Other Balance Sheet Items (Property And Equipment, Net) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Balance Sheet Related Disclosures [Abstract]
Land	$ 31,141us-gaap_Land	$ 31,141us-gaap_Land
Buildings and building improvements	243,300us-gaap_BuildingsAndImprovementsGross	240,572us-gaap_BuildingsAndImprovementsGross
Computer equipment and software	403,945	359,331
Capital work in progress	7,520us-gaap_ConstructionInProgressGross	16,213us-gaap_ConstructionInProgressGross
Office equipment and furniture	6,341us-gaap_FurnitureAndFixturesGross	6,305us-gaap_FurnitureAndFixturesGross
Leasehold improvements	1,858us-gaap_LeaseholdImprovementsGross	2,189us-gaap_LeaseholdImprovementsGross
Total cost	694,105us-gaap_PropertyPlantAndEquipmentGross	655,751us-gaap_PropertyPlantAndEquipmentGross
Less: accumulated depreciation and amortization	(375,077)	(316,098)
Total property and equipment, net	$ 319,028us-gaap_PropertyPlantAndEquipmentNet	$ 339,653us-gaap_PropertyPlantAndEquipmentNet

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software.

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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- Definition

Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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Amount before accumulated depreciation of additions or improvements to assets held under a lease arrangement.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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