EMPLOYEE BENEFIT PLANS - COMPANY'S PENSION ASSETS MEASURED AT FAIR VALUE (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	$ 8,630,000	$ 7,666,000	$ 7,660,000
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Net loss (gain)	954,000	427,000	111,000
Amortization of net loss	(69,000)	(34,000)	(32,000)
Total expense (income) recognized in other comprehensive income	885,000	393,000	79,000
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Amounts Recognized in Accumulated Other Comprehensive Income (Loss), before Tax	2,500,000	1,600,000	1,200,000
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	133,000
Defined Benefit Plan, Information about Plan Assets [Abstract]
Defined Benefit Plan, Debt Securities	100.00%	100.00%
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Estimated future employer contributions in next fiscal year	243,000
2013	307,000
2014	305,000
2015	337,000
2016	370,000
2017	385,000
Thereafter	2,207,000
Contributions expensed by employer	471,000	254,000
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	6,524,000	5,520,000
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	2,106,000	2,146,000
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	2,520,000	2,146,000
Defined Benefit Plan, Information about Plan Assets [Abstract]
Defined Benefit Plan, Debt Securities	29.00%	28.00%
Canadian Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	2,520,000	2,146,000
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	2,106,000	2,146,000
Defined Benefit Plan, Information about Plan Assets [Abstract]
Defined Benefit Plan, Debt Securities	25.00%	28.00%
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	2,106,000	2,146,000
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	1,502,000	1,304,000
Defined Benefit Plan, Information about Plan Assets [Abstract]
Defined Benefit Plan, Debt Securities	18.00%	17.00%
United States Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	1,502,000	1,304,000
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	1,329,000	1,073,000
Defined Benefit Plan, Information about Plan Assets [Abstract]
Defined Benefit Plan, Debt Securities	15.00%	14.00%
International Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	1,329,000	1,073,000
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
Canadian government bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	716,000	690,000
Defined Benefit Plan, Information about Plan Assets [Abstract]
Defined Benefit Plan, Debt Securities	8.00%	9.00%
Canadian government bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	716,000	690,000
Canadian government bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension assets measured at fair value	0	0
Canadian government bonds [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	457,000	307,000
Defined Benefit Plan, Information about Plan Assets [Abstract]
Defined Benefit Plan, Debt Securities	5.00%	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	457,000	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
Equity Securities [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation Percentage of Assets, Equity Securities	55.00%
Debt Securities [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation Percentage of Assets, Equity Securities	39.00%
Cash [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation Percentage of Assets, Equity Securities	6.00%