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UNAUDITED CONSOLIDATED STATEMENTS OF (LOSS) INCOME (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Income Statement [Abstract]        
Interest income $ 188 $ 211 $ 339 $ 416