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Financial Derivative Instruments (Schedule of Notional Amounts of Outstanding Derivative Positions) (Details) (USD $) In Thousands, unless otherwise specified |  |  |  | 6 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2014 | Dec. 31, 2013 | Jun. 30, 2014 Interest Rate Cap [Member] | Jun. 30, 2014 Interest Rate Cap 1 [Member] | Jun. 30, 2014 Interest Rate Cap 2 [Member]
Derivative [Line Items] |  |  |  |  |
Notional Amount |  |  | $ 45,000 | $ 25,000 | $ 20,000
Expiration Date |  |  |  | Jun. 30, 2021 | Jun. 30, 2024
Cap Interest Rate |  |  |  | 3.00% | 3.00%
Premium Paid |  |  |  | 921 | 1,470
Unamortized Premium | 2,391 |  |  | 921 | 1,470
Fair Value | $ 2,465 |  | $ 2,465 | $ 928 | $ 1,537

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