Other Current and Long-Term Assets (Schedule of Other Current Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Other Assets, Noncurrent [Abstract]
Customer acquisition costs	$ 48,942	$ 43,751
Prepaid expenses	41,997	34,556
Contract assets, net	37,772	23,837
Taxes receivable	19,464	19,476
Deferred sales commissions	6,475	5,738
Other	19,173	10,150
Other current assets	$ 173,823	$ 137,508