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Derivative Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2019
Derivative Financial Instruments  
Schedule of gains and (losses) and weighted average notional amount of derivatives

Year ended December 31,

2018

2017

Gains (losses)

Weighted average notional amount

Gains (losses)

Weighted average notional amount

(in thousands)

Foreign currency exchange forwards

$

327

$

2,869

$

(6)

$

314