Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 159,845	$ 145,573	$ 128,332
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	94,000	135,000	160,000
Depreciation and amortization of premises and equipment	22,575	21,081	20,477
Net amortization of investment securities premiums	12,151	6,022	5,178
Deferred income tax expense (benefit)	17,007	4,378	5,544
Investment securities gains	(3,026)	(4,561)	(701)
Gains on sales of mortgage loans	(46,310)	(22,207)	(27,519)
Proceeds from sales of mortgage loans held for sale	1,820,180	1,228,668	1,588,489
Originations of mortgage loans held for sale	(1,800,142)	(1,160,516)	(1,559,526)
Amortization of Intangible Assets	3,031	4,257	5,240
Gain (Loss) on Sale of Business	(6,215)	0	0
Stock-based compensation	4,834	4,249	1,996
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Operating Activities	(39)	0	0
Decrease in accrued interest receivable	5,312	2,743	4,674
Decrease (increase) in other assets	19,763	32,084	(9,173)
Decrease in accrued interest payable	(6,356)	(7,647)	(13,263)
Decrease in other liabilities	(328)	(17,126)	(24,939)
Total adjustments	136,437	226,425	156,477
Net cash provided by operating activities	296,282	371,998	284,809
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of securities available for sale	257,316	441,961	469,821
Proceeds from maturities of securities held to maturity	390	454	574
Proceeds from maturities of securities available for sale	878,721	667,171	774,403
Purchase of securities held to maturity	(346)	(29)	(215)
Purchase of securities available for sale	(1,129,713)	(984,286)	(954,700)
Decrease (increase) in short-term investments	2,079	(142,039)	(16,706)
Proceeds from Divestiture of Businesses	11,834	0	0
Net increase in loans	(302,372)	(189,669)	(102,938)
Net purchases of premises and equipment	(38,024)	(25,339)	(24,290)
Net cash (used in) provided by investing activities	(320,115)	(231,776)	145,949
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in demand and savings deposits	577,964	753,176	974,566
Net (decrease) increase in time deposits	(630,612)	(616,018)	(683,899)
Decrease in short-term borrowings	271,366	(77,044)	(194,863)
Additions to long-term debt	5,700	25,000	47,900
Repayments of long-term debt	(151,596)	(104,610)	(469,223)
Redemption of preferred stock and common stock warrant	0	0	(387,300)
Net proceeds from issuance of common stock	7,005	6,835	231,510
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities	39	0	0
Dividends paid	(71,972)	(33,917)	(35,003)
Payments for Repurchase of Common Stock	(20,359)	0	0
Net cash (used in) provided by financing activities	(12,465)	(46,578)	(516,312)
Net Increase (Decrease) in Cash and Due From Banks	(36,298)	93,644	(85,554)
Cash and Due From Banks at Beginning of Year	292,598	198,954	284,508
Cash and Due From Banks at End of Year	256,300	292,598	198,954
Cash paid during the period for:
Interest	109,524	141,185	199,890
Income taxes	$ 30,985	$ 20,920	$ 42,845