SUBSEQUENT EVENT (Details) - USD ($)	Oct. 31, 2018	Nov. 21, 2017	Oct. 22, 2015
QuoteWizard | Subsequent Event
Subsequent Event [Line Items]
Initial cash consideration to acquire business	$ 300,000,000
Contingent consideration	70,200,000
Cash used to fund acquisition	175,000,000
Revolving Credit Facility
Subsequent Event [Line Items]
Current borrowing capacity		$ 250,000,000.0	$ 125,000,000.0
Revolving Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Increase in borrowing capacity	100,000,000.0
Current borrowing capacity	350,000,000.0
Revolving Credit Facility | QuoteWizard | Subsequent Event
Subsequent Event [Line Items]
Proceeds from revolving credit facility used for acquisition	$ 125,000,000