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Income Taxes - Deferred Tax Assets And Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Deferred tax assets    
Settlement and Royalty Indemnification $ 4,264 $ 7,807
Deferred revenues and loss contract provisions 268 2,899
Employee related liabilities 3,796 4,598
Intangible assets 1,518 1,733
Equity method investments 12,326 7,500
Net operating loss carryforward 13,341 23,193
Tax credits 99,903 97,484
Deposits on contracts 0 1,146
Other 2,109 2,118
Total deferred tax assets 137,525 148,478
Less: Deferred tax liabilities (75,910) (148,269)
Property and equipment and other 61,615 209
Less: Deferred tax liabilities    
Property and equipment and other (219) (209)
Total deferred tax liabilities (219) (209)
Net deferred tax assets $ 61,396 $ 0