RETIREMENT FUND AND PROFIT SHARING PLAN (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Balance sheet amounts [Abstract]
Minimum pension obligation and unfunded pension liability	$ 11,964,000		$ 11,964,000		$ 11,045,000
SERP [Member]
Components of SERP expense [Abstract]
Service cost	139,000	109,000	417,000	327,000
Interest cost	112,000	104,000	337,000	312,000
Amortization of adjustments	77,000	58,000	231,000	174,000
Total SERP expense	328,000	271,000	985,000	813,000
Balance sheet amounts [Abstract]
Minimum pension obligation and unfunded pension liability	11,964,000		11,964,000		11,045,000
Amounts recognized in accumulated other comprehensive loss, pretax [Abstract]
Prior service cost	931,000		931,000		877,000
Net gains	2,764,000		2,764,000		2,884,000
Total amounts recognized in accumulated other comprehensive loss	3,695,000		3,695,000		3,761,000
401(k) Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer match of the first 1% of compensation contributed by participants (in hundredths)			100.00%
Percentage of participant contribution under condition one (in hundredths)	1.00%		1.00%
Employer match of the next 5% compensation contributed by participants (in hundredths)			50.00%
Percentage of employee deferrals under condition two (in hundredths)	5.00%		5.00%
Compensation expense	100,000	100,000	400,000	400,000
401(k) Plan [Member] | Class A [Member]
Defined Benefit Plan Disclosure [Line Items]
Shares owned by plan (in shares)	14,911		14,911
401(k) Plan [Member] | Class B [Member]
Defined Benefit Plan Disclosure [Line Items]
Shares owned by plan (in shares)	203,069		203,069
Non-defined Retirement Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Maximum annual contribution by eligible employee (in hundredths)			5.00%
Minimum employer contribution to plan (in hundredths)			5.00%
Employer contribution of eligible salary (in hundredths)			7.00%
Compensation expense	$ 100,000	$ 100,000	$ 200,000	$ 200,000
Non-defined Retirement Fund [Member] | Class A [Member]
Defined Benefit Plan Disclosure [Line Items]
Shares owned by plan (in shares)	3,323		3,323
Non-defined Retirement Fund [Member] | Class B [Member]
Defined Benefit Plan Disclosure [Line Items]
Shares owned by plan (in shares)	17,342		17,342