CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Additional Paid In Capital Preferred Stock	Common Stock	Additional Paid In Capital Common Stock	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss), Net of Tax	Preferred stock, Series B, cumulative Additional Paid In Capital Preferred Stock	Preferred stock, Series B, cumulative Retained Earnings	Preferred stock, Series C, cumulative convertible Additional Paid In Capital Preferred Stock	Preferred stock, Series C, cumulative convertible Common Stock	Preferred stock, Series C, cumulative convertible Additional Paid In Capital Common Stock	Preferred stock, Series A, non-cumulative convertible Additional Paid In Capital Preferred Stock	Preferred stock, Series A, non-cumulative convertible Additional Paid In Capital Common Stock
BALANCE at Dec. 31, 2009	$ 2,284,659	$ 693,803	$ 117	$ 1,091,047	$ 604,223	$ (105,130)	$ 599
Increase (Decrease) in Stockholders' Equity
Net income	164,564				164,564
Other comprehensive income (loss)	(13,013)						(13,013)
Stock compensation costs	8,480			8,480
Tax benefit (provision) from stock compensation plans, net	(170)			(170)
Issuance of 336,031, 1,024,925 and 1,867,194 shares of common stock pursuant to various stock compensation plans and agreements for the year ended, December 31, 2012, 2011 and 2010, respectively	4,454		2	4,452
Conversion of preferred stock into common stock										(325,299)	37	325,262
Issuance of 26,151, 27,831 and 17,910 shares pursuant to Director retainer fee for the year ended, December 31, 2012, 2011 and 2010, respectively	281			281
Cancellation of 190,634, 240,193 and 343,029 shares of common stock due to forfeitures of issued restricted stock for the year ended, December 31, 2012, 2011 and 2010, respectively				4,925		(4,925)
137,258, 29,610 and 65,834 shares of restricted stock surrendered due to employee tax liability for the year ended, December 31, 2012, 2011 and 2010, respectively	(1,207)					(1,207)
Amortization of Series B preferred stock discount	(21,042)							21,042	(21,042)
Preferred stock dividends	(22,084)				(22,084)
Common stock dividends	(5,545)				(5,545)
Repurchase of 1,517,555 common stock warrants for the year ended, December 31, 2011 and 306,546 shares of Series B preferred stock for the year ended, December 31, 2010, respectively	(306,488)							(306,488)
BALANCE at Dec. 31, 2010	2,113,931	83,058	156	1,434,277	720,116	(111,262)	(12,414)
Increase (Decrease) in Stockholders' Equity
Net income	245,234				245,234
Other comprehensive income (loss)	(21,526)						(21,526)
Stock compensation costs	13,543			13,543
Tax benefit (provision) from stock compensation plans, net	717			717
Issuance of 336,031, 1,024,925 and 1,867,194 shares of common stock pursuant to various stock compensation plans and agreements for the year ended, December 31, 2012, 2011 and 2010, respectively	5,206		1	5,205
Conversion of preferred stock into common stock													(31)	31
Issuance of 26,151, 27,831 and 17,910 shares pursuant to Director retainer fee for the year ended, December 31, 2012, 2011 and 2010, respectively	520			520
Cancellation of 190,634, 240,193 and 343,029 shares of common stock due to forfeitures of issued restricted stock for the year ended, December 31, 2012, 2011 and 2010, respectively				4,090		(4,090)
137,258, 29,610 and 65,834 shares of restricted stock surrendered due to employee tax liability for the year ended, December 31, 2012, 2011 and 2010, respectively	(649)					(649)
Preferred stock dividends	(6,857)				(6,857)
Common stock dividends	(23,876)				(23,876)
Repurchase of 1,517,555 common stock warrants for the year ended, December 31, 2011 and 306,546 shares of Series B preferred stock for the year ended, December 31, 2010, respectively	(14,500)			(14,500)
BALANCE at Dec. 31, 2011	2,311,743	83,027	157	1,443,883	934,617	(116,001)	(33,940)
Increase (Decrease) in Stockholders' Equity
Net income	281,650				281,650
Other comprehensive income (loss)	38,609						38,609
Stock compensation costs	12,668			12,668
Tax benefit (provision) from stock compensation plans, net	462			462
Issuance of 336,031, 1,024,925 and 1,867,194 shares of common stock pursuant to various stock compensation plans and agreements for the year ended, December 31, 2012, 2011 and 2010, respectively	3,821			3,821
Issuance of 26,151, 27,831 and 17,910 shares pursuant to Director retainer fee for the year ended, December 31, 2012, 2011 and 2010, respectively	570			570
Cancellation of 190,634, 240,193 and 343,029 shares of common stock due to forfeitures of issued restricted stock for the year ended, December 31, 2012, 2011 and 2010, respectively				3,335		(3,335)
137,258, 29,610 and 65,834 shares of restricted stock surrendered due to employee tax liability for the year ended, December 31, 2012, 2011 and 2010, respectively	(3,012)					(3,012)
Preferred stock dividends	(6,857)				(6,857)
Common stock dividends	(57,582)				(57,582)
Purchase 9,068,105 shares of treasury stock pursuant to the Stock Repurchase Plan	(199,950)					(199,950)
BALANCE at Dec. 31, 2012	$ 2,382,122	$ 83,027	$ 157	$ 1,464,739	$ 1,151,828	$ (322,298)	$ 4,669