COMMON STOCK (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Class of Stock [Line Items]
Common stock purchased and retired	$ 6,644,000
Minimum percentage of outstanding common stock held by two shareholders (in hundredths)	10.00%
Minimum percentage of common stock needs to held by shareholders having more than ten percent of Class A common stock as per class B Protection clause (in hundredths)	10.00%
Number of days from trigger date to purchase Class B common shares	90 days
Percentage of common stock held by shareholder one (in hundredths)	31.60%
Percentage of common stock held by shareholder two (in hundredths)	13.30%
Percentage shareholding of class B considered as per class B Protection clause	below 10%
Common stock dividends declared	3,200,000	3,200,000	3,200,000
Class A [Member]
Class of Stock [Line Items]
Common stock repurchased during the period (in shares)		0	0
Number of shareholders with ownership in excess of ten percent	2
Common stock dividends declared each quarter (in dollars per share)	$ 0.06	$ 0.06	$ 0.06
Class B [Member]
Class of Stock [Line Items]
Authorized amount of repurchase of outstanding Class B common shares	10,000,000
Common stock purchased and retired (in shares)	368,723
Common stock purchased and retired	$ 6,600,000
Common stock repurchased during the period (in shares)		0	0
Common stock dividends declared each quarter (in dollars per share)	$ 0.07	$ 0.07	$ 0.07