Other Balance Sheet Items (Property And Equipment, Net) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Computer equipment and software	$ 400,628	$ 415,086
Buildings and building improvements	254,549	250,431
Land	31,141	31,141
Office equipment and furniture	10,104	9,179
Capital work in progress	3,088	4,330
Leasehold improvements	1,476	1,458
Total cost	700,986	711,625
Less: accumulated depreciation and amortization	(449,763)	(466,054)
Total property and equipment, net	$ 251,223	$ 245,571