LONG-TERM DEBT (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Nov. 15, 2011
Maturities of Borrowings Under New Credit Facility
Thereafter	$ 56,300,000
Total	56,300,000
Credit Facility
Long-term debt
Maximum borrowing capacity	97,000,000	60,000,000
Multiple which may be used to permanently reduce the maximum borrowing capacity under the credit facility	50,000
Reduction in maximum borrowing capacity	1,500,000
Maturities of Borrowings Under New Credit Facility
Variable interest rate base	LIBOR
Percentage points added to the reference rate	1.50%
One-month LIBOR interest rate (as a percent)	0.18%
Credit Facility | Actual
Long-term debt
Leverage ratio	1.2
Fixed charge coverage ratio	13.7
Credit Facility | Minimum
Long-term debt
Amount in which the maximum borrowing capacity may be permanently reduced	$ 500,000
Credit Facility | Minimum | Requirement
Long-term debt
Fixed charge coverage ratio	1.15
Credit Facility | Maximum | Requirement
Long-term debt
Leverage ratio	3.0