Summary of Significant Accounting Policies - Schedule of Net Revenue Attributable to Medicaid, Medicare, Private Insurance and Self Pay as Percentage of Net Air Medical Independent Provider Model Revenues (Detail) - Air Medical [Member] |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Insurance [Member] | |||
| Segment Reporting Information [Line Items] | |||
| Percentage of net Air Medical revenues | 72.00% | 74.00% | 74.00% |
| Medicare [Member] | |||
| Segment Reporting Information [Line Items] | |||
| Percentage of net Air Medical revenues | 18.00% | 17.00% | 18.00% |
| Medicaid [Member] | |||
| Segment Reporting Information [Line Items] | |||
| Percentage of net Air Medical revenues | 9.00% | 8.00% | 8.00% |
| Self Pay [Member] | |||
| Segment Reporting Information [Line Items] | |||
| Percentage of net Air Medical revenues | 1.00% | 1.00% | 0.00% |