EMPLOYEE BENEFIT PLANS (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Number of active non-supervisory Canadian employees	26
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 156,000	$ 144,000	$ 115,000
Interest cost	462,000	421,000	416,000
Expected return on fair value of assets	(502,000)	(466,000)	(368,000)
Actuarial loss	35,000	31,000	78,000
Net periodic pension cost	151,000	130,000	241,000
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	5.40%	5.75%	5.75%
Expected Return on Fair Value of Assets	6.50%	6.75%	6.75%
Rate of compensation increase	3.75%	3.75%	3.25%
Adjustment for investment and custodial fees (percent)	0.70%
Accumulated benefit obligation	7,700,000	7,700,000
Benefit obligation at the beginning of the year	7,933,000	7,138,000
Employee contributions	50,000	27,000
Actuarial gain	39,000	87,000
Currency translation	(163,000)	369,000
Benefit obligation at the end of the year	8,227,000	7,933,000	7,138,000
Fair value of plan assets at beginning of year	7,660,000	6,683,000
Actual return on plan assets	102,000	445,000
Employer contributions	254,000	406,000
Benefits Paid	(250,000)	(253,000)
Currency translation	(150,000)	352,000
Fair value of plan assets at beginning of year	7,666,000	7,660,000	6,683,000
Unfunded pension liability (included in other long-term liabilities)	$ (561,000)	$ (273,000)