Stock-based Compensation - Narrative (Details) - USD ($)		3 Months Ended
	Feb. 20, 2014	Mar. 31, 2016	Mar. 31, 2015
Stock-based Compensation arrangements
Stock based compensation expense		$ 10,600,000	$ 5,900,000
Tax deficiency on share-based compensation		$ 2,000,000
Tax benefits realized for stock-based compensation			$ 3,400,000
Restricted Stock Units
Stock-based Compensation arrangements
Granted (in shares)		61,805
Granted (in dollars per share)		$ 20.28
Performance Share Awards | Minimum
Stock-based Compensation arrangements
Annual forfeiture rate assumption (as a percent)		0.00%
Performance Share Awards | Maximum
Stock-based Compensation arrangements
Annual forfeiture rate assumption (as a percent)		5.00%
Performance Share Awards Based on Internal Performance Metrics
Stock-based Compensation arrangements
Right to receive additional shares, maximum (as a percent)		100.00%
Employee Performance Share Awards
Stock-based Compensation arrangements
Granted (in shares)		435,990
Granted (in dollars per share)		$ 20.49
Number of years over which performance criteria is to be met		3 years
Hybrid Performance Share Awards
Stock-based Compensation arrangements
Granted (in shares)		271,938
Granted (in dollars per share)		$ 20.49
Vesting rights		The 2016 awards vest 25% on each of the first and second anniversary dates and 50% on the third anniversary
Minimum operating cash flow for the year preceding the performance period		$ 100,000,000
Hybrid Performance Share Awards | Hybrid performance share awards, percentage vesting on the first anniversary
Stock-based Compensation arrangements
Award vesting rights, percentage		25.00%
Hybrid Performance Share Awards | Hybrid performance share awards, percentage vesting on the second anniversary
Stock-based Compensation arrangements
Award vesting rights, percentage		25.00%
Hybrid Performance Share Awards | Hybrid performance share awards, percentage vesting on the third anniversary
Stock-based Compensation arrangements
Award vesting rights, percentage		50.00%
Performance Shares Based on Market Conditions
Stock-based Compensation arrangements
Right to receive shares (as a percent)		100.00%
Right to receive an additional award in cash (as a percent)		100.00%
TSR Performance Share Awards
Stock-based Compensation arrangements
Granted (in shares)		407,907
Granted (in dollars per share)	$ 18.57
Performance period		3 years
TSR Performance Share Awards | Minimum
Stock-based Compensation arrangements
Granted (in dollars per share)		$ 5.40
TSR Performance Share Awards | Maximum
Stock-based Compensation arrangements
Granted (in dollars per share)		$ 11.24