Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2013

Office Leases [Member]

Future Minimum Lease Payments Under Leases and Agreements

As of March 31, 2013, future minimum lease payments under noncancelable office leases are as follows:

Remainder of 2013	$	4,970
2014		7,686
2015		8,655
2016		9,688
2017		9,436
Thereafter		40,087
Total	$	80,522

Third-Party Hosting Agreements [Member]

Future Minimum Lease Payments Under Leases and Agreements

The agreements include payment commitments that expire at various dates through mid-2017. As of March 31, 2013, future minimum payments under the agreements are as follows:

Remainder of 2013	$	2,902
2014		3,624
2015		3,734
2016		3,844
2017		775
Total	$	14,879