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Segment Reporting (Details Textual 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Additional Segment Reporting (Textual) [Abstract]
Net book value of property and equipment	$ 78,576	$ 89,773
United States [Member]
Additional Segment Reporting (Textual) [Abstract]
Net book value of property and equipment	67,700	71,500
Percent of net book value of property and equipment	86.00%	80.00%
India [Member]
Additional Segment Reporting (Textual) [Abstract]
Net book value of property and equipment	$ 10,900	$ 18,300
Percent of net book value of property and equipment	14.00%	20.00%

Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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