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Basis Of Presentation And New Accounting Standards (Tables) | 9 Months Ended
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Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of the impact of ASC Topic 606 | The impact of ASC 606 for the three- and nine-month periods ended September 30, 2018, which primarily relates to the acceleration of lump sum demobilization fees (Note 9), was as follows (in thousands):
| September 30, 2018
| As Reported |  | Pro Forma Without Adoption of ASC 606 |  | Effect of Change
Balance Sheet |  |  |  |  |
Assets |  |  |  |  |
Unbilled and other | $ | 66,396 |  |  | $ | 67,263 |  |  | $ | (867 | )
Other current assets | 47,450 |  |  | 46,104 |  |  | 1,346 |
Liabilities |  |  |  |  |
Accrued liabilities | 84,431 |  |  | 84,705 |  |  | (274 | )
Deferred tax liabilities | 102,742 |  |  | 102,584 |  |  | 158 |
Equity |  |  |  |  |
Retained earnings | 396,781 |  |  | 396,186 |  |  | 595 |
| Three Months Ended September 30, 2018 |  | Nine Months Ended September 30, 2018
| As Reported |  | Pro Forma Without Adoption of ASC 606 |  | Effect of Change |  | As Reported |  | Pro Forma Without Adoption of ASC 606 |  | Effect of Change
Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Net revenues | $ | 212,575 |  |  | $ | 212,965 |  |  | $ | (390 | ) |  | $ | 581,462 |  |  | $ | 580,709 |  |  | $ | 753 |
Income from operations | 31,377 |  |  | 31,767 |  |  | (390 | ) |  | 55,033 |  |  | 54,280 |  |  | 753 |
Income before income taxes | 27,962 |  |  | 28,352 |  |  | (390 | ) |  | 43,571 |  |  | 42,818 |  |  | 753 |
Income tax provision | 841 |  |  | 923 |  |  | (82 | ) |  | 1,226 |  |  | 1,068 |  |  | 158 |
Net income | 27,121 |  |  | 27,429 |  |  | (308 | ) |  | 42,345 |  |  | 41,750 |  |  | 595 |

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- Definition Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=109236672&loc=d3e765-108305 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.10-01.(b)(6)) -URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22580-107794 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=109236672&loc=d3e725-108305 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22583-107794 + Details
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