Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net income (loss)	$ 91,115	$ (53,823)	$ (31,550)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Other derivative income	(7,026)	(1,963)	(1,399)
Gain on sales of investment securities	(4,944)	(41,376)	(17,595)
Amortization of premiums and discounts, net	5,022	3,417	403
Other-than-temporary impairment of investment security	571
Deferred loan fee amortization	(4,289)	(5,983)	(5,253)
Provision for loan losses	49,258	143,127	89,611
Loans purchased			(76,829)
Loans originated for sale	(1,708,354)	(821,350)
Proceeds from loan sales	1,787,778	630,771	11,607
Net (gain) loss on sale of loans	(12,108)	(6,187)	7,792
Depreciation and amortization	2,408	2,309	2,344
Deferred income tax expense (benefit)	(73,476)		4,997
Losses on other real estate	3,511	12,643	2,814
Tax benefit (expense) on stock options exercised or stock awards			(541)
Excess tax benefit on stock options exercised and stock awards	510	5	410
Net cash received on initiation/termination of derivative instruments	937		6,630
Other, net	3,514	(5,969)	(1,057)
Changes in other assets and liabilities:
Accrued interest receivable	235	946	1,006
Other assets	785	6,466	(14,769)
Accrued interest payable, taxes and other liabilities	5,227	(3,769)	(8,425)
Net cash provided by (used in) operating activities	140,674	(140,736)	(29,804)
Cash flows from investing activities:
Purchases of available for sale securities	(207,443)	(1,147,907)	(975,304)
Purchases of held to maturity securities	(22,404)	(50,224)
Proceeds from principal payments and maturities of available for sale securities	118,317	247,975	312,451
Proceeds from principal payments and maturities of held to maturity securities	19,191	4,929	25
Proceeds from sales of available for sale securities	130,635	965,605	497,415
Net (increase) decrease in loans	(178,176)	(15,750)	119,566
Net additions to premises, leasehold improvements and equipment	(1,400)	(2,684)	(735)
Purchases of FHLB and FRB stock	(16,749)	(8,822)	(6,580)
Proceeds from sales of FHLB and FRB stock			5,000
Additions to other real estate owned and repossessed assets			(342)
Net proceeds from sales of other real estate and repossessed assets	17,478	16,822	13,552
Purchase of mortgage servicing rights	(2,663)
Net cash provided by (used in) investing activities	(143,214)	9,944	(34,952)
Cash flows from financing activities:
Net increase (decrease) in deposits	91,003	48,552	(156,293)
Net increase (decrease) in other borrowings	(342,875)	121,339	207,109
Proceeds from notes payable and other advances	242,500	45,000	20,000
Repayments of notes payable and other advances		(115,000)
Net proceeds from issuance of subordinated debt	81	36,150
Net proceeds from issuance of preferred stock	24,350	36,245	(27)
Net proceeds from issuance of common stock	33,800	(21)
Proceeds from exercise of employee stock options	9	5
Excess tax benefit on stock options exercised and stock awards	(510)	(5)	(410)
Dividends paid	(5,983)	(8,613)	(10,166)
Net cash provided by financing activities	42,375	163,652	60,213
Net increase (decrease) in cash and cash equivalents	39,835	32,860	(4,543)
Cash and cash equivalents, beginning of year	81,329	48,469	53,012
Cash and cash equivalents, end of year	121,164	81,329	48,469
Supplemental disclosure of cash flow information:
Interest	55,444	74,716	104,687
Income taxes	(408)	(4,855)	(16,269)
Supplemental disclosures of noncash investing and financing activities:
Transfer of available for sale investment securities to held to maturity investment securities		55,633
Change in fair value of available for sale investment securities, net of income taxes	53,169	(26,946)	(5,115)
Transfer of portfolio loans to held for sale loans		39,053	28,739
Transfer of held for sale loans to portfolio loans	5,720	52,967	1,158
Loans transferred to other real estate and repossessed assets	25,143	34,725	29,076
Exchange of common stock for Series D Preferred		4,949
Series C and E Preferred dividends paid in common stock and Series G Preferred	$ 2,249