Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Significant Accounting Policies Summary [Line Items]
Depreciation expense		$ 15.1	$ 16.4	$ 16.7
Research and development costs		7.0	7.4	6.3
Compensation expense	$ 0.1	$ 2.6	$ 2.9	$ 2.7
Forward Contracts | Minimum
Schedule Of Significant Accounting Policies Summary [Line Items]
Foreign exchange contract term		1 month
Forward Contracts | Maximum
Schedule Of Significant Accounting Policies Summary [Line Items]
Foreign exchange contract term		18 months
Accounts Receivable
Schedule Of Significant Accounting Policies Summary [Line Items]
Percentage of major customer net receivables to total receivables			67.00%
Customer Concentration Risk | Accounts Receivable
Schedule Of Significant Accounting Policies Summary [Line Items]
Percentage of major customer net receivables to total receivables		64.00%
Accounting Standards Update 2016-09
Schedule Of Significant Accounting Policies Summary [Line Items]
Compensation expense		$ 0.1
Deferred tax asset		2.3
Other Assets | Accounting Standards Update 2015-03
Schedule Of Significant Accounting Policies Summary [Line Items]
Deferred financing fees			$ (2.6)
Long-term Debt | Accounting Standards Update 2015-03
Schedule Of Significant Accounting Policies Summary [Line Items]
Deferred financing fees			2.6
Retained Deficit | Accounting Standards Update 2016-09
Schedule Of Significant Accounting Policies Summary [Line Items]
Effect of new accounting pronouncement		$ 2.3
Scenario, Previously Reported
Schedule Of Significant Accounting Policies Summary [Line Items]
Long-term debt			$ 235.0