Acquisitions PayCommerce Financial Solutions Acquisition (Details) $ in Millions	12 Months Ended
	Sep. 30, 2018 USD ($)
Business Acquisition [Line Items]
Goodwill, Acquired During Period	$ 2.6
PayCommerce [Member] [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	3.8
Business Combination, Acquired Receivable, Fair Value	0.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	0.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Assets	0.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	2.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 1.3
Finite-Lived Intangible Asset, Useful Life	5 years
Goodwill, Acquired During Period	$ 2.6