Income Taxes (Details 3)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Reasons for the difference between the U.S. federal income tax rate and the effective income tax rate for earnings
U.S. federal income tax rate (as a percent)	34.00%	34.00%
Increase (reduction) resulting from:
Final determinations and unrecognized tax benefit activity (1) (as a percent)	34.27%	67.16%
Non-deductible CDR expenses (as a percent)	0.61%	0.67%
Unrealized gain (loss) on foreign exchange (as a percent)	(3.46%)	2.42%
Change in valuation allowance (as a percent)	(31.45%)	(28.30%)
Income (loss) from pass through entities (as a percent)	0.34%	(2.22%)
Other, net (as a percent)	2.20%	0.31%
Effective income tax rate (as a percent)	36.51%	74.04%