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Fair value portion of an agreement for an unconditional promise by the maker to pay the holder a definite sum of money at a future date.

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FAIR VALUE (Assets and Liabilities Measured on a Nonrecurring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets:
Cash and Restricted cash	$ 620,135	$ 724,215	$ 964,300	$ 915,139
Liabilities:
Variable-rate debt	2,229,958	1,551,336
Allowance for doubtful accounts	15,600	10,700
Allowance for notes receivable	200	100
Level 1 \| Reported Value Measurement
Assets:
Cash and Restricted cash	620,135	724,215
Level 1 \| Estimate of Fair Value Measurement
Assets:
Cash and Restricted cash	620,135	724,215
Level 3 \| Reported Value Measurement
Assets:
Accounts receivable, net	12,279	12,589
Notes receivable, net	36,379	4,694
Level 3 \| Estimate of Fair Value Measurement
Assets:
Accounts receivable, net	12,279	12,589
Notes receivable, net	36,379	4,694
Level 2 \| Reported Value Measurement
Liabilities:
Fixed-rate debt	1,908,660	1,663,875
Variable-rate debt	2,229,958	1,551,336
Level 2 \| Estimate of Fair Value Measurement
Liabilities:
Fixed-rate debt	1,949,773	1,608,635
Variable-rate debt	$ 2,229,958	$ 1,551,336