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Debt and Credit Facility - Convertible Debt (Details)
3 Months Ended
Jun. 30, 2019
$ / shares
2017 Senior Convertible Debt  
Debt Instrument [Line Items]  
Conversion Rate 10.3379
Approximate Conversion Price (in dollars per share) $ 96.73
Incremental Share Factor 5.1689
Maximum Conversion Rate 14.7315
2015 Senior Convertible Debt  
Debt Instrument [Line Items]  
Conversion Rate 16.1212
Approximate Conversion Price (in dollars per share) $ 62.03
Incremental Share Factor 8.0606
Maximum Conversion Rate 22.5696
2017 Junior Convertible Debt  
Debt Instrument [Line Items]  
Conversion Rate 10.5225
Approximate Conversion Price (in dollars per share) $ 95.03
Incremental Share Factor 5.2613
Maximum Conversion Rate 14.7315