LONG-TERM LIABILITIES (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended	9 Months Ended
	Aug. 01, 2017	Nov. 09, 2015	May. 22, 2015	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Aug. 11, 2014
LONG-TERM LIABILITIES
Line of Credit							$ 134,749
First lien credit facility				$ 219,665	$ 219,665
Convertible Debentures				1,636	1,636		1,636
Senior Notes				230,410	230,410		300,000
Discount on Senior Notes				(2,727)	(2,727)		(3,947)
Contingent Earn-Out				6,931	6,931		6,531
Asset retirement obligations				30,954	30,954		29,771
Total long-term liabilities				486,869	486,869		468,740
Less current portion				382	382		382
Long-term portion				486,487	486,487		$ 468,358
Long-term liabilities
Draw downs from additional borrowings					189,559	$ 371,599
Gain on retirement of debt					14,407
Credit Facility | The "First Lien Credit Facility"
Long-term liabilities
Term of loan			5 years
Borrowing capacity			$ 250,000
Additional borrowing capacity			$ 30,000
Accrued interest				$ 0	$ 0
Draw downs from additional borrowings		$ 15,000
Outstanding borrowing amount		$ 234,700
Credit Facility | The "First Lien Credit Facility" | LIBOR
Long-term liabilities
Variable rate basis					LIBOR
Interest rate (as a percent)			8.50%
Interest rate during the period (as a percent)					9.50%
Credit Facility | Certain Lenders | The "First Lien Credit Facility"
Long-term liabilities
Borrowing capacity			$ 172,500
Additional borrowing capacity			30,000
Amount of Lien Credit Facility exchanged from Senior Notes			$ 45,230
Minimum | Credit Facility | The "First Lien Credit Facility" | LIBOR
Long-term liabilities
Margin (as a percent)			1.00%
Credit Facility | The "First Lien Credit Facility"
Long-term liabilities
Amount of Lien Credit Facility exchanged from Senior Notes			$ 47,000
Credit Facility | Certain Lenders | The "First Lien Credit Facility"
Long-term liabilities
Accrued unpaid interest rolled into the First Lien Term Loans			1,930
Secured Convertible Debentures
Long-term liabilities
Percentage of principal amount at which debentures may be converted from the date of issuance until maturity into common stock					100.00%
Conversion price (in dollars per share)				$ 50	$ 50
Amount of bond redemptions				$ 0	$ 0
Secured Convertible Debentures | Maximum
Long-term liabilities
Percentage of issued and outstanding debentures may be converted each year					10.00%
Senior Notes.
Long-term liabilities
Interest rate (as a percent)				9.00%	9.00%
Percentage on initial purchase price								98.617%
Gain on retirement of debt					$ 14,400
Senior notes, face amount				$ 230,410	230,410
Senior notes, market value				$ 50,700	$ 50,700
Senior Notes. | Certain Lenders
Long-term liabilities
Face Value of Senior Notes exchanged to Lien Credit Facility			$ 69,590
Senior Notes. | Maximum | Forecast
Long-term liabilities
Percentage of Senior Notes can be redeemed on or after August 1, 2017	35.00%