(Loss)/Earnings Per Common Share (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
(Loss)/Earnings Per Common Share
Weighted average shares for basic (loss)/earnings per share	119,564,000	124,061,000	119,176,000	123,825,000
Effect of dilutive common share equivalents		6,545,000		6,873,000
Weighted average shares and dilutive common share equivalents for dilutive (loss)/earnings per share	119,564,000	130,606,000	119,176,000	130,698,000
Stock options
(Loss)/Earnings Per Common Share
Anti-dilutive securities excluded from computation of dilutive earnings loss per share (in shares)	9,500,000	9,100,000	9,500,000	9,100,000
Restricted stock
(Loss)/Earnings Per Common Share
Anti-dilutive securities excluded from computation of dilutive earnings loss per share (in shares)	9,200,000	3,200,000	9,200,000	3,200,000
Restricted stock units (RSUs)
(Loss)/Earnings Per Common Share
Anti-dilutive securities excluded from computation of dilutive earnings loss per share (in shares)	4,000,000	500,000	4,000,000	500,000