Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Provisions for Contractual Discounts and Uncompensated Care Applied to Air Medical Trade Receivables Expressed as Percentage of Total Segment Accounts Receivable

Provisions for contractual discounts and uncompensated care that we applied to our Air Medical trade receivables (expressed as a percentage of total segment accounts receivable) at December 31 were as follows:

	2017	2016
Allowance for contractual discounts	53%	56%
Allowance for uncompensated care	24%	23%

Schedule of Goodwill

The following table summarizes recent activity regarding the Company's goodwill (in thousands):

	Oil & Gas	Air Medical	Technical Services	Total
Balance December 31, 2016	—	—	—	—
Acquisition Activities	61,299	—	—	61,299
Balance December 31, 2017	61,299	—	—	61,299

Schedule of Intangible Assets

Intangible assets with finite useful lives are amortized over estimated useful lives on a straight-line basis. Our intangible assets by types consist of the following (in thousands):

	Estimated Useful Lives	Gross Amount	Accumulated Amortization	Net Balance
Customer Relationship	15	11,622	—	11,622
Non-Compete Agreements	5	900	—	900
Tradenames	7	4,201	—	4,201
Total		16,723	—	16,723

Schedule of Provisions for Contractual Discounts and Estimated Uncompensated Care Applied to Air Medical Revenues Expressed as Percentage of Total Independent Provider Model Billings

Provisions for contractual discounts and estimated uncompensated care that we applied to our Air Medical revenues (expressed as a percentage of total independent provider model billings) were as follows:

	Year Ended December 31,
	2017		2016		2015
Provision for contractual discounts	66	%	67	%	65	%
Provision for uncompensated care	7	%	6	%	8	%

Schedule of Net Revenue Attributable to Medicaid, Medicare, Private Insurance and Self Pay as Percentage of Net Air Medical Independent Provider Model Revenues

Amounts attributable to Medicaid, Medicare, private insurance, and self-pay as a percentage of net Air Medical independent provider model revenues were as follows:

	Year Ended December 31,
	2017		2016		2015
Insurance	72	%	72	%	74	%
Medicare	18	%	18	%	17	%
Medicaid	9	%	9	%	8	%
Self-Pay	1	%	1	%	1	%