Restricted Stock Awards and Restricted Stock Units Activity Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Restricted Stock Awards [Member]
Schedule of Restricted Stock Award and Restricted Stock Unit Activity [Line Items]
Grant date fair value of vested awards	$ 1,300,000	$ 1,800,000	$ 2,200,000
Unrecognized share-based compensation expense related to unvested awards	1,000,000
Weighted Average Period of Non-Vested Stock Awards	6 months 7 days
Restricted Stock Units [Member]
Schedule of Restricted Stock Award and Restricted Stock Unit Activity [Line Items]
Grant date fair value of vested awards	7,100,000	3,100,000	400,000
Unrecognized share-based compensation expense related to unvested awards	15,600,000
Weighted Average Period of Non-Vested Stock Awards	1 year 9 months
Time-Based Restricted Stock Awards [Member]
Schedule of Restricted Stock Award and Restricted Stock Unit Activity [Line Items]
Unrecognized share-based compensation expense related to unvested awards	500,000
Weighted Average Period of Non-Vested Stock Awards	7 months 21 days
Perfromance-Based Restricted Stock Awards [Member]
Schedule of Restricted Stock Award and Restricted Stock Unit Activity [Line Items]
Unrecognized share-based compensation expense related to unvested awards	500,000
Weighted Average Period of Non-Vested Stock Awards	5 months 12 days
Time-Based Restricted Stock Units [Member]
Schedule of Restricted Stock Award and Restricted Stock Unit Activity [Line Items]
Unrecognized share-based compensation expense related to unvested awards	9,800,000
Weighted Average Period of Non-Vested Stock Awards	1 year 8 months 23 days
Performance-Based Restricted Stock Units [Member]
Schedule of Restricted Stock Award and Restricted Stock Unit Activity [Line Items]
Unrecognized share-based compensation expense related to unvested awards	$ 5,800,000
Weighted Average Period of Non-Vested Stock Awards	1 year 9 months 7 days