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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Income Statement [Abstract]        
Net change in unrealized gain (loss) on available-for-sale securities (net of tax effect of ($16) and $46 for the three months ended September 30, 2019 and 2018, and ($51) and $60 for the nine months ended September 30, 2019 and 2018) $ (16) $ 46 $ (51) $ 60