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

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Amount before unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer.

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

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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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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No definition available.

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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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Present value of lessee's discounted obligation for lease payments from finance lease, classified as noncurrent.

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Average amount borrowed under the credit facility during the period.

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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No definition available.

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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 of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in remainder of current fiscal year.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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DEBT OBLIGATIONS (Details) ¥ in Thousands, $ in Thousands	3 Months Ended
DEBT OBLIGATIONS (Details) ¥ in Thousands, $ in Thousands	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2022 CNY (¥)	Dec. 31, 2021 USD ($)
DEBT OBLIGATIONS
Unamortized debt issuance costs	$ (400)			$ (435)
Finance lease obligations - noncurrent	9,303
Long-term debt	178,619			158,960
Maturities of long-term debt
Remainder of 2022	551
Revolving Credit Facility
DEBT OBLIGATIONS
Revolving Credit Facility, long-term	$ 169,716			$ 159,395
Effective rate (as a percent)	2.26%		2.26%
Amended Revolving Facility
DEBT OBLIGATIONS
Maximum borrowing capacity	$ 225,000
Available borrowing capacity	$ 75,000
Commitment fees on unused portion of the Amended Revolving Facility ( as a percent)	0.20%
Leverage ratio	4.00%
Unused amount of credit facility	$ 55,284
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)	1.625%
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)	0.625%
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	$ 1,577		¥ 10,000
Average outstanding borrowings	$ 0	$ 0