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Fair Value of Financial Instruments - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Fair Value Disclosures [Abstract]        
Asset impairments $ 233 $ 6,079 $ 233 $ 6,079