Long-term Debt Credit Agreement & Amendment No. 2 (Details)	12 Months Ended				12 Months Ended							4 Months Ended			3 Months Ended				12 Months Ended	4 Months Ended	3 Months Ended		4 Months Ended	3 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	May 27, 2014 USD ($)	Dec. 31, 2014 Other Debt Obligations [Member]	May 27, 2014 Loans Payable [Member] United States Term Loan [Member] USD ($)	Oct. 02, 2012 Loans Payable [Member] United States Term Loan [Member] USD ($)	May 27, 2014 Loans Payable [Member] Australian Term Loan [Member] USD ($)	May 27, 2014 Loans Payable [Member] Australian Term Loan [Member] AUD	Oct. 02, 2012 Loans Payable [Member] Australian Term Loan [Member] USD ($)	Oct. 02, 2012 Loans Payable [Member] Australian Term Loan [Member] AUD	Sep. 30, 2014 Revolving Credit Facility [Member]	May 27, 2014 Revolving Credit Facility [Member] USD ($)	Oct. 02, 2012 Revolving Credit Facility [Member] USD ($)	Dec. 31, 2014 Revolving Credit Facility [Member] Minimum [Member]	Dec. 31, 2014 Revolving Credit Facility [Member] Maximum [Member]	May 27, 2014 Revolving Credit Facility [Member] Maximum Sub-limit of Australian Dollar, Canadian Dollar and Euro Revolving Loans [Member] USD ($)	May 27, 2014 Revolving Credit Facility [Member] Swingline Credit Facility [Member] USD ($)	Dec. 31, 2014 Amended and Restated Credit Agreement [Member]	Sep. 30, 2014 Amended and Restated Credit Agreement [Member] Base Rate [Member]	Dec. 31, 2014 Amended and Restated Credit Agreement [Member] Base Rate [Member] Minimum [Member]	Dec. 31, 2014 Amended and Restated Credit Agreement [Member] Base Rate [Member] Maximum [Member]	Sep. 30, 2014 Amended and Restated Credit Agreement [Member] LIBOR Interest Rate [Member]	Dec. 31, 2014 Amended and Restated Credit Agreement [Member] LIBOR Interest Rate [Member] Minimum [Member]	Dec. 31, 2014 Amended and Restated Credit Agreement [Member] LIBOR Interest Rate [Member] Maximum [Member]
Debt Instrument [Line Items]
Term Loan						$ 1,520,000,000	$ 1,600,000,000	$ 200,300,000	216,800,000	$ 210,000,000	202,900,000
Line of Credit Facility, Maximum Borrowing Capacity													625,000,000	425,000,000			400,000,000	50,000,000
Debt Instrument, Maturity date					Oct. 01, 2054														May 31, 2019
Debt Instrument, Basis Spread on Variable Rate																				0.75%	0.00%	1.00%	1.75%	1.00%	2.00%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage												0.30%			0.20%	0.30%
Write off of deferred financing fees	4,600,000	500,000	3,200,000
Capitalized deferred financing costs	$ 27,158,000	$ 43,650,000		$ 3,700,000