CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Preferred Stock	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 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, 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 from stock compensation plans, net	717				717
Issuance of 323,737, 336,031, and 1,024,925 shares of common stock pursuant to various stock compensation plans and agreements for the year ended, December 31, 2013, 2012 and 2011, respectively	5,206			1	5,205
Conversion of 85,710 and 31 shares of Series A preferred stock into 5,594,080 and 2,014 shares of common stock for the year ended, December 31, 2013 and 2011 respectively									(31)	31
Issuance of 19,998, 26,151 and 27,831 shares pursuant to Director retainer fee for the year ended, December 31, 2013, 2012, and 2011, respectively	520				520
Cancellation of 65,686, 190,634 and 240,193 shares of common stock due to forfeitures of issued restricted stock for the year ended, December 31, 2013, 2012, and 2011, respectively					4,090		(4,090)
508,518, 137,258 and 29,610 shares of restricted stock surrendered due to employee tax liability for the year ended, December 31, 2013, 2012 and 2011, 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	(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 from stock compensation plans, net	462				462
Issuance of 323,737, 336,031, and 1,024,925 shares of common stock pursuant to various stock compensation plans and agreements for the year ended, December 31, 2013, 2012 and 2011, respectively	3,821				3,821
Issuance of 19,998, 26,151 and 27,831 shares pursuant to Director retainer fee for the year ended, December 31, 2013, 2012, and 2011, respectively	570				570
Cancellation of 65,686, 190,634 and 240,193 shares of common stock due to forfeitures of issued restricted stock for the year ended, December 31, 2013, 2012, and 2011, respectively					3,335		(3,335)
508,518, 137,258 and 29,610 shares of restricted stock surrendered due to employee tax liability for the year ended, December 31, 2013, 2012 and 2011, respectively	(3,012)						(3,012)
Preferred stock dividends	(6,857)					(6,857)
Common stock dividends	(57,582)					(57,582)
Purchase of 8,026,807 and 9,068,105 shares of treasury stock pursuant to the Stock Repurchase Program year ended, December 31, 2013, and 2012, respectively	(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
Increase (Decrease) in Stockholders' Equity
Net income	295,045					295,045
Other comprehensive income (loss)	(35,128)							(35,128)
Stock compensation costs	13,548				13,548
Tax benefit from stock compensation plans, net	5,522				5,522
Issuance of 323,737, 336,031, and 1,024,925 shares of common stock pursuant to various stock compensation plans and agreements for the year ended, December 31, 2013, 2012 and 2011, respectively	3,054				3,054
Conversion of 85,710 and 31 shares of Series A preferred stock into 5,594,080 and 2,014 shares of common stock for the year ended, December 31, 2013 and 2011 respectively				6					(83,027)	83,021
Issuance of 19,998, 26,151 and 27,831 shares pursuant to Director retainer fee for the year ended, December 31, 2013, 2012, and 2011, respectively	630				630
Cancellation of 65,686, 190,634 and 240,193 shares of common stock due to forfeitures of issued restricted stock for the year ended, December 31, 2013, 2012, and 2011, respectively					1,156		(1,156)
508,518, 137,258 and 29,610 shares of restricted stock surrendered due to employee tax liability for the year ended, December 31, 2013, 2012 and 2011, respectively	(13,833)						(13,833)
Preferred stock dividends	(3,428)					(3,428)
Common stock dividends	(83,315)					(83,315)
Purchase of 8,026,807 and 9,068,105 shares of treasury stock pursuant to the Stock Repurchase Program year ended, December 31, 2013, and 2012, respectively	(199,992)						(199,992)
BALANCE at Dec. 31, 2013	$ 2,364,225	$ 0		$ 163	$ 1,571,670	$ 1,360,130	$ (537,279)	$ (30,459)