LONG-TERM DEBT - Senior Subordinated Notes (Details) (USD $)	Jun. 30, 2012	Sep. 30, 2011	Jun. 30, 2012 Senior Subordinated Notes [Member] 2002 8% Senior Subordinated Notes [Member]	Sep. 30, 2011 Senior Subordinated Notes [Member] 2002 8% Senior Subordinated Notes [Member]	Feb. 28, 2002 Senior Subordinated Notes [Member] 2002 8% Senior Subordinated Notes [Member]	Apr. 02, 2012 Senior Subordinated Notes [Member] 2002 8% Senior Subordinated Notes [Member] 2002 Senior Subordinated Notes [Member]	Jun. 30, 2012 Senior Subordinated Notes [Member] 2004 7 1/8% Senior Subordinated Notes [Member]	Mar. 06, 2012 Senior Subordinated Notes [Member] 2004 7 1/8% Senior Subordinated Notes [Member]	Sep. 30, 2011 Senior Subordinated Notes [Member] 2004 7 1/8% Senior Subordinated Notes [Member]	Aug. 31, 2004 Senior Subordinated Notes [Member] 2004 7 1/8% Senior Subordinated Notes [Member]	Jun. 30, 2012 Senior Subordinated Notes [Member] 2005 6 7/8% Senior Subordinated Notes [Member]	Mar. 06, 2012 Senior Subordinated Notes [Member] 2005 6 7/8% Senior Subordinated Notes [Member]	Sep. 30, 2011 Senior Subordinated Notes [Member] 2005 6 7/8% Senior Subordinated Notes [Member]	Feb. 28, 2005 Senior Subordinated Notes [Member] 2005 6 7/8% Senior Subordinated Notes [Member]	Jun. 30, 2012 Senior Subordinated Notes [Member] 2012 11 % Senior Subordinated Notes [Member]	Mar. 06, 2012 Senior Subordinated Notes [Member] 2012 11 % Senior Subordinated Notes [Member]	Sep. 30, 2011 Senior Subordinated Notes [Member] 2012 11 % Senior Subordinated Notes [Member]	Mar. 06, 2012 Senior Subordinated Notes [Member] 2012 11 % Senior Subordinated Notes [Member] 2004 Senior Subordinated Notes [Member]	Mar. 06, 2012 Senior Subordinated Notes [Member] 2012 11 % Senior Subordinated Notes [Member] 2005 Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Loan face amount					$ 250,000,000					$ 225,000,000				$ 150,000,000		$ 344,200,000
Note stated interest rate			8.00%		8.00%		7.125%			7.125%	6.875%			6.875%	11.00%	11.00%
Redeemable rate before cutoff																100.00%
Redeemable rate after cutoff																101.00%
Redeemable rate upon certain conditions																100.00%
Principal amount tendered and exchanged								203,800,000				140,300,000						203,800,000	140,300,000
Debt outstanding	1,652,996,000	1,629,775,000	0	250,000,000			21,156,000		225,000,000		9,654,000		150,000,000		344,190,000		0
Payment in Kind (PIK) interest rate																2.00%
Accrued interest	46,614,000	28,580,000		10,000,000			525,000		2,000,000		222,000		1,300,000		12,100,000
Debt outstanding before discount						$ 66,500,000