Long-term Debt Schedule of Future Payments Including Capital Leases (Details)		12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2014 Non interest bearing note [Member] USD ($)	Dec. 31, 2014 Non interest bearing note [Member] AUD	Dec. 01, 2010 Non interest bearing note [Member] USD ($)	Dec. 01, 2010 Non interest bearing note [Member] AUD
Debt Instrument, Redemption [Line Items]
2015	$ 67,492,000
2016	87,037,000
2017	136,084,000
2018	170,034,000
2019	1,153,239,000
Thereafter	41,003,000
Total	1,654,889,000
Non-interest bearing loan		40,900,000		48,200,000	50,000,000
Non-interest bearing loan, maturity date		Jan. 14, 2054	Jan. 14, 2054
Non-interest bearing loan, carrying value		$ 2,000,000	2,500,000	$ 1,700,000	1,800,000