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Equity - AOCI (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Accumulated Other Comprehensive Loss    
Cumulative foreign currency translation adjustment $ (1,766) $ (1,683)
Unrealized gains (losses) on derivatives, net (272) (467)
Supplemental Executive Retirement plan minimum liability and other (2,421) (2,558)
Total accumulated other comprehensive income (loss) $ (4,459) $ (4,708)