Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current [Abstract]
Domestic		$ 26,821	$ 30,742	$ 33,156
Foreign		3,180	3,139	3,628
Total current		30,001	33,881	36,784
Deferred [Abstract]
Domestic		(10,132)	18,833	(387)
Foreign		108	98	(239)
Total deferred		(10,024)	18,931	(626)
Total income tax provision		19,977	52,812	36,158
Reconciliations Between Taxes at the U.S. Federal Income Tax Rate and Taxes at our Effective Income Tax Rate on Earnings [Abstract]
U.S. Federal income tax rate of 21% in 2018, 35% in 2017 and 35% in 2016		16,135	33,755	34,500
Increase (decrease) in tax rate resulting from [Abstract]
State and local income taxes, net of federal income tax benefit		2,781	3,138	2,944
Income tax (tax benefits) attributable to foreign income		1,598	(149)	(887)
Other non-deductible items, net		(559)	(1,319)	(464)
Impact of Tax Cuts and Jobs Act		0	17,515	0
Change in valuation allowance		22	(128)	65
Total income tax provision		$ 19,977	$ 52,812	$ 36,158
U.S. Federal income tax rate		21.00%	35.00%	35.00%
Provisional income tax expense, deferred tax assets	$ 16,100
Provisional deemed repatriation tax on earnings of foreign subsidiaries	1,400
Gross repatriation tax		$ 2,700	$ 2,300
Foreign tax credits			900
Deferred tax assets [Abstract]
Inventories	11,498	12,798	11,498
Allowance for customer returns	8,678	16,836	8,678
Postretirement benefits	170	58	170
Allowance for doubtful accounts	1,181	1,371	1,181
Accrued salaries and benefits	8,500	9,147	8,500
Capital loss	154	0	154
Tax credit carryforwards	272	272	272
Deferred gain on building sale	55	0	55
Accrued asbestos liabilities	8,886	11,872	8,886
Other	0	127	0
Deferred tax assets, gross	39,394	52,481	39,394
Valuation allowance	(377)	(399)	(377)
Total deferred tax assets	39,017	52,082	39,017
Deferred tax liabilities [Abstract]
Depreciation	5,495	7,755	5,495
Other	1,102	1,993	1,102
Total deferred tax liabilities	6,597	9,748	6,597
Net deferred tax assets	32,420	42,334	32,420
Valuation allowance, remaining amount		400
Income Tax Contingency [Abstract]
Recognized uncertain tax positions	$ 0	0	$ 0	$ 0
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Abstract]
Operating Loss Carryforwards		$ 42,300
Operating Loss Carryforwards, Expiration Dates		Dec. 31, 2021
Tax credit carryforward		$ 300
Foreign Tax Authority [Member] | Minimum [Member]
Income Tax Contingency [Abstract]
Period for statutes of limitations		2 years
Foreign Tax Authority [Member] | Maximum [Member]
Income Tax Contingency [Abstract]
Period for statutes of limitations		6 years
Canada Tax Authority [Member]
Income Tax Contingency [Abstract]
Open Tax Years		2014 2015 2016 2017
Hong Kong Tax Authority [Member]
Income Tax Contingency [Abstract]
Open Tax Years		2013 2014 2015 2016 2017
Mexican Tax Authority [Member]
Income Tax Contingency [Abstract]
Open Tax Years		2014 2015 2016 2017
Poland Tax Authority [Member]
Income Tax Contingency [Abstract]
Open Tax Years		2013 2014 2015 2016 2017
State and Local [Member]
Income Tax Contingency [Abstract]
Open Tax Years		2014 2015 2016 2017