Commitments and Contingencies - Additional Information (Detail)	0 Months Ended	3 Months Ended		6 Months Ended
	Nov. 21, 2012 Patents	Jun. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)	Jul. 31, 2014 Hungary [Member] Subsequent Event [Member] USD ($)	Jul. 31, 2014 Hungary [Member] Subsequent Event [Member] EUR (€)
Commitments And Guarantees [Line Items]
Minimum lease payments		$ 51,472,000		$ 51,472,000		$ 7,800,000	€ 5,700,000
Lease agreement bank guarantee						483,000	354,000
Rent expense under all leases		1,700,000	1,600,000	3,400,000	2,700,000
Hosting fees incurred		$ 1,200,000	$ 1,300,000	$ 2,400,000	$ 2,300,000
Number of patents involved in infringement lawsuit	3