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Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Income Statement [Abstract] |  |
Revenues | $ 501,810 | $ 404,490
Operating costs and expenses: |  |
Costs of services provided | 469,904 | 345,570
Selling, general and administrative expense | 33,777 | 28,210
Other income, net: |  |
Investment and interest | 476 | 1,569
(Loss) income before income taxes | (1,395) | 32,279
Income tax (benefit) provision | (1,467) | 10,262
Net income | $ 72 | $ 22,017
Per share data: |  |
Basic earnings per common share (in dollars per share) | $ 0.00 | $ 0.30
Diluted earnings per common share (in dollars per share) | $ 0.00 | $ 0.30
Weighted average number of common shares outstanding: |  |
Basic (in shares) | 73,913 | 73,074
Diluted (in shares) | 74,725 | 73,946
Comprehensive income: |  |
Net income | $ 72 | $ 22,017
Other comprehensive income: |  |
Unrealized (loss) gain on available-for-sale marketable securities, net of taxes | (1,138) | 479
Total comprehensive (loss) income | $ (1,066) | $ 22,496

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- Definition Total costs related to services rendered by an entity during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(d)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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