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Accounts Receivable (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounts Receivable |
Schedule of components of accounts receivables |
December 31, |  | 2018 |  |  | 2017 |
(in thousands) |  |  |  |  |  |  |  |
Trade receivables: |  |  |  |  |  |  |  |
Billed |  | $ | 266,660 |  |  | $ | 296,588 |
Unbilled |  |  | 56,408 |  |  |  | 68,494 |
Other receivables |  |  | 5,278 |  |  |  | 17,242 |
Total |  |  | 328,346 |  |  |  | 382,324 |
Less: allowance for doubtful accounts |  |  | (4,813 | ) |  |  | (4,471 | )
Accounts receivable, net |  | $ | 323,533 |  |  | $ | 377,853 |
Schedule of changes in allowance for doubtful accounts |
Years Ended December 31, |  | 2018 |  |  | 2017 |
(in thousands) |  |  |  |  |  |  |  |
Beginning balance |  | $ | 4,471 |  |  | $ | 2,553 |
Bad debt expense |  |  | 588 |  |  |  | 1,441 |
Accounts written-off |  |  | (260 | ) |  |  | (105 | )
Recoveries |  |  | 14 |  |  |  | 582 |
Ending balance |  | $ | 4,813 |  |  | $ | 4,471 |

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- Definition Tabular disclosure of financing receivables (examples of financing receivables include loans, trade accounts receivable and notes receivable) and activity in the allowance for credit losses account. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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