Annual report pursuant to Section 13 and 15(d)

Consolidated Statement of Comprehensive Income (Loss) (Parenthetical)

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Consolidated Statement of Comprehensive Income (Loss) (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Statement of Comprehensive Income [Abstract]      
Unrealized (loss) gain from interest rate hedge, tax effect $ (35) $ (52) $ 390