Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Net cash provided by operating activities	$ 86,051	$ 100,402
Investing Activities
Proceeds from maturities, repayments, and calls of securities available-for-sale	191,624	135,320
Proceeds from sales of securities available-for-sale	12,059	97,330
Purchases of securities available-for-sale	(371,251)	(167,174)
Proceeds from maturities, repayments, and calls of securities held-to-maturity	10,470	35,497
Purchases of securities held-to-maturity	(10,945)	(30,319)
Proceeds from the redemption of Federal Home Loan Bank stock	11,437	3,151
Net increase in loans	(236,927)	(17,785)
Proceeds from claims on BOLI, net of purchases	315	6
Proceeds from sales of OREO	37,983	21,435
Proceeds from sales of premises, furniture, and equipment	3	5,526
Purchases of premises, furniture, and equipment	(3,986)	(2,483)
Net cash (used in) provided by investing activities	(359,218)	80,504
Financing Activities
Net increase (decrease) in deposit accounts	148,568	(15,927)
Net decrease in borrowed funds	(15,847)	(31,950)
Payments for the retirement of subordinated debt	(20,004)
Cash dividends paid	(1,491)	(6,310)
Restricted stock activity	(1,392)	(1,100)
Excess tax (expense) benefit related to share-based compensation	(35)	74
Net cash provided by (used in) financing activities	109,799	(55,213)
Net (decrease) increase in cash and cash equivalents	(163,368)	125,693
Cash and cash equivalents at beginning of period	641,530	585,776
Cash and cash equivalents at end of period	478,162	711,469
Supplemental Disclosures:
Non-cash transfers of loans to OREO	20,828	13,477
Non-cash transfer of loans held-for-investment to loans held-for-sale	1,500	5,395
Non-cash transfer of loans held-for-sale to loans held-for-investment	1,500	841
Dividends declared but unpaid	$ 749	$ 746