Annual report pursuant to Section 13 and 15(d)

Income Taxes - Change in Valuation Allowance (Details)

v3.8.0.1
Income Taxes - Change in Valuation Allowance (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Deferred Tax Assets, Valuation Allowance [Roll Forward]      
Valuation allowance, beginning balance $ 53,199 $ 73,659 $ 50,782
Increase in valuation allowance (9,930) (19,060) 22,877
Acquired valuation allowance from business combination   (1,400)  
Valuation allowance, ending balance $ 43,269 $ 53,199 $ 73,659