EMPLOYEE BENEFIT PLANS (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Number of active non-supervisory Canadian employees	20
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 218,000	$ 156,000	$ 144,000
Interest cost	457,000	462,000	421,000
Expected return on fair value of assets	(452,000)	(502,000)	(466,000)
Actuarial loss	69,000	35,000	31,000
Net periodic pension cost	292,000	151,000	130,000
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	4.40%	5.40%	5.75%
Expected Return on Fair Value of Assets	5.75%	6.50%	6.75%
Rate of compensation increase	3.75%	3.75%	3.75%
Adjustment for investment and custodial fees (percent)	0.65%
Accumulated benefit obligation	9,300,000	7,700,000
Benefit obligation at the beginning of the year	8,227,000	7,933,000
Employee contributions	38,000	50,000
Actuarial gain	1,283,000	39,000
Currency translation	197,000	(163,000)
Benefit obligation at the end of the year	9,909,000	8,227,000	7,933,000
Fair value of plan assets at beginning of year	7,666,000	7,660,000
Actual return on plan assets	785,000	102,000
Employer contributions	471,000	254,000
Benefits Paid	(511,000)	(250,000)
Currency translation	181,000	(150,000)
Fair value of plan assets at beginning of year	8,630,000	7,666,000	7,660,000
Unfunded pension liability (included in other long-term liabilities)	$ (1,279,000)	$ (561,000)