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Revenue - Narrative (Details) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]      
Performance obligation unsatisfied or partially satisfied $ 133,000,000.0    
Impairment charges 0 $ 0  
Contract cost, accumulated amortization $ 5,900,000   $ 4,300,000