Represents the remaining leased space.

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Represents the space of facility lease which is terminated.

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Represents the portion of remaining leased space subleased by the entity.

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Represents the residual percentage of equity interest, agreed to be acquired by the entity.

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Represents amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing between the next fiscal year and the third fiscal year following the latest fiscal year.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

Rental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses.

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No definition available.

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the next fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the forth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the second fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing after the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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The total amount of sublease rental income recognized during the period that reduces the entity's rent expense incurred under operating leases.

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Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the next fiscal year following the latest fiscal year.

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Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

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COMMITMENTS AND CONTINGENCIES (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended
	Jan. 31, 2009 sqft	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jun. 30, 2008 sqft
Operating Leases
2013		$ 14,850
2014		12,346
2015		11,212
2016		10,117
2017		9,704
Thereafter		83,054
Total		141,283
Rent expense		13,465	15,252	13,797
Area of portion of former facility lease terminated (in square feet)					51,000
Remaining area of lease (in square feet)					37,000
Area of remaining leased space subleased (in square feet)	23,000
Monthly sublease receipts	55
Kyte
Purchase Obligations
Equity ownership interest (as a percent)		70.00%
Residual percentage of ownership agreed to be acquired		30.00%
Market data
Purchase Obligations
Purchase commitments		22,879
Purchase commitments due within next twelve months		19,589
Purchase commitments due between one to three years		3,290
Network implementations
Purchase Obligations
Purchase commitments		6,135
Hosting and software license agreements
Purchase Obligations
Purchase commitments		490
Purchase commitments due within next twelve months		$ 3,161