A detail of the components of contracts in progress and advance billings on contracts is as follows:
| December 31, 2013 |
December 31, 2012 |
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| (In thousands) | ||||||||
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Costs incurred less costs of revenue recognized |
$ | 65,113 | $ | 65,321 | ||||
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Revenues recognized less billings to customers |
360,873 | 494,833 | ||||||
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Contracts in Progress |
$ | 425,986 | $ | 560,154 | ||||
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| December 31, 2013 |
December 31, 2012 |
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| (In thousands) | ||||||||
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Billings to customers less revenue recognized |
$ | 466,205 | $ | 394,352 | ||||
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Costs incurred less costs of revenue recognized |
(187,276 | ) | (152,656 | ) | ||||
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Advance Billings on Contracts |
$ | 278,929 | $ | 241,696 | ||||
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