FINANCE RECEIVABLES - Finance Receivable Credit Quality Indicators (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Total finance receivables, gross	$ 240.4	$ 242.8
Superior
Financing Receivable, Recorded Investment [Line Items]
Total finance receivables, gross	9.1	9.6
Above Average
Financing Receivable, Recorded Investment [Line Items]
Total finance receivables, gross	62.5	64.7
Average
Financing Receivable, Recorded Investment [Line Items]
Total finance receivables, gross	102.3	111.3
Below Average
Financing Receivable, Recorded Investment [Line Items]
Total finance receivables, gross	61.5	53.0
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total finance receivables, gross	$ 5.0	$ 4.2