Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Schedule of Open Derivative Financial Instruments (Details)

v3.19.1
Fair Value Measurements - Schedule of Open Derivative Financial Instruments (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Open Contracts    
Assets:    
Derivatives instruments $ 20,275 $ 74,580