Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Debt - Additional Information (Detail)					1 Months Ended	9 Months Ended
Debt - Additional Information (Detail)	Jul. 06, 2017	Dec. 14, 2016	Sep. 30, 2016 USD ($)	Jun. 09, 2016 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) Institution SecurityLoan	Sep. 30, 2016 USD ($)	Aug. 31, 2017 USD ($)	Jul. 31, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Nov. 30, 2016 USD ($)
Debt Instrument [Line Items]
Applicable margin for Term Loan Credit agreement	2.25%
Leverage ratio	125.00%					125.00%
LIBOR floor rate	0.75%
Decrease in base rate borrowings margin	1.25%
Description of applicable margin	The Re-pricing Amendment 3 decreased the applicable margin for the Company’s term loan under the Credit Agreement to 2.25% when the Total Leverage Ratio (as defined in the Credit Agreement) is at or above 1.25:1 and to 2.00% when the Total Leverage Ratio is below 1.25:1, both with a LIBOR floor of 0.75%. The margin for base rate borrowings will decrease to 1.25% when the Total Leverage Ratio is at or above 1.25:1 and to 1.00% when the Total Leverage Ratio is below 1.25:1.
Interest expense						$ 23,001,000	$ 20,526,000
Interest expense period							5 months
Interest Rate Hedge [Member]
Debt Instrument [Line Items]
Interest rate swap agreement, maturity date			Sep. 30, 2020
Interest rate swap agreement, notional amount			$ 305,000,000		$ 305,000,000		$ 305,000,000
Interest rate swap agreement, credit spread rate						2.25%
Austria [Member]
Debt Instrument [Line Items]
Number of outstanding loans \| SecurityLoan						4
Interest on loans payable						Semi-annually
Japan [Member]
Debt Instrument [Line Items]
Borrowing capacity in the form of letters of credit						$ 20,444,000
Number of financial institutions for available lines of credit and borrowing arrangements \| Institution						2
Aggregate borrowings expire and renewed						3 month intervals
Total borrowings outstanding						$ 0					$ 0
Minimum [Member] \| Austria [Member]
Debt Instrument [Line Items]
Loan interest rate						0.75%
Maximum [Member] \| Austria [Member]
Debt Instrument [Line Items]
Loan interest rate						2.00%
Revolving Lines of Credit [Member]
Debt Instrument [Line Items]
Borrowing capacity in the form of letters of credit						$ 11,111,000
Revolving Lines of Credit [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Line of credit base interest rate						1.25%
Newport [Member] \| Term Loan Credit Agreement [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Secured term loan, face amount						$ 780,000,000
Debt instrument, interest rate terms						Borrowings under the Term Loan Facility bear interest per annum at one of the following rates selected by the Company: (a) a base rate determined by reference to the highest of (1) the federal funds effective rate plus 0.50%, (2) the “prime rate” quoted in The Wall Street Journal, (3) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for an interest period of one month adjusted for certain additional costs, plus 1.00%, and (4) a floor of 1.75%, plus, in each case, an applicable margin (that was initially 3.00% and was decreased as described below); or (b) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for the interest period relevant to such borrowing adjusted for certain additional costs, subject to a LIBOR rate floor of 0.75%, plus an applicable margin (that was initially 4.00% and was decreased as described below). The Company has elected the interest rate as described in clause (b). The Term Loan Facility was issued with original issue discount of 1.00% of the principal amount thereof.
Debt instrument, issue discount percentage on principal						1.00%
Newport [Member] \| Term Loan Credit Agreement [Member] \| Secured Debt [Member] \| Federal Funds Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate						0.50%
Newport [Member] \| Term Loan Credit Agreement [Member] \| Secured Debt [Member] \| Adjusted One Month LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate						1.00%
Period of Libor measurement						1 month
Newport [Member] \| Term Loan Credit Agreement [Member] \| Secured Debt [Member] \| Floor Rate [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate						1.75%
Newport [Member] \| Term Loan Credit Agreement [Member] \| Secured Debt [Member] \| Floor Rate [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate						3.00%
Newport [Member] \| Term Loan Credit Agreement [Member] \| Secured Debt [Member] \| LIBOR Floor Rate [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate						0.75%
Newport [Member] \| Term Loan Credit Agreement [Member] \| Secured Debt [Member] \| LIBOR Floor Rate [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate						4.00%
Newport [Member] \| Term Loan Credit Agreement [Member] \| Secured Debt Repricing Amendment 1 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate				2.50%
Debt instrument, pre-payment premium percentage				1.00%
Debt instrument, pre-payment premium				$ 7,300,000
Debt instrument, prepaid principal amount				$ 50,000,000
Debt instrument, prepaid amount					60,000,000
Deferred finance fees, original issue discount and re-pricing fee, gross						$ 28,747,000
Deferred finance fees, original issue discount and re-pricing fee, net						13,438,000
Newport [Member] \| Term Loan Credit Agreement [Member] \| Secured Debt Repricing Amendment 1 [Member] \| Interest Rate Hedge [Member]
Debt Instrument [Line Items]
Interest rate swap agreement, maturity date			Sep. 30, 2020
Interest rate swap agreement, notional amount			$ 335,000,000		$ 335,000,000	$ 305,000,000	$ 335,000,000
Interest rate swap agreement, interest rate			1.198%		1.198%		1.198%
Interest rate swap agreement, credit spread rate						2.25%
Newport [Member] \| Term Loan Credit Agreement [Member] \| Secured Debt Repricing Amendment 1 [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, quarterly payment percentage						0.25
Newport [Member] \| Term Loan Credit Agreement [Member] \| Secured Debt Repricing Amendment 1 [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate				3.50%
Newport [Member] \| Term Loan Credit Agreement [Member] \| Secured Debt Repricing Amendment 2 [Member]
Debt Instrument [Line Items]
Secured term loan, face amount						$ 448,464,000
Debt instrument, prepaid principal amount						325,000,000		$ 75,000,000	$ 50,000,000	$ 50,000,000		$ 40,000,000
Debt instrument, scheduled principal payments						6,536,000
Newport [Member] \| Term Loan Credit Agreement [Member] \| Secured Debt Repricing Amendment 2 [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate		2.75%
Newport [Member] \| Term Loan Credit Agreement [Member] \| Secured Debt Repricing Amendment 2 [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate		1.75%
Newport [Member] \| Asset Based Credit Agreement [Member]
Debt Instrument [Line Items]
Debt issuance cost capitalized						$ 1,201,000
Contractual term						5 years
Newport [Member] \| Asset Based Credit Agreement [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Secured term loan, face amount						$ 50,000,000
Debt instrument, interest rate terms						Borrowings under the ABL Facility bear interest per annum at one of the following rates selected by the Company: (a) a base rate determined by reference to the highest of (1) the federal funds effective rate plus 0.50%, (2) the “prime rate” quoted in The Wall Street Journal, and (3) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for an interest period of one month adjusted for certain additional costs, plus 1.00%, plus, in each case, an initial applicable margin of 0.75%; and (b) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for the interest period relevant to such borrowing adjusted for certain additional costs, plus an initial applicable margin of 1.75%.
Percentage of borrowing based on eligible accounts						85.00%
Percentage of borrowing based on lower of cost or market value of certain eligible inventory						65.00%
Percentage of borrowing based on net orderly liquidation value of certain eligible inventory						85.00%
Percentage of borrowing base						30.00%
Initial commitment fee percentage						0.375%
Total commitment fee recognized in interest expense						$ 242,000
Newport [Member] \| Asset Based Credit Agreement [Member] \| Secured Debt [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Percentage of borrowing based on book value of certain eligible accounts						70.00%
Newport [Member] \| Asset Based Credit Agreement [Member] \| Secured Debt [Member] \| Federal Funds Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate						0.50%
Newport [Member] \| Asset Based Credit Agreement [Member] \| Secured Debt [Member] \| Adjusted One Month LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate						1.00%
Period of Libor measurement						1 month
Newport [Member] \| Asset Based Credit Agreement [Member] \| Secured Debt [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate						1.75%
Newport [Member] \| Asset Based Credit Agreement [Member] \| Secured Debt [Member] \| Initial Margin Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate						0.75%
Newport [Member] \| Asset Based Credit Agreement [Member] \| Letter of Credit [Member]
Debt Instrument [Line Items]
Borrowing capacity in the form of letters of credit						$ 15,000,000