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Permanent Equity (Dividends and Distributions) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Total Stockholders' Equity [Member] |  |  |
Class of Stock [Line Items] |  |  |
Dividends | $ 1,193 | $ 1,278 | $ 1,066
Non-Controlling Interest [Member] |  |  |
Class of Stock [Line Items] |  |  |
Dividends | $ 427 | $ 419 | $ 431

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