Current Liabilities Components of Current Liabilities (Details) - USD ($)	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Salaries and wages	$ 34,185,000	$ 40,850,000
Taxes other than income taxes, primarily Value Added Taxes	21,052,000	24,743,000
Warranty cost	27,795,000	30,738,000
Supplemental Executive Retirement Program	11,564,000	21,517,000
Freight	6,517,000	6,202,000
Professional	5,594,000	6,613,000
Product liability, current portion	3,701,000	4,334,000
Rebates	1,882,000	1,722,000
Insurance	1,275,000	1,266,000
Interest	910,000	1,068,000
Derivative liabilities	2,744,000	2,526,000
Severance	2,930,000	4,209,000
Other items, principally trade accruals	13,546,000	9,911,000
Accrued expenses	133,695,000	$ 155,699,000
Payments for deferred compensation, Cash Based Arrangement	9,953,000
Payments for deferred compensation arrangements	1,013,000
Deferred Compensation, Cash Based Arrangement, Expected Payment within next twelve months	11,173,000
Payments for deferred compensation arrangements, Expected Payment within next twelve months	$ 2,512,000