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Nature of Operations And Basis of Presentation (Details)	Dec. 31, 2018 Air_craft
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Number of Aircraft engines	23
North Shore Aviation Holdings LLC [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	27.50%
Number of Aircraft engines	5

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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