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Merger Narrative (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 19, 2018
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2019
Business Acquisition [Line Items]          
Merger transaction expense     $ 2,414,000 $ 4,763,000  
Fifth Creek          
Business Acquisition [Line Items]          
Business combination, pro forma information, revenue of acquiree since acquisition date, actual $ 2,100,000        
Business combination, pro forma information, expenses of acquiree since acquisition date, actual $ 1,800,000        
Business acquisition, equity interest issued or issuable, number of shares       100,000,000  
Fair value of common stock issued   $ 484,000,000      
Plus: Repayment of Fifth Creek debt   $ 53,900,000      
Merger transaction expense         $ 19,200,000
Fifth Creek | Acquisition-related Costs          
Business Acquisition [Line Items]          
Merger transaction expense     $ 0 $ 4,000,000