Equity Investees (Schedule Of Balance Sheet Information For Equity Investees) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
Current assets	$ 17,191	$ 18,507
Fixed assets, net	240,385	248,059
Other assets	997	1,133
Total assets	258,573	267,699
Current liabilities	24,007	22,456
Other liabilities	209,588	203,514
Equity	24,978	41,729
Total liabilities and equity	$ 258,573	$ 267,699