Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule Of Deferred Tax Assets And Liabilities [Line Items]
Effective Income Tax Rate Reconciliation, Foreign Tax Withholdings, Amount	$ 400,000
Change in valuation allowance related to deferred tax liabilities acquired	14,186,000	$ 21,463,000	$ 32,692,000
Net operating loss carryforwards	74,700,000
Deferred tax assets related to the net operating losses	31,600,000	31,100,000
Unrecognized tax benefits, accrued interest		0
Unrecognized tax benefits, accrued penalties	0	0
Unrecognized tax benefits, impact on effective tax rate	400,000
Repatriate earnings of foreign subsidiaries	0	0	$ 0
Unrepatriated cash held in foreign bank accounts	2,500,000
Acquisitions [Member]
Schedule Of Deferred Tax Assets And Liabilities [Line Items]
Provision for income taxes, tax examination	$ 500,000
Change in valuation allowance related to deferred tax liabilities acquired		$ 1,400,000
Minimum [Member]
Schedule Of Deferred Tax Assets And Liabilities [Line Items]
Net operating loss carry forwards expiration date	2016
Maximum [Member]
Schedule Of Deferred Tax Assets And Liabilities [Line Items]
Net operating loss carry forwards expiration date	2035