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Basis of Presentation and Accounting Policy (Revenue Recognition Narrative) (Details) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2014
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Dec. 31, 2013
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Mar. 31, 2013
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Dec. 31, 2012
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|---|---|---|---|---|
| Nature of Operations and Accounting Policies [Line Items] | ||||
| Deferred revenue | $ 26,469 | $ 24,243 | $ 12,733 | $ 8,953 |
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Aeroleo [Member]
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| Nature of Operations and Accounting Policies [Line Items] | ||||
| Deferred revenue | 23,700 | |||
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Customer [Member]
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| Nature of Operations and Accounting Policies [Line Items] | ||||
| Deferred revenue | $ 2,400 |