FINANCE RECEIVABLES - Finance Receivable Credit Quality Indicators (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Total finance receivables, gross	$ 333.5	$ 353.3
Superior
Financing Receivable, Recorded Investment [Line Items]
Total finance receivables, gross	17.5	21.5
Above Average
Financing Receivable, Recorded Investment [Line Items]
Total finance receivables, gross	152.7	159.4
Average
Financing Receivable, Recorded Investment [Line Items]
Total finance receivables, gross	118.3	117.9
Below Average
Financing Receivable, Recorded Investment [Line Items]
Total finance receivables, gross	40.6	44.2
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total finance receivables, gross	$ 4.4	$ 10.3