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Commitments and Contingencies - Additional Information (Narrative) (Details)
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12 Months Ended |
0 Months Ended |
12 Months Ended |
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Dec. 31, 2014
USD ($)
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Dec. 31, 2013
USD ($)
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Dec. 31, 2012
USD ($)
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Dec. 31, 2014
Environmental Remediation Matters
USD ($)
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May 31, 2014
Fortis
USD ($)
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May 31, 2014
Fortis
EUR (€)
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Aug. 27, 2012
Fortis
USD ($)
Helicopter
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Aug. 27, 2012
Fortis
EUR (€)
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Aug. 31, 2012
Arizona
Sites
Parties
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Dec. 31, 2014
Customer Relationships (EHI)
USD ($)
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Dec. 31, 2013
Customer Relationships (EHI)
USD ($)
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| Loss Contingencies [Line Items] |
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| First portion of cleanup costs to be borne by the former owner |
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$ 1,500,000 |
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| Second portion of cleanup costs to be shared by the entity and former owner equally |
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1,000,000 |
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| Cleanup costs, in excess of specified amount, to be borne by the former owner |
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2,500,000 |
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| Loss contingencies, liability paid |
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400,000 |
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| Entity's share of financial responsibility |
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500,000 |
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| Remaining entity's share of financial responsibility liability |
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100,000 |
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| Time frame to monitor the site |
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20 years |
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| Amount of damages for the payment of VAT levied |
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1,000,000 |
800,000 |
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| Number of helicopters purchased from plaintiff |
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2 |
2 |
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| Amount paid in final settlement |
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55,000 |
40,000 |
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| Number of Alleged Cleanup Sites |
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2 |
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| Number of parties responsible for contamination |
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101 |
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| Accounts payable due |
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9,000,000 |
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| Operating Leases, Rent Expense |
2,300,000 |
1,800,000 |
700,000 |
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20,200,000 |
14,000,000 |
| Outstanding Purchase Orders |
$ 29,600,000 |
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