ACCOUNTS RECEIVABLE SECURITIZATION (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Short-term Debt [Line Items]
Costs associated with receivables facility	$ 643,000	$ 18,514,000
Line of Credit | Accounts Receivable Securitization Facility
Short-term Debt [Line Items]
Maximum borrowing capacity	$ 100,000,000
Unused commitment fee	0.60%
Accounts receivable eligible for securitization	$ 30,258,000		$ 41,282,000
Outstanding borrowings	0		0
Letters of credit outstanding	30,919,000		41,211,000
Remaining borrowing capacity	0		$ 71,000
Cash collateral	661,000
Costs associated with receivables facility	$ 341,000	$ 382,000
Minimum | Line of Credit | Accounts Receivable Securitization Facility
Short-term Debt [Line Items]
Security facility program fee	2.00%
Maximum | Line of Credit | Accounts Receivable Securitization Facility
Short-term Debt [Line Items]
Security facility program fee	2.50%
Restricted Cash | Line of Credit | Accounts Receivable Securitization Facility
Short-term Debt [Line Items]
Cash collateral	$ 661,000