Other Balance Sheet Items (Components Of Accounts Payable And Accrued Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Balance Sheet Related Disclosures [Abstract]
Accounts payable	$ 18,938	$ 19,455
Accrued employee compensation	28,704	61,426
Deposits, net	53,571	52,173
Interest Payable, Current	32,779	27,701
Taxes Payable, Current	6,037	23,144
Other accrued liabilities	14,977	20,021
Total accounts payable and accrued liabilities	$ 155,006	$ 203,920