Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Operating Activities
Net income	$ 23,372	$ 12,665
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	8,084	22,929
Deferred tax expense	1,934	211
Depreciation and amortization	3,800	4,827
Net (gains) losses on securities and other assets	(522)	1,384
Net amortization of premiums and discounts on securities	717	460
Net accretion of premiums and discounts on long-term debt	(56)	(69)
Income from increase in cash surrender value of bank owned life insurance	(2,904)	(2,747)
Decrease in interest receivable	1,031	1,085
Decrease in interest payable	(951)	(558)
Increase (decrease) in income taxes payable	7,042	(894)
Other-net	(3,945)	(122)
Net cash provided by operating activities	37,602	39,171
Transactions with securities available for sale:
Proceeds from sales	0	69,926
Proceeds from maturities and redemptions	276,167	229,515
Purchases	(292,056)	(331,702)
Proceeds from the redemption of FHLB stock	3,880	4,764
Proceeds from bank owned life insurance	1,408	88
Proceeds from sale of loans	15,981	4,402
Proceeds from sales of other assets	10,971	5,513
Net (increase) decrease in loans	(125,567)	181,216
Purchases of premises and equipment	(4,022)	(4,230)
Net cash (used in) provided by investing activities	(113,238)	159,492
Financing Activities
Net decrease in federal funds purchased	(26,300)	(12,800)
Net increase (decrease) in other short-term borrowings	187,787	(13,126)
Net decrease in deposits	(42,692)	(81,657)
Repayments of other long-term debt	(25,238)	(24,328)
Proceeds from issuance of common stock	0	144
Discount on dividend reinvestment plan purchases	(42)	(32)
Dividends paid	(8,402)	(6,278)
Proceeds from reissuance of treasury stock	354	72
Purchase of treasury stock	(1,812)	(9)
Stock option tax benefit	1	0
Net cash provided by (used in) financing activities	83,656	(138,014)
Net increase in cash and cash equivalents	8,020	60,649
Cash and cash equivalents at January 1	78,478	69,858
Cash and cash equivalents at June 30	$ 86,498	$ 130,507