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Recent Accounting Pronouncements Adopted ASUs (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Jan. 01, 2018 | Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Unbilled Contracts Receivable | $ 750,875 |  | $ 750,875 |  |  |
Increase (Decrease) in Unbilled Receivables |  |  | (67,905) | $ 0 |  |
Royalties | 30,049 | $ 69,990 | 51,423 | 138,946 |  |
Sales Revenue, Goods, Net | 8,087 | 8,401 | 15,400 | 19,305 |  |
Contract and other revenue | 18,322 | 16,329 | 36,061 | 33,820 |  |
Revenue, Net | 56,458 | 94,720 | 102,884 | 192,071 |  |
Other Nonoperating Income | (8,249) | (129) | (17,365) | (283) |  |
Income Tax Expense (Benefit) | (1,015) | 2,507 | (4,244) | 9,883 |  |
Net Income (Loss) Attributable to Parent | (15,357) | $ 2,605 | (51,046) | 5,611 |  |
Deferred tax assets | 82,111 |  | 82,111 |  |  | $ 159,099
Contract with Customer, Liability | 13,900 |  | 13,900 |  | $ 20,737 |
Accrued Income Taxes, Current | 103,598 |  | 103,598 |  | 105,000 |
Increase (Decrease) in Income Taxes Payable |  |  | (5,204) | $ (4,621) |  |
Deferred Tax Assets, Gross | 142,700 |  | 142,700 |  | 105,000 |
Deferred Tax Assets, Valuation Allowance | 66,900 |  | 66,900 |  | 16,000 |
Deferred Tax Liabilities, Net |  |  |  |  | 174,000 |
Accumulated deficit | (97,383) |  | (97,383) |  | 626,000 | $ (636,227)
Retained Earnings [Member] |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  |  |  | 1,100 |
Calculated under Revenue Guidance in Effect before Topic 606 [Member] |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Unbilled Contracts Receivable | 0 |  | 0 |  |  |
Royalties | 73,626 |  | 150,800 |  |  |
Sales Revenue, Goods, Net | 8,221 |  | 15,777 |  |  |
Contract and other revenue | 16,973 |  | 32,702 |  |  |
Revenue, Net | 98,820 |  | 199,279 |  |  |
Other Nonoperating Income | (1,208) |  | (2,810) |  |  |
Income Tax Expense (Benefit) | 4,791 |  | 6,265 |  |  |
Net Income (Loss) Attributable to Parent | 14,158 |  | 20,285 |  |  |
Deferred tax assets | 177,591 |  | 177,591 |  |  |
Contract with Customer, Liability | 12,693 |  | 12,693 |  |  |
Accrued Income Taxes, Current | 5,865 |  | 5,865 |  |  |
Accumulated deficit | 652,340 |  | 652,340 |  |  |
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Unbilled Contracts Receivable |  |  |  |  | $ 818,000 |
Increase (Decrease) in Deferred Income Taxes | 95,480 |  |  |  |  |
Increase (Decrease) in Unbilled Receivables | (750,875) |  |  |  |  |
Royalties | 43,577 |  | 99,377 |  |  |
Sales Revenue, Goods, Net | 134 |  | 377 |  |  |
Change in contract revenue from adoption of ASC 606 | (1,349) |  | (3,359) |  |  |
Revenue, Net | 42,362 |  | 96,395 |  |  |
Other Nonoperating Income | (7,041) |  | (14,555) |  |  |
Income Tax Expense (Benefit) | 5,806 |  | 10,509 |  |  |
Net Income (Loss) Attributable to Parent | 29,515 |  | 71,331 |  |  |
Increase (Decrease) in Deferred Revenue and Customer Advances and Deposits | (1,207) |  |  |  |  |
Increase (Decrease) in Income Taxes Payable | (97,733) |  |  |  |  |
Accumulated deficit | $ 554,957 |  | $ 554,957 |  |  |

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