| Stockholders' Equity Dividend Reinvestment and Direct Stock Purchase Plan (Details) - USD ($) $ in Thousands | 3 Months Ended | |
|---|---|---|
| Mar. 31, 2016 | Mar. 31, 2015 | |
| Class of Stock [Line Items] | ||
| Common Stock, Capital Shares Reserved for Future Issuance | 7,500,000 | |
| Stock Issued and Outstanding, Shares, Dividend Reinvestment Plan | 297,940 | |
| Stock Issued and Outstanding, Value, Dividend Reinvestment Plan | $ 3,069 | |
| Stock Issued During Period, Shares, Dividend Reinvestment Plan | 14,648 | 19,412 | 
| Stock Issued During Period, Value, Dividend Reinvestment Plan | $ 110 | $ 200 | 
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- Definition Number of shares issued and outstanding as of period-end from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity. No definition available. 
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- Definition Proceeds from (value of) stock issued and outstanding at period-end from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the holder of the stock to reinvest dividends paid to them by the entity on new issues of stock by the entity. No definition available. 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition Aggregate number of common shares reserved for future issuance. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Number of shares issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Value of stock issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the holder of the stock to reinvest dividends paid to them by the entity on new issues of stock by the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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