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Intangible Assets (Notes)
 12 Months Ended
Sep. 30, 2018
Intangible Assets [Abstract]  
Intangible Assets Disclosure [Text Block]
Intangible Assets
During the year ended September 30, 2018, the Company recorded additional client base intangible assets of $1.4 million as part of the PayCommerce Financial Solutions, LLC acquisition. See Note 19- Acquisitions for additional discussion.
The gross and net carrying values of intangible assets as of the balance sheet dates, by major intangible asset class are as follows (in millions):
 
September 30, 2018
 
September 30, 2017
 
Gross Amount
 
Accumulated
Amortization
 
Net Amount
 
Gross Amount
 
Accumulated
Amortization
 
Net Amount
Intangible assets subject to amortization:
 
 
 
 
 
 
 
 
 
 
 
Trade name
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

Software programs/platforms
2.7

 
(2.6
)
 
0.1

 
2.7

 
(2.5
)
 
0.2

Client base
21.4

 
(10.1
)
 
11.3

 
20.0

 
(7.9
)
 
12.1

Total intangible assets
$
24.1

 
$
(12.7
)
 
$
11.4

 
$
22.7

 
$
(10.4
)
 
$
12.3


Amortization expense related to intangible assets was $2.3 million, $2.8 million, and $1.6 million for the fiscal years ended September 30, 2018, 2017, and 2016, respectively. The estimated future amortization expense as of September 30, 2018 is as follows (in millions):
Year ending September 30,
 
2019
$
2.5

2020
2.2

2021
2.2

2022
1.0

2023 and thereafter
3.5

 
$
11.4