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INVESTMENTS IN UNCONSOLIDATED AFFILIATES (Tables)
6 Months Ended
Jun. 30, 2021
Equity Method Investments and Joint Ventures [Abstract]  
Carrying values of investments in unconsolidated entities
The carrying values of investments in unconsolidated affiliates, categorized by type of investment, is as follows (in thousands):
June 30, 2021December 31, 2020
Equity method investment$3,157 $3,686 
Non-marketable equity security investment3,018 3,018 
Investments in unconsolidated affiliates$6,175 $6,704