Related Party Transactions (Details) (USD $) In Thousands, unless otherwise specified				3 Months Ended		6 Months Ended
	Mar. 31, 2014	Sep. 30, 2013	Mar. 31, 2014 Holdings Holdco Notes	Mar. 31, 2014 Carlyle	Mar. 31, 2013 Carlyle	Mar. 31, 2014 Carlyle	Mar. 31, 2013 Carlyle
Related party transactions
Expected annual consulting fee						$ 3,000
Expenses incurred from transactions with related party				750	750	1,500	1,500
Out of pocket expenditures paid to related party				39	29	368	311
Debt issued	$ 2,158,589	$ 2,158,781	$ 1,000,000