INCOME TAXES AND RELATED PAYMENTS (Details)	6 Months Ended
	Jun. 30, 2017 USD ($) company	Dec. 31, 2037 USD ($)	Dec. 31, 2036 USD ($)	Dec. 31, 2035 USD ($)	Dec. 31, 2034 USD ($)	Dec. 31, 2029 USD ($)
Income Tax Disclosure [Abstract]
Number of wholly-owned subsidiaries | company	2
Decreases resulting from settlements with taxing authorities	$ 5,900,000
Percentage of cash savings	85.00%
Tax Receivable Agreement
Payments to unitholders under Tax Receivable Agreement	$ 0
Forecast
Tax Receivable Agreement
Payments to unitholders under Tax Receivable Agreement		$ 62,700,000	$ 74,500,000	$ 99,000,000	$ 71,300,000	$ 33,400,000