CREDIT AGREEMENT (Detail Textuals) (Revolving credit facility, USD $)	12 Months Ended
	Dec. 31, 2012
Line of Credit Facility [Line Items]
Interest rate	1.96%
Amount of outstanding borrowings	$ 22,000,000
Outstanding letters of credit	946,000
Credit agreement, Due on October 10, 2015
Line of Credit Facility [Line Items]
Amount of borrowings	40,000,000
Interest payable on outstanding borrowings	LIBOR plus 1.75%
Sub-limit for trade and stand-by letters of credit	5,000,000
Minimum liquid assets	$ 10,000,000