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DEBT OBLIGATIONS (Details) ¥ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2021 CNY (¥) | Dec. 31, 2020 USD ($)
DEBT OBLIGATIONS |  |  |  |
Long-term debt | $ 112,391,000 |  |  | $ 120,079,000
Unamortized debt issuance costs | (506,000) |  |  | (577,000)
Revolving Credit Facility |  |  |  |
DEBT OBLIGATIONS |  |  |  |
Long-term debt | $ 112,897,000 |  |  | 120,656,000
Effective rate (as a percent) | 2.40% |  | 2.40% |
Amended Revolving Facility |  |  |  |
DEBT OBLIGATIONS |  |  |  |
Maximum borrowing capacity | $ 225,000,000 |  |  |
Available borrowing capacity | $ 75,000,000 |  |  |
Commitment fees on unused portion of the Amended Revolving Facility ( as a percent) | 0.175% |  |  |
Unused amount of credit facility | $ 112,103 |  |  |
Amended Revolving Facility | Minimum |  |  |  |
DEBT OBLIGATIONS |  |  |  |
Commitment fees on unused portion of the Amended Revolving Facility ( as a percent) | 0.10% |  |  |
Amended Revolving Facility | Maximum |  |  |  |
DEBT OBLIGATIONS |  |  |  |
Commitment fees on unused portion of the Amended Revolving Facility ( as a percent) | 0.225% |  |  |
Amended Revolving Facility | LIBOR |  |  |  |
DEBT OBLIGATIONS |  |  |  |
Applicable margin (as a percent) | 1.50% |  |  |
Amended Revolving Facility | LIBOR | Minimum |  |  |  |
DEBT OBLIGATIONS |  |  |  |
Applicable margin (as a percent) | 1.00% |  |  |
Amended Revolving Facility | LIBOR | Maximum |  |  |  |
DEBT OBLIGATIONS |  |  |  |
Applicable margin (as a percent) | 1.75% |  |  |
Amended Revolving Facility | Prime Rate |  |  |  |
DEBT OBLIGATIONS |  |  |  |
Applicable margin (as a percent) | 0.50% |  |  |
Amended Revolving Facility | Prime Rate | Minimum |  |  |  |
DEBT OBLIGATIONS |  |  |  |
Applicable margin (as a percent) | 0.00% |  |  |
Amended Revolving Facility | Prime Rate | Maximum |  |  |  |
DEBT OBLIGATIONS |  |  |  |
Applicable margin (as a percent) | 0.75% |  |  |
China Credit Facility |  |  |  |
DEBT OBLIGATIONS |  |  |  |
Maximum borrowing capacity | $ 1,549,000 |  | ¥ 10,000 |
Average outstanding borrowings | 0 | $ 0 |  |
Principal amount of debt borrowed | $ 0 |  |  | $ 0

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