Fair Value Measurements - Additional Information (Detail) - USD ($)		9 Months Ended	12 Months Ended
	Jul. 11, 2019	Sep. 30, 2019	Dec. 31, 2018
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Gain (loss) of the effective portion of change in fair value of foreign currency forward contracts		$ (3,196,000)	$ 713,000
Long-term debt and finance leases		120,657,000	121,284,000
Quoted Prices in Active Markets for Identical Assets Level (1)
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Fair value of long term debt		138,172,000	137,343,000
Foreign Currency Derivative
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Notional amount of derivative instruments		$ 185,097,000	$ 129,542,000
Foreign Currency Derivative | Maximum
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Maturity period of hedges		12 months
Interest Rate Swaps
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Notional amount of derivative instruments	$ 200,000,000
Variable interest rate of inters rate swap derivative instrument	1.72%
Derivatives Designated as Cash Flow Hedges
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Maturity period of hedges		3 years
Term Loan A Facility | Line of Credit | London Interbank Offered Rate (LIBOR)
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Basis points	1.50%