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SUBSEQUENT EVENTS (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 4 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 18, 2018 | Feb. 28, 2018 | Mar. 31, 2018 | Mar. 31, 2017 | Apr. 17, 2018 | Dec. 31, 2017 | Jun. 16, 2016
Subsequent Events [Abstract] |  |  |  |  |  |  |  |
Proceeds from debt |  |  | $ 75,943 |  | $ 25,000 |  |  |
Class A Common Stock [Member] |  |  |  |  |  |  |  |
Subsequent Events [Abstract] |  |  |  |  |  |  |  |
Shares issued (in shares) |  | 1,535,652 |  |  |  |  |  |
4.75% Convertible Notes due 2020 [Member] |  |  |  |  |  |  |  |
Subsequent Events [Abstract] |  |  |  |  |  |  |  |
Original principal amount |  |  | $ 210,000 |  |  |  |  | $ 210,000
Interest rate |  |  | 4.75% |  |  |  |  |
Outstanding balance |  |  | $ 210,000 | [1],[2] |  |  | $ 210,000 |
Subsequent Event [Member] | Credit Agreement [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Subsequent Events [Abstract] |  |  |  |  |  |  |  |
Consolidated leverage ratio | 2.25 |  |  |  |  |  |  |
Subsequent Event [Member] | Credit Agreement [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Subsequent Events [Abstract] |  |  |  |  |  |  |  |
Consolidated interest coverage ratio | 3.00 |  |  |  |  |  |  |
Subsequent Event [Member] | Term Loan Facility [Member] |  |  |  |  |  |  |  |
Subsequent Events [Abstract] |  |  |  |  |  |  |  |
Original principal amount | $ 400,000 |  |  |  |  |  |  |
Term of loan | 5 years |  |  |  |  |  |  |
Frequency of payment | Quarterly |  |  |  |  |  |  |
Subsequent Event [Member] | Term Loan Facility [Member] | First Year [Member] |  |  |  |  |  |  |  |
Subsequent Events [Abstract] |  |  |  |  |  |  |  |
Annual amortization percentage | 5.00% |  |  |  |  |  |  |
Subsequent Event [Member] | Term Loan Facility [Member] | Second Year [Member] |  |  |  |  |  |  |  |
Subsequent Events [Abstract] |  |  |  |  |  |  |  |
Annual amortization percentage | 5.00% |  |  |  |  |  |  |
Subsequent Event [Member] | Term Loan Facility [Member] | Third Year [Member] |  |  |  |  |  |  |  |
Subsequent Events [Abstract] |  |  |  |  |  |  |  |
Annual amortization percentage | 7.50% |  |  |  |  |  |  |
Subsequent Event [Member] | Term Loan Facility [Member] | Fourth Year [Member] |  |  |  |  |  |  |  |
Subsequent Events [Abstract] |  |  |  |  |  |  |  |
Annual amortization percentage | 7.50% |  |  |  |  |  |  |
Subsequent Event [Member] | Term Loan Facility [Member] | Fifth Year [Member] |  |  |  |  |  |  |  |
Subsequent Events [Abstract] |  |  |  |  |  |  |  |
Annual amortization percentage | 10.00% |  |  |  |  |  |  |
Subsequent Event [Member] | Term Loan Facility [Member] | LIBOR [Member] |  |  |  |  |  |  |  |
Subsequent Events [Abstract] |  |  |  |  |  |  |  |
Basis spread on variable rate | 2.25% |  |  |  |  |  |  |
Subsequent Event [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |
Subsequent Events [Abstract] |  |  |  |  |  |  |  |
Borrowing capacity | $ 350,000 |  |  |  |  |  |  |
Term of loan | 5 years |  |  |  |  |  |  |
Proceeds from debt | $ 78,500 |  |  |  |  |  |  |
Subsequent Event [Member] | Revolving Credit Facility [Member] | LIBOR [Member] |  |  |  |  |  |  |  |
Subsequent Events [Abstract] |  |  |  |  |  |  |  |
Basis spread on variable rate | 2.25% |  |  |  |  |  |  |
Subsequent Event [Member] | 4.75% Convertible Notes due 2020 [Member] |  |  |  |  |  |  |  |
Subsequent Events [Abstract] |  |  |  |  |  |  |  |
Interest rate | 4.75% |  |  |  |  |  |  |
Payment for principal and accrued interest | $ 213,400 |  |  |  |  |  |  |
Accrued interest |  |  |  |  |  | $ 3,400 |  |
Extension fee | $ 105 |  |  |  |  |  |  |
Extension fee percentage | 0.05% |  |  |  |  |  |  |
[1] | As of March 31, 2018, the current portion of the Company's debt (i.e. becoming due in the next 12 months) included $17.5 million of the balance of its U.S. dollar denominated debt under the Credit Agreement facility, $8.5 million of the balance of its Japanese yen-denominated debt under the Credit Agreement facility, $4.1 million of the Japan subsidiary loan and the $210.0 million convertible note. The Company classified the $122.5 million borrowed under the revolving line of credit as short term because it was the Company's intention to use the line of credit to borrow and pay back funds over short periods of time.
[2] | The carrying value of the debt reflects the amounts stated in the above table less debt issuance costs of $1.7 million related to the Credit Agreement, which is not reflected in this table.

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