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Contracts in Process (Tables) | 6 Months Ended
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Jun. 30, 2018
Costs in Excess of Billings and Billings in Excess of Costs [Table Text Block] | The net asset position for contracts in process consisted of the following:
|  | June 30, |  |  | December 31, |
(In thousands) |  | 2018 |  |  | 2017 |
Costs and estimated earnings on uncompleted contracts |  | $ | 2,105,022 |  |  | $ | 1,978,981 |
Less: Billings to date |  |  | 2,066,073 |  |  |  | 1,929,640 |
|  | $ | 38,949 |  |  | $ | 49,341 |
Consolidated Balance Sheet [Member] |
Costs in Excess of Billings and Billings in Excess of Costs [Table Text Block] | The net asset position for contracts in process included in the accompanying consolidated balance sheets was as follows:
|  | June 30, |  |  | December 31, |
(In thousands) |  | 2018 |  |  | 2017 |
Costs and estimated earnings in excess of billings on uncompleted contracts |  | $ | 87,356 |  |  | $ | 78,260 |
Billings in excess of costs and estimated earnings on uncompleted contracts |  |  | (48,407 | ) |  |  | (28,919 | )
|  | $ | 38,949 |  |  | $ | 49,341 |

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- Definition Tabular disclosure for billings on uncompleted contracts in excess of costs and costs of uncompleted contracts in excess of billings. + References No definition available. + Details
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