Segment Information - Schedule of Net Revenue Attributable to Insurance, Medicare, Medicaid, and Self-Pay as Percentage of Net Air Medical Revenues (Detail) - Air Medical [Member] |
3 Months Ended | |
|---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
|
| Insurance [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Percentage of net Air Medical revenues | 70.00% | 66.00% |
| Medicare [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Percentage of net Air Medical revenues | 20.00% | 19.00% |
| Medicaid [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Percentage of net Air Medical revenues | 10.00% | 15.00% |
| Self Pay [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Percentage of net Air Medical revenues | 0.00% | 0.00% |