CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Issuance of shares pursuant to various stock compensation plans and agreements, shares	336,031	1,024,925	1,867,194
Issuance of shares pursuant to Director retainer fee, shares	26,151	27,831	17,910
Cancellation of common stock due to forfeitures of issued restricted stock, shares	190,634	240,193	343,029
Restricted stock surrendered due to employee tax liability, shares	137,258	29,610	65,834
Repurchase of common stock warrants or preferred stock, shares		1,517,555
Repurchase of treasury stock pursuant to the Stock Repurchase Plan, shares	9,068,105
Preferred stock, Series A, non-cumulative convertible
Conversion of Series preferred stock, shares		31
Converted shares of common stock, shares		2,014
Preferred stock, Series B, cumulative
Repurchase of common stock warrants or preferred stock, shares			306,546
Preferred stock, Series C, cumulative convertible
Conversion of Series preferred stock, shares			335,047
Converted shares of common stock, shares			37,103,734