CREDIT FACILITIES - 364-Day Revolving Credit Facility (Details)			1 Months Ended	6 Months Ended
	Jun. 29, 2020 USD ($)	Jun. 06, 2018 USD ($)	Dec. 31, 2019 USD ($)	Aug. 02, 2020 USD ($)	Feb. 02, 2020 USD ($)	Dec. 31, 2019 CNY (¥)
Line of Credit
Line of Credit Facility [Line Items]
Long-term line of credit				$ 0	$ 0
Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt instrument, term			12 months
Maximum borrowing capacity			$ 18,600,000			¥ 130,000,000.0
Revolving Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Debt instrument, term	364 days			5 years
Maximum borrowing capacity	$ 300,000,000.0	$ 400,000,000.0		$ 600,000,000.0
Leverage ratio, maximum	3.50
Interest charge ratio, minimum	2.00
Long-term line of credit				$ 0
Revolving Credit Facility | Line of Credit | Minimum
Line of Credit Facility [Line Items]
Unused capacity commitment fee	0.25%
Revolving Credit Facility | Line of Credit | Maximum
Line of Credit Facility [Line Items]
Unused capacity commitment fee	0.55%
Revolving Credit Facility | Line of Credit | LIBOR | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.50%	1.00%		1.00%
Revolving Credit Facility | Line of Credit | LIBOR | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.25%	1.75%		1.50%
Revolving Credit Facility | Line of Credit | Prime Rate | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.50%
Revolving Credit Facility | Line of Credit | Prime Rate | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.25%