Consolidated Statements Of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Net cash provided by operating activities	$ 70,414	$ 86,051
Investing Activities
Proceeds from maturities, repayments, and calls of securities available-for-sale	125,533	191,624
Proceeds from sales of securities available-for-sale	19,745	12,059
Purchases of securities available-for-sale	(289,666)	(371,251)
Proceeds from maturities, repayments, and calls of securities held-to-maturity	5,803	10,470
Purchases of securities held-to-maturity	(1,881)	(10,945)
Proceeds from the redemption of FHLB stock	12,071	11,437
Net increase in loans	(85,210)	(236,927)
(Purchases) of BOLI, net of proceeds from claims	(76)	315
Proceeds from sales of OREO	10,907	37,983
Proceeds from sales of premises, furniture, and equipment	1,425	3
Purchases of premises, furniture, and equipment	(3,286)	(3,986)
Net cash used in investing activities	(204,635)	(359,218)
Financing Activities
Net increase in deposit accounts	194,492	148,568
Net increase (decrease) in borrowed funds	10,619	(15,847)
Payments for the retirement of subordinated debt		(20,004)
Cash dividends paid	(1,499)	(1,491)
Restricted stock activity	(1,588)	(1,392)
Excess tax benefit (expense) related to share-based compensation	36	(35)
Net cash provided by financing activities	202,060	109,799
Net increase (decrease) in cash and cash equivalents	67,839	(163,368)
Cash and cash equivalents at beginning of period	716,266	641,530
Cash and cash equivalents at end of period	784,105	478,162
Supplemental Disclosures:
Non-cash transfers of loans to OREO	11,502	20,828
Non-cash transfer of loans held-for-investment to loans held-for-sale	1,275	1,500
Non-cash transfer of loans held-for-sale to loans held-for-investment		1,500
Non-cash transfer of an investment from other assets to securities available-for-sale	2,787
Dividends declared but unpaid	$ 3,005	$ 749