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Financial Instruments - Summary of Outstanding Interest Rate Swap Agreement (Details) - Interest rate swap - Cash Flow Hedge
$ in Millions
3 Months Ended
Mar. 31, 2019
USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]  
Derivative contract term 3 years
Aggregate Notional Amount $ 350.0
LIBOR  
Derivative Instruments and Hedging Activities Disclosures [Line Items]  
Spread on receive rate 2.00%
Receive Rate as of March 31, 2019 4.50%
Pay Rate 3.70%