LONG-TERM DEBT - Equipment Term Loans and Mortgages (Details)	3 Months Ended
Mar. 31, 2020 USD ($) Lender	Dec. 31, 2019 USD ($)
LONG-TERM DEBT
Loan balance	$ 693,600,000	$ 704,100,000
Equipment term loans
LONG-TERM DEBT
Equipment with collateralizes term loans	177,200,000
Loan balance	$ 180,300,000	$ 188,400,000
Number of lenders \| Lender	33
Equipment term loans \| Minimum
LONG-TERM DEBT
Interest rate (as a percent)	1.50%
Equipment term loans \| Maximum
LONG-TERM DEBT
Interest rate (as a percent)	10.70%
Bank mortgage loan
LONG-TERM DEBT
Interest rate (as a percent)	3.70%
Loan amount	$ 3,100,000
Monthly installments	$ 15,776
November 1 2020 \| Equipment term loans
LONG-TERM DEBT
Number of days of adjustment of interest rate and monthly payments	45 days
November 1 2020 \| Equipment term loans \| Base Rate
LONG-TERM DEBT
Interest rate (as a percent)	2.50%
November 1 2020 \| Equipment term loans \| Minimum
LONG-TERM DEBT
Interest rate (as a percent)	3.70%

Represents equipment which collateralized term loans in an aggregate amount.

No definition available.

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- Definition

Number of days prior to which the interest rate and monthly payments plus three year advance rate published by Federal Home Loan Bank will be adjusted.

+ References

No definition available.

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- Definition

Number of lenders with whom the entity has term loans.

+ References

No definition available.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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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 the required periodic payments including both interest and principal payments.

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