Other Balance Sheet Items (Components Of Accounts Payable And Accrued Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Balance Sheet Related Disclosures [Abstract]
Accounts payable	$ 19,455	$ 23,298
Accrued employee compensation	61,426	51,851
Customer deposits, net	52,173	48,307
Interest Payable	27,701	27,701
Taxes payable and other tax liabilities	23,144	16,943
Other accrued liabilities	20,021	20,071
Total accounts payable and accrued liabilities	$ 203,920	$ 188,171