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Revenue from Contracts with Customers (Tables) | 6 Months Ended
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Jun. 30, 2018
Revenue Recognition from Contracts with Customers [Abstract] |
Contract with Customer, Asset and Liability [Table Text Block] | The Company’s contract balances were as follows:
| As of
(In thousands) | June 30, 2018 |  | January 1, 2018
Unbilled receivables | $ | 750,875 |  |  | $ | 818,371 |
Deferred revenue | 13,900 |  |  | 20,737 |

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- Definition Revenue Recognition from Contracts with Customers [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130551-203045 + Details
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