Quarterly report pursuant to Section 13 or 15(d)

Other Income (Expense), Net (Detail Textuals)

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Other Income (Expense), Net (Detail Textuals) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Other Income and Expenses [Abstract]        
Other income (expense), net $ 12,922 $ (5,609) $ 11,256 $ (8,424)