Debt - Amended Credit Agreement (Details)	May 19, 2016 USD ($)	Jun. 30, 2016 USD ($)	May 19, 2016 AUD	May 19, 2016 USD ($)	May 18, 2016 USD ($)	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Term loan		$ 291,000,000				$ 292,500,000
Revolver		$ 450,000,000				$ 485,000,000
Weighted average interest rate		2.90%
Revolver
Debt Instrument [Line Items]
Revolver		$ 450,000,000
Additional Revolver
Debt Instrument [Line Items]
Borrowing capacity increase		395,800,000
Revolving Credit Facility | Line of Credit | Amended Credit Agreement
Debt Instrument [Line Items]
Increase in borrowing capacity	$ 200,000,000
Maximum borrowing capacity				$ 900,000,000
Leverage ratio			2.50	2.50
Total leverage ratio, maximum			6.25	6.25
Senior secured leverage ratio			3.50	3.50
Interest coverage ratio			3.00	3.00
Revolving Credit Facility | Line of Credit | Amended Credit Agreement | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate			2.25%	2.25%
Interest rate			0.00%	0.00%
Letter of Credit
Debt Instrument [Line Items]
Long-term debt		54,200,000
Letter of Credit | Line of Credit | Amended Credit Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity			AUD 225,000,000	$ 300,000,000	$ 175,000,000
Accordion | Line of Credit | Amended Credit Agreement
Debt Instrument [Line Items]
Accordion feature, increase limit	$ 450,000,000
Term Loan
Debt Instrument [Line Items]
Term loan		$ 291,000,000
Term Loan | Line of Credit | Amended Credit Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 291,000,000
Term Loan | Line of Credit | Amended Credit Agreement | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate			2.50%	2.50%
Interest rate			0.75%	0.75%
Multicurrency Subfacility Commitment | Line of Credit | Amended Credit Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 100,000,000