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Accounts Receivable | 12 Months Ended
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Dec. 31, 2017
Accounts Receivable. |
Accounts Receivable | Note 5—Accounts Receivable The following is a summary of accounts receivable at December 31 (in thousands):
|  | 2017 |  | 2016 |
Contracts receivable, net of allowance for doubtful accounts of $480 at December 31, 2017 and $1,030 at December 31, 2016, respectively |  | $ | 286,113 |  | $ | 340,871 |
Retention receivable |  |  | 66,586 |  |  | 46,394 |
|  |  | 352,699 |  |  | 387,265 |
Other accounts receivable |  |  | 5,476 |  |  | 735 |
|  | $ | 358,175 |  | $ | 388,000 |

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