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Investments (Tables)
 9 Months Ended
Sep. 30, 2020
Investments, All Other Investments [Abstract]  
Investments
The following table presents the carrying value of our investments (in thousands) as of:
September 30, 2020December 31, 2019
Investment in privately held oil and gas company$1,500 $8,359 
Cash surrender value of life insurance contracts13,467 13,056 
Other investments692 514 
Total investments$15,659 $21,929