BASIS OF PRESENTATION - Fair Value of Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014 Senior Unsecured Notes 2013 9 3/4% Senior Unsecured Notes	Sep. 30, 2013 Senior Unsecured Notes 2013 9 3/4% Senior Unsecured Notes	Jun. 30, 2014 Senior Subordinated Notes 2004 7 1/8% Senior Subordinated Notes	Sep. 30, 2013 Senior Subordinated Notes 2004 7 1/8% Senior Subordinated Notes	Aug. 31, 2004 Senior Subordinated Notes 2004 7 1/8% Senior Subordinated Notes	Jun. 30, 2014 Senior Subordinated Notes 2005 6 7/8% Senior Subordinated Notes	Sep. 30, 2013 Senior Subordinated Notes 2005 6 7/8% Senior Subordinated Notes	Feb. 28, 2005 Senior Subordinated Notes 2005 6 7/8% Senior Subordinated Notes	Jun. 30, 2014 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes	Sep. 30, 2013 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes	Aug. 31, 2013 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes	Mar. 31, 2012 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes	Jun. 30, 2014 Fair Value, Inputs, Level 2 Senior Secured Credit Facility Bank Credit Facility	Jun. 30, 2014 Fair Value, Inputs, Level 2 Senior Secured Credit Facility Senior Secured Credit Facility - Term Loan A	Jun. 30, 2014 Fair Value, Inputs, Level 2 Senior Secured Credit Facility Senior Secured Credit Facility - Term Loan B	Jun. 30, 2014 Fair Value, Inputs, Level 2 Senior Unsecured Notes 2013 9 3/4% Senior Unsecured Notes	Jun. 30, 2014 Fair Value, Inputs, Level 2 Senior Subordinated Notes 2004 7 1/8% Senior Subordinated Notes	Jun. 30, 2014 Fair Value, Inputs, Level 2 Senior Subordinated Notes 2005 6 7/8% Senior Subordinated Notes	Jun. 30, 2014 Fair Value, Inputs, Level 2 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes	Jun. 30, 2014 Carrying Value Fair Value, Inputs, Level 2 Senior Secured Credit Facility Bank Credit Facility	Jun. 30, 2014 Carrying Value Fair Value, Inputs, Level 2 Senior Secured Credit Facility Senior Secured Credit Facility - Term Loan A	Jun. 30, 2014 Carrying Value Fair Value, Inputs, Level 2 Senior Secured Credit Facility Senior Secured Credit Facility - Term Loan B	Jun. 30, 2014 Carrying Value Fair Value, Inputs, Level 2 Senior Unsecured Notes 2013 9 3/4% Senior Unsecured Notes	Jun. 30, 2014 Carrying Value Fair Value, Inputs, Level 2 Senior Subordinated Notes 2004 7 1/8% Senior Subordinated Notes	Jun. 30, 2014 Carrying Value Fair Value, Inputs, Level 2 Senior Subordinated Notes 2005 6 7/8% Senior Subordinated Notes	Jun. 30, 2014 Carrying Value Fair Value, Inputs, Level 2 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Credit facility value													$ 19,700	$ 121,723						$ 20,000	$ 121,313
Note value															$ 738,153	$ 560,000	$ 21,103	$ 9,485	$ 277,254			$ 717,509	$ 500,000	$ 21,156	$ 9,654	$ 271,511
Note stated interest rate	9.75%	9.75%	7.125%	7.125%	7.125%	6.875%	6.875%	6.875%	11.00%	11.00%	11.00%	11.00%				9.75%	7.125%	6.875%	11.00%