The increase in ratio of total debt obligation relative to the total assets or the equity contribution.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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DEBT OBLIGATIONS (Details) ¥ in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
DEBT OBLIGATIONS (Details) ¥ in Thousands, $ in Thousands	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2023 CNY (¥)	Dec. 31, 2022 USD ($)
DEBT OBLIGATIONS
Unamortized debt issuance costs	$ (475)		$ (475)		$ (625)
Finance lease obligations - noncurrent	8,815		8,815		9,019
Long-term debt	227,106		227,106		235,454
Revolving Credit Facility
DEBT OBLIGATIONS
Revolving Credit Facility, long-term	$ 218,766		$ 218,766		$ 227,060
Effective rate (as a percent)	5.06%		5.06%	5.06%
Amended Revolving Facility
DEBT OBLIGATIONS
Maximum borrowing capacity	$ 280,000		$ 280,000
Minimum interest coverage ratio			3.00%
Leverage ratio			4.00%
Increase in leverage ratio			0.50%
Unused amount of credit facility	61,234		$ 61,234
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)			0.275%
Amended Revolving Facility \| For quarter ending on or after December 31, 2023
DEBT OBLIGATIONS
Leverage ratio			3.50%
Amended Revolving Facility \| Base Rate
DEBT OBLIGATIONS
Applicable margin (as a percent)			0.00%
Amended Revolving Facility \| Adjusted SOFR
DEBT OBLIGATIONS
Applicable margin (as a percent)			1.75%
Amended Revolving Facility \| Adjusted SOFR \| Minimum
DEBT OBLIGATIONS
Applicable margin (as a percent)			1.00%
Amended Revolving Facility \| Adjusted SOFR \| Maximum
DEBT OBLIGATIONS
Applicable margin (as a percent)			2.25%
China Credit Facility
DEBT OBLIGATIONS
Maximum borrowing capacity	1,444		$ 1,444	¥ 10,000
Average outstanding borrowings	$ 0	$ 0