Debt (Schedule Of Debt) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2014		Dec. 31, 2013
Schedule of Long-term Debt, By Type [Line Items]
Debt payable to 2038 at 2.6% to 8.6%	$ 1,697,015		$ 2,205,104
Unsecured notes payable under credit facilities	216,000		0
Debt service guaranty liability	73,740		73,740
Obligations under capital leases	21,000		21,000
Total	$ 2,007,755	[1]	$ 2,299,844	[1]
Debt Payable To 2038 [Member]
Schedule of Long-term Debt, By Type [Line Items]
Debt maturity date	Dec. 23, 2038		Dec. 23, 2038
Debt Payable To 2038 [Member] | Minimum [Member]
Schedule of Long-term Debt, By Type [Line Items]
Debt stated interest rate	2.60%		2.60%
Debt Payable To 2038 [Member] | Maximum [Member]
Schedule of Long-term Debt, By Type [Line Items]
Debt stated interest rate	8.60%		8.60%

[1] Consolidated variable interest entities' assets held as collateral and debt included in the above balances (see Note 16):