,624
Investing activities:
Purchases of other equity securities	(2,956)	0
Purchases of investments held-to-maturity	(132,097)	(121,767)
Purchases of investments available-for-sale	(198,123)	(300,627)
Proceeds from redemption of Federal Home Loan Bank of Atlanta stock	4,174	1,485
Proceeds from sales of investment available-for-sale	28,519	0
Proceeds from maturities, calls and principal payments of investments held-to-maturity	103,789	34,042
Proceeds from maturities, calls and principal payments of investments available-for-sale	286,607	277,035
Net increase in loans and leases	(74,008)	(6,492)
Proceeds from the sales of other real estate owned	3,102	5,338
Acquisition of business activity, net of cash acquired	(849)	0
Expenditures for premises and equipment	(3,675)	(3,087)
Net cash used in investing activities	14,483	(114,073)
Financing activities:
Net increase in deposits	53,821	90,452
Net decrease in retail repurchase agreements and federal funds purchased	(85,307)	(16,714)
Repayment of advances from FHLB	(40,262)	(262)
Proceeds from FHLB advances	40,000
Proceeds from issuance of common stock	(21)	205
Repurchase of common stock	0	(334)
Redemption of stock warrant	0	(4,449)
Tax benefits associated with shared based compensation	80	76
Dividends paid	(8,371)	(5,829)
Net cash provided by financing activities	(40,060)	63,145
Net increase in cash and cash equivalents	6,953	7,696
Cash and cash equivalents at beginning of period	72,314	63,117	63,117
Cash and cash equivalents at end of period	79,267	70,813	72,314
Supplemental Disclosures:
Interest payments	17,319	20,288
Income tax payments	8,326	6,140
Transfers from loans to other real estate owned	$ 4,410	$ 5,761