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	$ 145,573	$ 128,332	$ 73,924
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	135,000	160,000	190,020
Depreciation and amortization of premises and equipment	21,081	20,477	20,601
Net amortization of investment securities premiums	6,022	5,178	1,706
Deferred income tax expense (benefit)	4,378	5,544	(20,432)
Investment securities gains	(4,561)	(701)	(1,079)
Gains on sales of mortgage loans	(22,207)	(27,519)	(22,644)
Proceeds from sales of mortgage loans held for sale	1,228,668	1,588,489	2,154,779
Originations of mortgage loans held for sale	(1,160,516)	(1,559,526)	(2,121,679)
Amortization of Intangible Assets	4,257	5,240	5,747
Stock-based compensation	4,249	1,996	1,781
Decrease in accrued interest receivable	2,743	4,674	51
Decrease (increase) in other assets	32,084	(9,173)	(83,777)
Decrease in accrued interest payable	(7,647)	(13,263)	(7,082)
Decrease in other liabilities	(17,126)	(24,939)	(9,334)
Total adjustments	226,425	156,477	108,658
Net cash provided by operating activities	371,998	284,809	182,582
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of securities available for sale	441,961	469,821	689,432
Proceeds from maturities of securities held to maturity	454	574	4,231
Proceeds from maturities of securities available for sale	667,171	774,403	789,301
Purchase of securities held to maturity	(29)	(215)	(3,528)
Purchase of securities available for sale	(984,286)	(954,700)	(2,002,888)
(Increase) decrease in short-term investments	(142,039)	(16,706)	5,119
Net increase in loans	(189,669)	(102,938)	(42,408)
Net purchases of premises and equipment	(25,339)	(24,290)	(22,147)
Net cash (used in) provided by investing activities	(231,776)	145,949	(582,888)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in demand and savings deposits	753,176	974,566	1,330,250
Net (decrease) increase in time deposits	(616,018)	(683,899)	215,748
Decrease in short-term borrowings	(77,044)	(194,863)	(893,830)
Additions to long-term debt	25,000	47,900	0
Repayments of long-term debt	(104,610)	(469,223)	(247,024)
Redemption of preferred stock and common stock warrant	0	(387,300)	0
Net proceeds from issuance of common stock	6,835	231,510	7,419
Dividends paid	(33,917)	(35,003)	(58,913)
Net cash (used in) provided by financing activities	(46,578)	(516,312)	353,650
Net Increase (Decrease) in Cash and Due From Banks	93,644	(85,554)	(46,656)
Cash and Due From Banks at Beginning of Year	198,954	284,508	331,164
Cash and Due From Banks at End of Year	292,598	198,954	284,508
Cash paid during the period for:
Interest	141,185	199,890	272,595
Income taxes	$ 20,920	$ 42,845	$ 22,599