Annual report pursuant to Section 13 and 15(d)

Income Taxes - Valuation Allowance for Deferred Tax Assets (Details)

v3.7.0.1
Income Taxes - Valuation Allowance for Deferred Tax Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Movement in Valuation Allowances and Reserves [Roll Forward]      
Beginning of year balance $ 250,164 $ 136,547 $ 76,916
Changes in valuation allowance charged to income 114,980 114,106 52,529
Foreign currency translation (109) (773) 0
Acquisition 0 284 7,102
End of year balance $ 365,035 $ 250,164 $ 136,547