Long-Term Debt (Details)			0 Months Ended	1 Months Ended											3 Months Ended		0 Months Ended		1 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended				3 Months Ended				3 Months Ended
	Sep. 30, 2014 USD ($)	Dec. 31, 2013 USD ($)	May 27, 2014 Loans Payable [Member]	Jun. 30, 2014 Revolving Credit Facility [Member]	Sep. 30, 2014 Revolving Credit Facility [Member] USD ($)	May 27, 2014 Revolving Credit Facility [Member] USD ($)	May 27, 2014 Revolving Credit Facility [Member] Maximum Sub-limit of Australian Dollar, Canadian Dollar and Euro Revolving Loans [Member] USD ($)	May 27, 2014 Revolving Credit Facility [Member] Swingline U.S. [Member] USD ($)	Sep. 30, 2014 Revolving Credit Facility [Member] Line of Credit [Member] USD ($)	Sep. 30, 2014 Revolving Credit Facility [Member] United States Revolving Loan [Member] USD ($)	Sep. 30, 2014 Revolving Credit Facility [Member] Canadian Revolving Loan [Member] USD ($)	Sep. 30, 2014 Revolving Credit Facility [Member] Canadian Revolving Loan [Member] CAD	Sep. 30, 2014 Revolving Credit Facility [Member] European Revolving Loan [Member] USD ($)	Sep. 30, 2014 Revolving Credit Facility [Member] European Revolving Loan [Member] EUR (€)	Sep. 30, 2014 Revolving Credit Facility [Member] Minimum [Member]	Sep. 30, 2014 Revolving Credit Facility [Member] Maximum [Member]	May 27, 2014 Amended and Restated Credit Agreement [Member] USD ($)	May 27, 2014 Amended and Restated Credit Agreement [Member] USD ($)	Jun. 30, 2014 Amended and Restated Credit Agreement [Member] Base Rate [Member]	Sep. 30, 2014 Amended and Restated Credit Agreement [Member] Base Rate [Member] Minimum [Member]	Sep. 30, 2014 Amended and Restated Credit Agreement [Member] Base Rate [Member] Maximum [Member]	Jun. 30, 2014 Amended and Restated Credit Agreement [Member] LIBOR/BBSW Rate [Member]	Sep. 30, 2014 Amended and Restated Credit Agreement [Member] LIBOR/BBSW Rate [Member] Minimum [Member]	Sep. 30, 2014 Amended and Restated Credit Agreement [Member] LIBOR/BBSW Rate [Member] Maximum [Member]	Sep. 30, 2014 United States term loan [Member] USD ($)	Dec. 31, 2013 United States term loan [Member] USD ($)	Sep. 30, 2014 United States term loan [Member] Loans Payable [Member] USD ($)	May 27, 2014 United States term loan [Member] Loans Payable [Member] USD ($)	Sep. 30, 2014 Australian term loan [Member] USD ($)	Dec. 31, 2013 Australian term loan [Member] USD ($)	Sep. 30, 2014 Australian term loan [Member] Loans Payable [Member] USD ($)	Sep. 30, 2014 Australian term loan [Member] Loans Payable [Member] AUD	May 27, 2014 Australian term loan [Member] Loans Payable [Member] USD ($)	May 27, 2014 Australian term loan [Member] Loans Payable [Member] AUD
Debt Instrument, Face Amount																												$ 1,520,000,000					$ 200,300,000	216,800,000
Line of Credit Facility, Maximum Borrowing Capacity						625,000,000	400,000,000	50,000,000
Debt Instrument, Maturity Date																	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 Debt Issuance Cost																	4,600,000
Deferred Finance Costs, Gross																		3,600,000
Prepayments Of Debt																											105,000,000				27,600,000	30,000,000
Long-term Debt	1,640,776,000	1,624,712,000			28,000,000					11,000,000	11,600,000	13,000,000	5,400,000	4,300,000											1,415,000,000	1,433,414,000	1,415,000,000		163,226,000	134,436,000	163,200,000	186,800,000
Debt Instrument, Interest Rate, Stated Percentage										1.90%	3.00%	3.00%	1.76%	1.76%													1.90%				4.46%	4.46%
Debt Instrument, Frequency of Periodic Payment			quarterly
Letters of Credit Outstanding, Amount									2,800,000
Debt Instrument, Unused Borrowing Capacity, Amount					$ 594,200,000