Other Balance Sheet Items (Property And Equipment, Net) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Land	$ 31,141	$ 31,141
Buildings and building improvements	244,760	243,300
Computer equipment and software	432,463	403,945
Capital work in progress	5,406	7,520
Office equipment and furniture	6,203	6,341
Leasehold improvements	1,350	1,858
Total cost	721,323	694,105
Less: accumulated depreciation and amortization	(425,753)	(375,077)
Total property and equipment, net	$ 295,570	$ 319,028