Equity Investees (Schedule Of Balance Sheet Information For Equity Investees) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
Current assets	$ 14,662	$ 18,507
Fixed assets, net	236,509	248,059
Other assets	929	1,133
Total assets	252,100	267,699
Current liabilities	23,135	22,456
Other liabilities	211,066	203,514
Equity	17,899	41,729
Total liabilities and equity	$ 252,100	$ 267,699