Acquisition - Additional Information (Detail) (USD $)			1 Months Ended		6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Oct. 29, 2012 IRELAND [Member] Employees	Oct. 29, 2012 Design by Front Limited [Member]	Jun. 30, 2013 Design by Front Limited [Member]
Business Acquisition [Line Items]
Business acquisition, total purchase price				$ 4,600,000
Business acquisition				2,600,000
Contingent consideration payable				2,100,000
Date of acquisition					Oct. 29, 2012
Intangible asset balances increased due to acquisition				2,500,000
Goodwill associated with acquisition	$ 173,668,000	$ 174,294,000		$ 2,500,000
Number of employees joined in connection with the acquisition			13