Debt (BNDE Loans) (Narrative) (Details) (USD $)			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 BNDE Loan [Member]	Dec. 31, 2013 Minimum [Member] BNDE Loan [Member]	Dec. 31, 2013 Maximum [Member] BNDE Loan [Member]
Debt Instrument [Line Items]
Debt instrument, Fair Value			$ 5,847,000
Debt instrument, additional borrowings			1,300,000
Repayments of long-term debt			200,000
Minimum interest rate			2.50%
Maximum interest rate			6.50%
Debt instrument, maturity date				Jan. 18, 2016	Jul. 19, 2018
Debt instrument, Principal Balance	5,910,041,000	5,440,073,000	5,847,000
Debt, Carrying Value	$ 5,876,607,000	$ 5,356,103,000	$ 5,847,000