RELATED PARTY TRANSACTIONS (Details) - USD ($)
|
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Related Party Transaction [Line Items] |
|
|
|
| Outstanding aggregate principal amount |
$ 164,300,000
|
$ 4,300,000
|
$ 855,225,000
|
| Chief executive officer's term of employment |
3 years
|
|
|
| Chief Executive Officer [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Retention payment |
|
2,000,000
|
|
| Repurchase of common stock |
|
|
125,660
|
| Issue of stock options |
|
|
150,000
|
| Repurchase of common stock |
|
|
$ 12,600,000
|
| Chief Financial Officer [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Retention payment |
|
700,000
|
|
| All retention payments [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Retention payment |
|
2,700,000
|
|
| tax receivable agreement payment [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Related Party Transaction, Due from (to) Related Party |
$ 5,000,000
|
48,000
|
|
| 2015 agreement [Member] | Chief Executive Officer [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Retention payment |
|
3,000,000
|
|
| 2015 agreement [Member] | Chief Financial Officer [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Retention payment |
|
1,300,000
|
|
| 2015 agreement [Member] | All retention payments [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Retention payment |
4,300,000
|
|
|
| IPO [Member] | Chief Executive Officer [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Issue of stock options |
|
|
971,420
|
| Accrued Liabilities [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Retention Payable |
$ 2,800,000
|
$ 1,400,000
|
|