Stock-Based Compensation - Schedule of Restricted Stock Units by Type (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total restricted stock units vesting conditions granted	3,090	2,524	3,098
Service-based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units vesting conditions granted	2,507	1,949	2,338
Performance-based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted with performance based vesting	583	575	760