Income and other Taxes Income and other Taxes - Income Tax Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended									12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2011	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Federal Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current										$ 0	$ 120	$ 0
Deferred										(21,590)	0	0
Federal income tax expense (benefit)										(21,590)	120	0
State and Local Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current										0	0	0
Deferred										(2,490)	0	0
State and local income tax expense (benefit)										(2,490)	0	0
Foreign Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current										0	0	1,644
Deferred										0	0	0
Foreign income tax expense (benefit)										0	0	1,644
Total income tax (benefit) expense	$ (24,080)	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 120	$ 1,600	$ (24,080)	$ 120	$ 1,644