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Accumulated Other Comprehensive Loss (Tables)
6 Months Ended
Jun. 30, 2020
Equity [Abstract]  
Schedule of changes in accumulated other comprehensive loss
The following table summarizes the changes in the accumulated balances of other comprehensive loss during the three and six months ended June 30, 2020 and 2019 (in thousands):
 Three Months Ended June 30,Six Months Ended June 30,
 2020201920202019
Beginning balance$(3,787) $(3,376) $(3,239) $(3,985) 
Holding (losses) gains associated with marketable securities arising during period, net of tax823  344  275  953  
Ending balance$(2,964) $(3,032) $(2,964) $(3,032)