Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2014
Accounting Policies [Abstract]  
Schedule of Estimated Useful Lives of Aircraft and Property, Plant and Equipment
Aircraft and property, plant, and equipment are recorded at cost. Depreciation is provided over the estimated useful lives of the assets as follows:
Aircraft
15 years
Buildings
20 years
Vehicles and equipment
3-5 years
Summary of Customers that Accounted for at Least 10% of Company's Net Revenues
The following is a summary of customers that accounted for at least 10% of the Company's net revenues in 2014, 2013, or 2012:

 
Segment
 
Year Ended 
 December 31, 2014
 
Year Ended 
 December 31, 2013
 
Year Ended 
 December 31, 2012
Fluor(1)
Government
 
17.4
%
 
14.8
%
 
—

U.S. Forest Service
Government
 
13.0
%
 
14.7
%
 
28.6
%
Italian Ministry of Civil Protection (2)
Government
 
—
%
 
3.0
%
 
12.9
%

 
 
30.4
%
 
32.5
%
 
41.5
%

(1)
Fluor was a customer serviced by Evergreen Helicopters for the year ended December 31, 2012.
(2)
Our contract to provide services to the Italian Ministry of Civil Protection expired in June 2013.
Schedule Of Concentration Of Risk By Accounts Receivable
The following is a summary of customers that accounted for at least 10% of the total current and non-current trade receivables as of December 31, 2014 and December 31, 2013:

 
December 31, 2014
 
December 31, 2013
Fluor
14.4
%
 
19.4
%
Alion Science and Technology Corporation
11.8
%
 
—
%
Army Contracting Command – Rock Island
4.7
%
 
13.8
%
Hellenic Fire Brigade(1)
10.8
%
 
8.5
%

41.7
%
 
41.7
%

(1)
On May 23, 2012, the Company entered into a three year agreement with the NATO Maintenance and Supply Agency (“NAMSA”), pursuant to which the Company agreed to supply aerial firefighting services in Greece for the 2012 to 2014 firefighting seasons. Prior to the agreement with NAMSA, the Company contracted directly with the Hellenic Fire Brigade to provide firefighting services in Greece. At December 31, 2013, the receivable from Hellenic Fire Brigade was classified in other non-current assets due to the long-term nature of obtaining resolution regarding the Company’s permanent establishment status in Greece.