CONTINGENT LIABILITIES AND COMMITMENTS (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Changes in the Company's warranty reserve
Balance, as of December 31, 2013			$ 8,214,000
Provision for warranty claims			3,364,000
Warranty claims paid			(3,269,000)
Balance, as of June 30, 2014	8,309,000		8,309,000
Contingent liabilities and commitments, additional disclosure
Warranty expense	$ 1,700,000	$ 1,800,000	$ 3,400,000	$ 3,500,000