Annual report pursuant to Section 13 and 15(d)

Financial Instruments and Risk Management (Narrative) (Details)

v3.19.3.a.u2
Financial Instruments and Risk Management (Narrative) (Details)
12 Months Ended
Dec. 31, 2019
USD ($)
Derivatives [Line Items]  
Deferred net gains on derivatives accumulated in other comprehensive income expected to be reclassified to net income in next twelve months $ 9,900,000
Maximum  
Derivatives [Line Items]  
Remaining maturity of derivative contracts 4 years
Aggregate unrealized gain of derivative contracts with single counterparty $ 5,100,000