Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments (Details 1)

v3.19.1
Financial Instruments (Details 1) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Mar. 31, 2018
Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Derivative Asset $ 1,005 $ 1,623 $ 2,118 $ 734
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Derivative Financial Instruments, Assets [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Derivative Asset $ 1,005 $ 1,623