Other Long-Term Obligations (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Apr. 23, 2015
Other Liabilities Disclosure [Abstract]
Deferred income taxes	$ 22,894,000		$ 23,376,000
Product liability	14,153,000		13,414,000
Pension	7,245,000		7,006,000
Deferred gain on sale leaseback	5,741,000		5,819,000
Supplemental Executive Retirement Plan liability	5,370,000		5,433,000
Deferred compensation	5,089,000		5,354,000
Uncertain tax obligation including interest	2,585,000		2,612,000
Other	4,752,000		3,935,000
Other Long-Term Obligations	67,829,000		$ 66,949,000
Sale Leaseback Transaction, Deferred Gain, Gross				$ 7,414,000
Sale Leaseback Transaction, Current Period Gain Recognized	$ 75,000	$ 73,000