XML 117 R103.htm IDEA: XBRL DOCUMENT v3.8.0.1
Income Taxes - Reconciliation to Statutory Tax Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Taxes      
Income tax expense (benefit) at U.S. statutory rates $ (28,315) $ (41,806) $ (7,926)
State taxes, net of U.S. federal impact (2,523) (1,963) (1,607)
Effect of international operations 9,355 8,849 (7,659)
Research and development tax credit 620 (801) (1,628)
Net change in valuation allowance 1,342 50,520 23,655
Change in accrual for unrecognized tax benefits (4,772) (1,700) 4,876
Subsidiary liquidation   (12,435)  
Share-based compensation 99 2,133  
Effect of 2017 Tax Act (11,344)    
Worthless stock deduction     (2,069)
Change in entity tax status     904
Other (569) (31) 786
Total expense (benefit) for income taxes $ (36,107) $ 2,766 $ 9,332