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Term Loan (Details) - USD ($) | 1 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2015 | Jan. 31, 2013 | Jun. 30, 2015 | Dec. 31, 2014
Credit facility |  |  |  |
Term loans | $ 320,000,000 |  | $ 320,000,000 | $ 70,000,000
Unsecured debt |  |  |  |
Credit facility |  |  |  |
Term loans | $ 250,000,000 | $ 70,000,000 | 250,000,000 |
Variable reference rate | one month LIBOR | one month LIBOR |  |
Variable interest rate, basis points spread over variable reference rate (as a percent) | 0.95% | 1.20% |  |
Maximum interest rate (as a percent) | 2.67% | 2.15% |  |
Deferred financing costs incurred |  |  | 303,000 |
Deferred finance costs | $ 156,000 |  | $ 156,000 | $ 187,000

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