Prepaid Expenses And Other Current Assets (Schedule Of Prepaid Expense And Other Current Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Prepaid Expenses And Other Current Assets [Abstract]
Prepaid land rent	$ 30,932	$ 33,975
Other	23,330	18,230
Total prepaid expenses and other current assets	$ 54,262	$ 52,205