Acquisitions (Go Cash) (Details) $ in Thousands					12 Months Ended
	Sep. 30, 2014 USD ($)	Dec. 19, 2013 USD ($)	Nov. 12, 2013 USD ($)	Dec. 20, 2012 USD ($) shares	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)	Dec. 31, 2013 USD ($)
Business Acquisition [Line Items]
Reduction in contingent consideration liability					$ 4,792	$ 0	$ 0
Go Cash, LLC [Member]
Business Acquisition [Line Items]
Liabilities assumed				$ 200		202
Contingent consideration arrangements, range of outcomes, period				4 years
Total consideration to be transferred				$ 55,600
Deferred consideration, future payment, multiplier				6.0
Expected minimum payments				$ 50,800
Payment for business acquisition		$ 5,000	$ 6,000	$ 27,800		$ 0
Deferred consideration	$ 12,000				12,000
Equity interest issued, shares | shares				1,400,198
Contingent consideration liability								$ 4,800
Reduction in contingent consideration liability	$ 4,800				$ 4,800