ORGANIZATION AND HISTORY (Details) $ / shares in Units, $ in Thousands			12 Months Ended
	Mar. 22, 2017 USD ($) $ / shares shares	Dec. 22, 2016 shares	Dec. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($)	Sep. 30, 2013 $ / shares
Class of Stock [Line Items]
Stock split ratio		0.0059
Stock, shares authorized (in shares)		230,000,000
Common stock, authorized (in shares)		200,000,000	200,000,000	200,000,000
Preferred stock, authorized (in shares)		30,000,000	30,000,000	30,000,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.001	$ 0.001		$ 0.001
Proceeds from IPO | $			$ 185,500	$ 0	$ 0
Repayment of outstanding borrowings | $	$ 71,800		166,546	41,295	73,782
Funds to purchase additional hydraulic fracturing fleets and other equipment | $	$ 86,800		$ 285,891	$ 42,832	$ 62,855
IPO
Class of Stock [Line Items]
Shares of common stock sold, including shares sold by third parties (in shares)	25,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.001
Stock price (in dollars per share) | $ / shares	$ 14.00
Proceeds from IPO | $	$ 170,100
Payment of underwriting discounts and commissions | $	10,900
Payments of stock issuance costs, other | $	$ 4,500
IPO | Series A Preferred Stock
Class of Stock [Line Items]
Number of shares of outstanding stock converted (in shares)	16,999,990
IPO | March 2017 Stock Split
Class of Stock [Line Items]
Stock split ratio	1.45
IPO | Series A Preferred Stock Converted To Common Stock | Series A Preferred Stock
Class of Stock [Line Items]
Stock split ratio	1
IPO sold by Company
Class of Stock [Line Items]
Shares of common stock sold, including shares sold by third parties (in shares)	13,250,000
IPO sold by existing stockholders
Class of Stock [Line Items]
Shares of common stock sold, including shares sold by third parties (in shares)	11,750,000