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Financial Instruments (Details) (Recurring, USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Restricted investment: |  |
Guaranteed Investment Contract |  | $ 5,742
Rabbi Trust | 11,044 | 9,534
Fixed income securities | 1,994 | 1,993
Interest rate cap derivatives assets | 1,161 |
Liabilities: |  |
Interest rate swap derivatives | 7,048 | 390
Quoted Prices in Active Markets (Level 1) |  |
Restricted investment: |  |
Guaranteed Investment Contract |  | 0
Rabbi Trust | 0 | 0
Fixed income securities | 0 | 0
Interest rate cap derivatives assets | 0 |
Liabilities: |  |
Interest rate swap derivatives | 0 | 0
Significant Other Observable Inputs (Level 2) |  |
Restricted investment: |  |
Guaranteed Investment Contract |  | 5,742
Rabbi Trust | 11,044 | 9,534
Fixed income securities | 1,994 | 1,993
Interest rate cap derivatives assets | 1,161 |
Liabilities: |  |
Interest rate swap derivatives | 7,048 | 390
Significant Unobservable Inputs (Level 3) |  |
Restricted investment: |  |
Guaranteed Investment Contract |  | 0
Rabbi Trust | 0 | 0
Fixed income securities | 0 | 0
Interest rate cap derivatives assets | 0 |
Liabilities: |  |
Interest rate swap derivatives | $ 0 | $ 0

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