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Basis of Presentation and Accounting Policy (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2015
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Dec. 31, 2014
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Mar. 31, 2014
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Dec. 31, 2013
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| Nature of Operations and Accounting Policies [Line Items] | ||||
| Deferred revenue | $ 32,666us-gaap_DeferredRevenue | $ 31,047us-gaap_DeferredRevenue | $ 26,469us-gaap_DeferredRevenue | $ 24,243us-gaap_DeferredRevenue |
| Aeroleo [Member] | ||||
| Nature of Operations and Accounting Policies [Line Items] | ||||
| Deferred revenue |
$ 32,700us-gaap_DeferredRevenue / era_CustomerAxis = era_AeroleoMember |
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- Definition
Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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