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Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Statement of Comprehensive Income [Abstract]        
Net income (loss) $ 3,682 $ (1,125) $ 7,139 $ (6,992)
Other comprehensive income (loss):        
Changes in unrealized gains (losses) on investment securities 26 (96) 28 277
Comprehensive income (loss) $ 3,708 $ (1,221) $ 7,167 $ (6,715)