Other Balance Sheet Items (Components Of Accounts Payable And Accrued Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Balance Sheet Related Disclosures [Abstract]
Accounts payable	$ 12,340	$ 15,907
Customer deposits, net	53,631	52,804
Accrued employee compensation	54,596	49,869
Taxes Payable, Current	27,194	30,308
Interest Payable	24,408	24,318
Customer incentives payable	12,556	13,547
accrued fees	13,090	11,529
Other accrued liabilities	10,827	11,706
Total accounts payable and accrued liabilities	$ 208,642	$ 209,988