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Revenues - Contract Balances (Details) - USD ($)
3 Months Ended
Sep. 30, 2018
Jul. 01, 2018
Jun. 30, 2018
Revenue from Contract with Customer [Abstract]      
Short-term contract assets $ 8,767,000 $ 5,474,000 $ 0
Long-term contract assets 12,041,000 12,382,000 0
Short-term deferred revenue 582,139,000 618,197,000 644,211,000
Long-term deferred revenue 43,585,000 $ 64,743,000 $ 69,197,000
Contract assets reclassified to receivables 2,400,000    
Asset impairment 0    
Revenue recognized $ 270,000,000