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Accounts Receivable | 12 Months Ended
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Dec. 31, 2016
Accounts Receivable |
Accounts Receivable | Note 2: Accounts Receivable Accounts receivable, net consists of the following:
December 31, |  | 2016 |  |  | 2015 |
(in thousands) |  |  |  |  |  |  |  |
Trade receivables: |  |  |  |  |  |  |  |
Billed |  | $ | 122,216 |  |  | $ | 190,567 |
Unbilled |  |  | 39,223 |  |  |  | 40,731 |
Other receivables |  |  | 10,280 |  |  |  | 11,494 |
Total |  |  | 171,719 |  |  |  | 242,792 |
Less: allowance for doubtful accounts |  |  | (2,553 | ) |  |  | (10,605 | )
Accounts receivable, net |  | $ | 169,166 |  |  | $ | 232,187 |
Trade receivables relate to sale of our services and products, for which credit is extended based on our evaluation of the customer’s credit worthiness. Unbilled receivables represent revenues earned but not billed to the customer until future dates, usually within one month. Other receivables relate primarily to sale of Company property and rebates from suppliers. Changes in the Company’s allowance for doubtful accounts are as follows:
Years Ended December 31, |  | 2016 |  |  | 2015 |
(in thousands) |  |  |  |  |  |  |  |
Beginning balance |  | $ | 10,605 |  |  | $ | 15,351 |
Bad debt expense (reduction) |  |  | 6,021 |  |  |  | (2,958 | )
Accounts written-off |  |  | (14,101 | ) |  |  | (2,825 | )
Recoveries |  |  | 28 |  |  |  | 1,037 |
Ending balance |  | $ | 2,553 |  |  | $ | 10,605 |

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