FAIR VALUE MEASUREMENTS (Tables)	9 Months Ended
Sep. 30, 2021
FAIR VALUE MEASUREMENTS [Abstract]
Fair Value Measurement on Recurring Basis	Level 1 Fair Value September 30 December 31 September 30 in thousands2021 2020 2020 Fair Value Recurring Rabbi Trust Mutual funds$ 30,489 $ 28,058 $ 24,447 Total$ 30,489 $ 28,058 $ 24,447 Level 2 Fair Value September 30 December 31 September 30 in thousands2021 2020 2020 Fair Value Recurring Rabbi Trust Money market mutual fund$ 1,303 $ 837 $ 1,581 Total$ 1,303 $ 837 $ 1,581

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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