v3.7.0.1

Segment Information - Schedule of Financial Information Concerning Reportable Operating Segments (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenues, net | $ 146,424 | $ 167,136 | $ 281,042 | $ 331,152
Total segment direct expenses | 126,951 | 152,417 | 263,464 | 304,971
Total segment selling, general and administrative expenses | 14,247 | 11,778 | 27,290 | 23,451
Total net segment profit | 4,228 | 7,163 | (11,713) | 6,593
Interest expense | (8,083) | (7,540) | (16,278) | (15,073)
(Loss) earnings before income taxes | (3,150) | 117 | (26,223) | (7,371)
Reportable Operating Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenues, net | 146,424 | 167,136 | 281,042 | 331,152
Total segment direct expenses | 127,941 | 152,493 | 265,457 | 305,047
Total segment selling, general and administrative expenses | 5,254 | 4,520 | 10,192 | 8,866
Total segment expenses | 133,195 | 157,013 | 275,649 | 313,913
Total net segment profit | 13,229 | 10,123 | 5,393 | 17,239
Reportable Operating Segments [Member] | Oil and Gas [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenues, net | 74,668 | 83,185 | 146,399 | 171,622
Total segment direct expenses | 73,681 | 87,400 | 155,410 | 179,316
Total segment selling, general and administrative expenses | 1,635 | 1,605 | 3,354 | 3,132
Total net segment profit | (648) | (5,820) | (12,365) | (10,826)
Reportable Operating Segments [Member] | Air Medical [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenues, net | 67,222 | 75,547 | 122,559 | 145,607
Total segment direct expenses | 50,402 | 58,997 | 101,243 | 116,041
Total segment selling, general and administrative expenses | 3,263 | 2,642 | 6,144 | 5,237
Total net segment profit | 13,557 | 13,908 | 15,172 | 24,329
Reportable Operating Segments [Member] | Technical Services [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenues, net | 4,534 | 8,404 | 12,084 | 13,923
Total segment direct expenses | 3,858 | 6,096 | 8,804 | 9,690
Total segment selling, general and administrative expenses | 356 | 273 | 694 | 497
Total net segment profit | 320 | 2,035 | 2,586 | 3,736
Segment Reconciling Items [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Other, net | 697 | 4,792 | 1,761 | 5,048
Interest expense | (8,083) | (7,540) | (16,278) | (15,073)
Corporate [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Unallocated selling, general and administrative costs | $ (8,993) | $ (7,258) | $ (17,099) | $ (14,585)

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