Basis of Presentation and Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Property Plant And Equipment [Line Items]
Property Plant And Equipment Useful Life	40 years
Interest Costs Capitalized	$ 62,786	$ 42,303
Maximum [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment Useful Life	40 years
Minimum [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment Useful Life	7 years