Long-term Debt Term Loan & Installments (Details) (Loans Payable [Member])	0 Months Ended	7 Months Ended	12 Months Ended	0 Months Ended			7 Months Ended		12 Months Ended		0 Months Ended
	Dec. 31, 2014	Dec. 31, 2014 United States Term Loan [Member] USD ($)	Dec. 31, 2013 United States Term Loan [Member] USD ($)	Dec. 31, 2014 United States Term Loan [Member] Period 1 [Member] USD ($)	Dec. 31, 2014 United States Term Loan [Member] Period 2 [Member] USD ($)	Dec. 31, 2014 United States Term Loan [Member] Period 3 [Member] USD ($)	Dec. 31, 2014 Australian Term Loan [Member] USD ($)	Dec. 31, 2014 Australian Term Loan [Member] AUD	Dec. 31, 2013 Australian Term Loan [Member] USD ($)	Dec. 31, 2013 Australian Term Loan [Member] AUD	Dec. 31, 2014 Australian Term Loan [Member] Period 1 [Member] AUD	Dec. 31, 2014 Australian Term Loan [Member] Period 2 [Member] AUD	Dec. 31, 2014 Australian Term Loan [Member] Period 3 [Member] AUD
Prepayments Of Debt		$ 113,000,000	$ 79,000,000				$ 47,000,000	53,000,000	$ 23,600,000	24,000,000
Long-term debt		1,400,000,000					133,900,000	163,800,000
Debt instrument, interest rate, stated percentage		1.67%					4.19%	4.19%
Debt Instrument, Frequency of Periodic Payment	quarterly
Principal amount of each quarterly installment				19,000,000	38,000,000						2,710,000	5,420,000
Principal amount of quarterly installment at maturity date						$ 989,000,000							104,180,000