v3.20.4

UNIT-BASED COMPENSATION Table 1 - Information for LTIP Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unit-based awards, outstanding (units)	2,441,003	1,456,296	1,277,480
Compensation expense	$ 12,185	$ 38,035	$ 30,699
Restricted units, domestic employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unit-based awards, outstanding (units)	2,235,125	1,223,143	1,028,484	736,746
Compensation expense	$ 10,205	$ 9,437	$ 8,233
Restricted units, non-employee directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unit-based awards, outstanding (units)	98,769	61,349	59,752	27,097
Compensation expense	$ 631	$ 774	$ 524
Restricted units, international employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unit-based awards, outstanding (units)	19,987	10,243	30,918
Compensation expense	$ 58	$ 711	$ 1,158
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unit-based awards, outstanding (units)	57,448	74,439	80,690	38,865
Compensation expense	$ 1,291	$ 4,172	$ 1,889
Performance units awarded and outstanding	87,122	161,561	158,326	80,961
Unit Awards[Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 0	$ 22,941	$ 18,895
Performance units awarded and outstanding	0	0	0

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+ References

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-Publisher FASB
-Name Accounting Standards Codification
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