CONTINGENT LIABILITIES AND COMMITMENTS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 employee	Dec. 31, 2012	Dec. 31, 2011	Dec. 30, 2010
Concentration Risk [Line Items]
Total number of employees	3,167
Changes in warranty reserve
Balance, as of December 31, 2012	$ 7,852	$ 8,146		$ 8,090
Provision for warranty claims	7,092	6,488	7,007
Warranty claims paid	(6,716)	(6,887)	(6,950)
Increase due to acquisition	0	106	0
Foreign currency translation adjustment	(14)	(1)	(1)
Balance, as of December 31, 2013	$ 8,214	$ 7,852	$ 8,146	$ 8,090
Unionized Employees Concentration Risk | Workforce Subject to Collective Bargaining Arrangements
Concentration Risk [Line Items]
Percentage of employees represented by unions	12.40%
Carpenters Union Local 1615
Concentration Risk [Line Items]
Total number of hourly employees covered in an agreement	191
Italy Unions
Concentration Risk [Line Items]
Total number of employees	202