Summary of Operations and Significant Accounting Policies - Additional Information (Details) shares in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2018	Dec. 31, 2017 USD ($) Segment shares	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 USD ($) shares
Summary Of Operations And Significant Accounting Policies [Line Items]
Product returns and other allowances			$ 158,100,000	$ 132,900,000	$ 113,500,000
Allowance for doubtful accounts	$ 4,500,000		$ 4,500,000	2,100,000
Number of operating segment | Segment			1
Impairment of goodwill			$ 0	$ 0	$ 0
U.S. federal corporate tax rate			35.00%	35.00%	35.00%
Net tax expense related to the Tax Act	45,908,000
Shipping, Handling and Transportation Costs			$ 15,200,000	$ 14,200,000	$ 8,300,000
Options and share grants outstanding | shares			3.5	1.4	1.4
Foreign exchange transaction (losses) gains			$ (7,995,000)	$ 2,171,000	$ 1,257,000
Accumulated other comprehensive loss	$ 83,480,000		83,480,000	112,666,000	84,400,000
Increase in deferred income tax assets due to effect on adoption			(25,326,000)	15,978,000	(1,484,000)
Increase in additional paid in capital due to effect on adoption				$ (567,000)	$ (4,029,000)
ASU No. 2016-09 | Adoption Related to Income Tax Portion [Member]
Summary Of Operations And Significant Accounting Policies [Line Items]
Increase (decrease) in retained earnings due to effect on adoption			4,800,000
Increase in deferred income tax assets due to effect on adoption			4,800,000
ASU No. 2016-09 | Adoption Related to Forfeitures [Member]
Summary Of Operations And Significant Accounting Policies [Line Items]
Increase (decrease) in retained earnings due to effect on adoption			(500,000)
Increase in deferred income tax assets due to effect on adoption			300,000
Increase in additional paid in capital due to effect on adoption			$ 800,000
Restricted Stock
Summary Of Operations And Significant Accounting Policies [Line Items]
Requisite service period			4 years
Scenario, Forecast
Summary Of Operations And Significant Accounting Policies [Line Items]
U.S. federal corporate tax rate		21.00%
Minimum | Building
Summary Of Operations And Significant Accounting Policies [Line Items]
Estimated useful lives			20 years
Minimum | Machinery and Equipment
Summary Of Operations And Significant Accounting Policies [Line Items]
Estimated useful lives			3 years
Minimum | Leaseholds and Leasehold Improvements
Summary Of Operations And Significant Accounting Policies [Line Items]
Estimated useful lives			3 years
Maximum | Building
Summary Of Operations And Significant Accounting Policies [Line Items]
Estimated useful lives			55 years
Maximum | Machinery and Equipment
Summary Of Operations And Significant Accounting Policies [Line Items]
Estimated useful lives			10 years
Maximum | Leaseholds and Leasehold Improvements
Summary Of Operations And Significant Accounting Policies [Line Items]
Estimated useful lives			5 years