Other Balance Sheet Items (Components Of Accounts Payable And Accrued Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Balance Sheet Related Disclosures [Abstract]
Accounts payable	$ 23,410	$ 23,519
Accrued employee compensation	28,875	38,778
Customer deposits, net	17,643	19,321
Taxes payable and other tax liabilities	32,275	21,918
Other accrued liabilities	17,783	26,855
Total accounts payable and accrued liabilities	$ 119,986	$ 130,391