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Derivatives and Hedging Activities - Additional Information (Details) |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 25, 2017 USD ($) | Sep. 30, 2016 USD ($) | Jul. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) derivative | Sep. 30, 2016 USD ($) | Sep. 30, 2017 USD ($) derivative | Sep. 30, 2016 USD ($) | Dec. 31, 2016 derivative | Jun. 30, 2015 EUR (€) | Mar. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Derivative, cash paid on settlement of hedge |  |  |  |  |  | $ 2,500,000 |  |  |  |  |
4.50% Senior Notes due September 2023 |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt interest rate |  |  |  | 4.50% |  | 4.50% |  |  |  |  |
Delayed Draw Term Loan A Facility |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Notional amount of outstanding derivative |  |  |  |  |  |  |  |  |  |  | $ 100,000,000
Term Loan A due July 2019 |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Prepayment of term loan due July 2019 | $ 755,200,000 |  | $ 96,300,000 | $ 96,300,000 |  |  |  |  |  |  |
Interest rate swaps |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of derivative instruments outstanding | derivative |  |  |  | 0 |  | 0 |  | 0 |  |  |
Interest rate and currency swaps |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Notional amount of outstanding derivative |  |  |  |  |  |  |  |  |  |  | $ 100,000,000
Derivative notional amount settled |  | $ 20,000,000 |  |  | $ 20,000,000 |  | $ 20,000,000 |  |  |  |
Amount received on derivative settlement |  | $ 4,900,000 |  |  |  |  |  |  |  |  |
Foreign currency forward contracts | Net Investment Hedge |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Notional amount of outstanding derivative | € |  |  |  |  |  |  |  |  | € 270,000,000 |  |
Cumulative translation adjustment loss before tax |  |  |  | $ 3,500,000 |  | $ 3,500,000 |  |  |  |  |
Cumulative translation adjustment loss, after tax |  |  |  | 2,200,000 |  | 2,200,000 |  |  |  |  |
Foreign currency forward contracts | Designated as Hedging Instruments |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net unrealized after-tax gains/(losses) related to contracts included in other comprehensive income |  |  |  | (900,000) | $ 1,300,000 | (5,700,000) | $ (800,000) |  |  |  |
Net unrealized derivative losses included in AOCI to be reclassified into earnings in next twelve months |  |  |  |  |  | 400,000 |  |  |  |  |
EUR - Denominated debt | Net Investment Hedge | 4.50% Senior Notes due September 2023 |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument face amount | € |  |  |  |  |  |  |  |  | € 400,000,000 |  |
Debt interest rate |  |  |  |  |  |  |  |  | 4.50% |  |
EUR - Denominated debt | Designated as Hedging Instruments | Net Investment Hedge |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fair value of liability derivatives |  |  |  | 21,500,000 |  | 21,500,000 |  |  |  |  |
Fair value of liability derivatives, after tax |  |  |  | 13,300,000 |  | 13,300,000 |  |  |  |  |
Cross-currency swaps | Net Investment Hedge |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Notional amount of outstanding derivative |  |  |  |  |  |  |  |  |  | $ 425,000,000 |
Cross-currency swaps | Designated as Hedging Instruments | Net Investment Hedge |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fair value of liability derivatives |  |  |  | $ 61,900,000 |  | 61,900,000 |  |  |  |  |
Semi-annual interest settlement resulted in AOCI |  |  |  |  |  | 17,700,000 |  |  |  |  |
Semi-annual interest settlement resulted in AOCI after tax |  |  |  |  |  | $ (44,200,000) |  |  |  |  |

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