CONTINGENT LIABILITIES AND COMMITMENTS (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013 employee	Sep. 30, 2012	Sep. 30, 2013 employee	Sep. 30, 2012
Concentration Risk [Line Items]
Total number of employees	3,175		3,175
Changes in the Company's warranty reserve
Balance, as of December 31, 2012			$ 7,852,000
Provision for warranty claims			5,120,000
Warranty claims paid			(4,801,000)
Foreign currency translation adjustment			(8,000)
Balance, as of September 30, 2013	8,163,000		8,163,000
Contingent liabilities and commitments, additional disclosure
Warranty expense	$ 1,600,000	$ 1,600,000	$ 5,100,000	$ 4,700,000
Unionized Employees Concentration Risk | Workforce Subject to Collective Bargaining Arrangements
Concentration Risk [Line Items]
Percentage of employees represented by unions			12.10%
Carpenters Union Local 1615
Concentration Risk [Line Items]
Total number of hourly employees covered in an agreement	185		185
Italy Unions
Concentration Risk [Line Items]
Total number of employees	200		200