Long-term Debt (Details 2) (USD $)	3 Months Ended	89 Months Ended
	Mar. 31, 2013	Mar. 31, 2013
Long-term Debt
Interest expense associated with accrued interest	$ 7,352,000	$ 8,760,000
Interest expense associated with accretion of debt discount	10,864,000	12,660,000
Interest expense associated with amortization of debt issue costs	441,000	517,000
Total	18,657,000	21,937,000
Capitalized interest costs	$ 1,700,000