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Stock-based Compensation - Narrative (Details) - USD ($) |  | 3 Months Ended
--- | --- | ---
Feb. 17, 2016 | Mar. 31, 2017 | Mar. 31, 2016
Stock-based Compensation arrangements |  |  |
Stock based compensation expense |  | $ 8,300,000 | $ 10,600,000
Increase in deferred tax expense |  | $ 800,000 |
Tax deficiency on share-based compensation |  |  | $ 2,000,000
Restricted Stock Units |  |  |
Stock-based Compensation arrangements |  |  |
Granted (in shares) |  | 46,618 |
Granted (in dollars per share) |  | $ 22.57 |
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) |  | 6.00% |
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) |  | 406,460 |
Granted (in dollars per share) |  | $ 22.60 |
Number of years over which performance criteria is to be met |  | 3 years |
Hybrid Performance Share Awards |  |  |
Stock-based Compensation arrangements |  |  |
Granted (in shares) |  | 272,920 |
Granted (in dollars per share) |  | $ 22.60 |
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) |  | 409,380 |
Granted (in dollars per share) | $ 19.85 |  |
Performance period |  | 3 years |
TSR Performance Share Awards | Minimum |  |  |
Stock-based Compensation arrangements |  |  |
Granted (in dollars per share) |  | $ 7.35 |
TSR Performance Share Awards | Maximum |  |  |
Stock-based Compensation arrangements |  |  |
Granted (in dollars per share) |  | $ 14.16 |

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- Definition Represents the minimum operating cash flow which the entity must achieve in the one-year period preceding the vesting date of share-based compensation awards with payout based on performance. + References No definition available. + Details
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