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Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Statement of Comprehensive Income [Abstract]        
Reclassification adjustments to net income (loss) resulting from realized gains or losses on sale of securities $ 0 $ 0 $ 0 $ 0
Other comprehensive income, tax $ 0 $ 0 $ 0 $ 0