Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended		0 Months Ended			1 Months Ended	12 Months Ended			12 Months Ended		1 Months Ended	12 Months Ended			12 Months Ended		1 Months Ended			12 Months Ended					1 Months Ended		0 Months Ended		12 Months Ended
	Mar. 31, 2011	Sep. 30, 2012	Sep. 30, 2011	Oct. 17, 2012 Holdings	Oct. 11, 2012 Holdings	Dec. 30, 2011 Term loan B-1	Oct. 31, 2010 Term loan B-1	Sep. 30, 2012 Term loan B-1	Sep. 30, 2011 Term loan B-1	Mar. 01, 2011 Term loan B-1	Sep. 30, 2012 Term loan B-1 Eurodollar (LIBOR)	Sep. 30, 2012 Term loan B-1 Base rate	Oct. 31, 2010 Revolving credit facility	Sep. 30, 2012 Revolving credit facility	Mar. 01, 2011 Revolving credit facility	Oct. 02, 2010 Revolving credit facility	Sep. 30, 2012 Revolving credit facility Eurodollar (LIBOR)	Sep. 30, 2012 Revolving credit facility Base rate	Oct. 31, 2010 Notes	Sep. 30, 2012 Notes	Sep. 30, 2011 Notes	Sep. 30, 2012 Notes On or after October 1, 2014	Sep. 30, 2012 Notes On or after October 1, 2015	Sep. 30, 2012 Notes On and after October 1, 2016 and thereafter	Sep. 30, 2012 Notes Prior to October 1, 2014	Oct. 02, 2010 Term loan A	Mar. 31, 2011 Term loan B	Oct. 02, 2010 Term loan B	Oct. 11, 2012 Holdco Notes	Oct. 17, 2012 Holdco Notes Holdings	Sep. 30, 2012 Holdco Notes Holdings Equal or exceed 75%, but less than 100%	Sep. 30, 2012 Holdco Notes Holdings Equal or exceed 50%, but less than 75%	Sep. 30, 2012 Holdco Notes Holdings Equal or exceed 25%, but less than 50%	Sep. 30, 2012 Holdco Notes Minimum Holdings Equal or exceed 75%, but less than 100%	Sep. 30, 2012 Holdco Notes Minimum Holdings Equal or exceed 50%, but less than 75%	Sep. 30, 2012 Holdco Notes Minimum Holdings Equal or exceed 25%, but less than 50%	Sep. 30, 2012 Holdco Notes Maximum Holdings Equal or exceed 75%, but less than 100%	Sep. 30, 2012 Holdco Notes Maximum Holdings Equal or exceed 50%, but less than 75%	Sep. 30, 2012 Holdco Notes Maximum Holdings Equal or exceed 25%, but less than 50%	Sep. 30, 2012 Holdco Notes Maximum Holdings Less than 25%
Long-Term Debt
Long-term debt, gross		$ 2,157,500	$ 2,386,875					$ 1,507,500	$ 1,736,875											$ 650,000	$ 650,000
Less: current portion			17,500
Total long-term debt		2,157,500	2,369,375
Face amount of debt										1,750,000																250,000		1,500,000
Borrowing capacity															200,000	250,000
Reference rate for variable interest rate											Eurodollar (LIBOR)	Base rate					Eurodollar (LIBOR)	Base rate
Floor for reference rate (as a percent)											1.00%	2.00%
Margin rate over reference rate (as a percent)											3.25%	2.25%					3.25%	2.25%
Write off deferred financing cost	20,824	9,289	20,824			9,289
Write off premium																											2,394
Termination costs on interest rate swap contracts	1,525
Financing costs capitalized																											24,320		6,000
Bank fees																											11,714
Remaining portion of the call premium capitalized																											12,606
Future principal payments						225,000
Debt issued																			650,000											550,000
Cash interest rate (as a percent)																														7.75%
PIK interest (as a percent)																														8.50%
Dividend paid				$ 722,000	$ 194,040
Percentage of consolidated net income used to calculate cumulative credit due to amendment in credit agreement																													50.00%
Interest rate on debt instrument (as a percent)																				9.00%
Unused line fee percentage														0.50%
Fronting fee Percentage														0.25%
Maturity term of debt instrument							7 years						5 years
Additional prepayment as a percentage of excess cash flows								50.00%
Redemption price as a percentage of principal amount																						104.50%	102.25%	100.00%	100.00%
Applicable amount for interest period expressed as a percentage of the aggregate amount of cash interest																																		75.00%	50.00%	25.00%	100.00%	75.00%	50.00%	25.00%
Percentage of outstanding principal amount in which interest is payable by increasing the principal amount of outstanding notes or by issuing PIK Notes equal to such interest																															25.00%
Percentage of outstanding principal amount in which interest is payable in kind																																50.00%	75.00%
Percentage of outstanding principal amount in which interest is payable in cash																															75.00%	50.00%	25.00%