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Balance Sheet Account Detail (Amortization) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Balance Sheet Related Disclosures [Abstract]      
Amortization expense $ 500 $ 900  
Remainder of 2020 2,444    
2021 3,276    
2022 3,320    
2023 3,379    
2024 3,499    
2025 3,726    
Thereafter 38,534    
Total $ 58,178   $ 58,695