NEW ACCOUNTING STANDARDS (NARRATIVE) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Revenue, Remaining Performance Obligation, Optional Exemption, Performance Obligation [true false]	true
Revenue, Practical Expedient, Financing Component [true false]	true
Retained earnings	$ 757,312	$ 773,218
ASU 2016-02
Retained earnings			$ 800

The cumulative amount of the reporting entity's undistributed earnings or deficit.

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- Definition

Indicates (true false) whether practical expedient was elected not to adjust consideration for effect of financing component when transfer and customer payment for product or service occurs within one year or less.

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Indicates (true false) whether optional exemption was applied not to disclose amount of transaction price allocated to and explanation of expected timing of revenue recognition for remaining performance obligation, when contract has expected duration of one year or less or right to consideration corresponds directly to performance completed.

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