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Related Party Transactions (Narrative) (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 USD ($) h / yr item | Mar. 31, 2016 USD ($) | Dec. 31, 2016 USD ($)
Related Party Transaction [Line Items] |  |  |
Outstanding accounts payable | $ 129,100,000 |  | $ 192,275,000
AXIS Capital [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Due to related parties, current | 752,000 |  | 808,000
Principal payments (including interest) | $ 69,000 | $ 69,000 |
Weighted average interest rate | 6.80% |  |
Board of Directors Chairman [Member] | Aircraft Lease [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Number of related party transaction agreements | item | 2 |  |
Number of leased aircrafts | item | 2 |  |
Aircraft lease amount payable, per month | $ 9,766 |  |
Aircraft hours available each year under lease | h / yr | 125 |  |
Cash payments | $ 60,000 | $ 48,000 |
Outstanding accounts payable | $ 0 |  | $ 0

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