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)