LONG-TERM DEBT (Details) (USD $)			12 Months Ended
	Dec. 31, 2012	Nov. 15, 2011 Old Credit Facility	Dec. 31, 2012 New Credit Facility	Dec. 31, 2012 New Credit Facility Actual	Dec. 31, 2012 New Credit Facility Minimum	Dec. 31, 2012 New Credit Facility Minimum Requirement	Dec. 31, 2012 New Credit Facility Maximum Requirement
Long-term debt
Maximum borrowing capacity		$ 60,000,000	$ 100,000,000
Number of trailing quarters during which certain financial ratios are to be maintained and minimum level of EBITDA is to be achieved			12 months
Leverage ratio				2.02			3.25
Fixed charge coverage ratio				13.5		1.15
Reduction in maximum borrowing capacity per quarter (as a percent)			1.50%
Amount in which the maximum borrowing capacity may be permanently reduced					500,000
Multiple which may be used to permanently reduce the maximum borrowing capacity under the credit facility			50,000
Maturities of Borrowings Under New Credit Facility
Thereafter	81,100,000
Total	81,100,000
One-time fees and other loan costs			1,600,000
Outstanding amount			$ 81,100,000
Variable interest rate base			LIBOR
Percentage points added to the reference rate			2.25%
One-month LIBOR interest rate (as a percent)			0.21%
Period over which sufficient resources are needed to fund the entity's operations, meet its debt obligations, and fulfill its capital expenditure plans			12 months