CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Issuance of shares of common stock pursuant to various stock compensation plans and agreements, shares	245,261	274,430
Cancellation of common stock due to forfeitures of issued restricted stock, shares	44,793	108,662
Restricted stock surrendered due to employee tax liability, shares	356,426	63,636
Purchase of treasury stock pursuant to the Stock Repurchase Program, shares	8,026,807	6,784,227
Preferred stock, Series A, non-cumulative convertible
Conversion of Series preferred stock, shares	85,710
Converted shares of common stock, shares	5,594,080