Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments - Additional Information (Details Textuals)

v3.19.2
Financial Instruments - Additional Information (Details Textuals) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Fair Value Disclosures [Abstract]        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) $ (800,000) $ 300,000 $ (1,405,000) $ 1,728,000
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount $ 0 $ 0 $ 0 $ 0