EMPLOYEE BENEFIT PLANS - COMPANY'S PENSION ASSETS MEASURED AT FAIR VALUE (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	$ 7,666,000	$ 7,660,000	$ 6,683,000
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Net loss (gain)	427,000	111,000	(701,000)
Amortization of net loss	(34,000)	(32,000)	(85,000)
Total expense (income) recognized in other comprehensive income	393,000	79,000	(786,000)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Amounts Recognized in Accumulated Other Comprehensive Income (Loss), before Tax	1,600,000	1,200,000	1,100,000
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Estimated net loss amortized into net periodic benefit cost	67,000
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation Percentage of Assets, Equity Securities	60.00%
Target Allocation Percentage of Assets, Debt Securities	35.00%
Target Allocation Percentage of Assets, Cash	5.00%
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Estimated future employer contributions in next fiscal year	215,000
2012	283,000
2013	290,000
2014	285,000
2015	321,000
2016	348,000
2017-2021	1,933,000
Contributions expensed by employer	254,000	406,000
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	5,520,000	5,439,000
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	2,146,000	2,221,000
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	0	0
Canadian Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	2,146,000	2,298,000
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]
Defined Benefit Plan, Equity Securities	28.00%	30.00%
Canadian Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	2,146,000	2,298,000
Canadian Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	0	0
Canadian Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	0	0
Canadian Corporate Securities and Other Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	2,146,000	2,221,000
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]
Defined Benefit Plan, Debt Securities	28.00%	29.00%
Canadian Corporate Securities and Other Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	0	0
Canadian Corporate Securities and Other Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	2,146,000	2,221,000
Canadian Corporate Securities and Other Bonds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	0	0
United States Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	1,304,000	1,226,000
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]
Defined Benefit Plan, Equity Securities	17.00%	16.00%
United States Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	1,304,000	1,226,000
United States Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	0	0
United States Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	0	0
International Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	1,073,000	1,072,000
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]
Defined Benefit Plan, Equity Securities	14.00%	14.00%
International Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	1,073,000	1,072,000
International Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	0	0
International Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	0	0
Foreign Government Debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	690,000	536,000
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]
Defined Benefit Plan, Other Plan Assets	9.00%	7.00%
Foreign Government Debt [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	690,000	536,000
Foreign Government Debt [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	0	0
Foreign Government Debt [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	0	0
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	307,000	307,000
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]
Defined Benefit Plan, Other Plan Assets	4.00%	4.00%
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	307,000	307,000
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	0	0
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	$ 0	$ 0