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INCOME TAXES - Summary of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Unrecognized tax benefits
Beginning balance-gross unrecognized tax benefits (UTB’s)	$ 17,496	$ 18,728	$ 20,137
Lapse of statute of limitations	(291)	(1,232)	(1,409)
Rate change impact	(1,698)
Ending balance—gross unrecognized tax benefits (“UTB”s)	15,507	17,496	18,728
UTB’s as a credit in deferred taxes	(12,905)	(14,604)	(14,604)
Federal benefit of state taxes	(2,062)	(2,063)	(2,063)
Unrecognized tax benefits that would impact the annual effective tax rate if recognized	$ 540	$ 829	$ 2,061

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Amount of unrecognized tax benefits.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
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Amount of decrease in unrecognized tax benefits resulting from foreign currency translation.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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Represents the portion of unrecognized tax benefits, which is related to the federal tax benefit of state income tax items.

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