Restatement of Previously Issued Financial Statements - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Decrease in revenue due to adjustments	$ 10,000	$ 14,000	$ 12,000	$ 6,000
Decrease in remeasurment gains due to adjustments				$ 4,000
Liability for royalty credit earned	5,300
Interest expense paid in cash	$ 48,102	$ 48,224	$ 40,410
Sales Revenue, Services, Net | Customer Concentration Risk | Customer 1
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Concentration risk, percentage	14.00%	14.00%	14.00%
Accounts Receivable | Customer Concentration Risk | Customer 1
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Concentration risk, percentage	10.00%	14.00%
Accounts Receivable | Customer Concentration Risk | Customer 2
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Concentration risk, percentage		11.00%
As Previously Reported
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Interest expense paid in cash	$ 11,700
As Previously Reported | Sales Revenue, Services, Net | Customer Concentration Risk | Customer 1
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Concentration risk, percentage	10.00%
As Previously Reported | Accounts Receivable | Customer Concentration Risk | Customer 2
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Concentration risk, percentage		16.00%