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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
 12 Months Ended 15 Months Ended
Dec. 31, 2016
Mar. 31, 2017
Consolidated Balance Sheets    
Accumulated depreciation of property and equipment (in dollars) $ 12,495 $ 13,316
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized 250,000,000 250,000,000
Common stock, shares issued 142,691,986 142,829,530
Common stock, shares outstanding 142,691,986 142,829,530
Foreign currency translation adjustment, tax expense $ 1,293 $ 1,293