Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended				12 Months Ended
	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Internal Revenue Service (IRS)	Dec. 31, 2013 State and Local Jurisdiction	Dec. 31, 2013 Federal	Dec. 31, 2013 Unrecognized Tax Benefits Before Interest And Penalties [Member]	Dec. 31, 2012 Unrecognized Tax Benefits Before Interest And Penalties [Member]
Income Taxes [Line Items]
Accrued current taxes payable		$ 16,200,000
Tax years under examination					Our U.S. federal tax returns for 2010 and subsequent years remain open to examination. Our California tax returns for 2008 and subsequent tax years remain open to examination. Massachusetts tax returns for 2008, 2010 and subsequent years remain open to examination.
Prior period tax expense adjustment	3,000,000
Current taxes receivable			(8,600,000)
Federal net operating loss carryforwards		16,000,000		0
State net operating loss carryforward		7,800,000		0
Foreign net operating loss carryforwards		19,000,000	11,000,000
Federal and state net operating loss carryforwards subject to limitations						2,000,000	7,000,000
Valuation allowance		(10,006,000)	(8,539,000)
Unrecognized tax benefit		343,000	444,000					252,000	284,000
Reduction in income tax expense resulting from recognition of unrecognized tax benefit		$ 300,000