Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity Dividend Reinvestment and Direct Stock Purchase Plan (Details)

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Stockholders' Equity Dividend Reinvestment and Direct Stock Purchase Plan (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Class of Stock [Line Items]        
Common Stock, Capital Shares Reserved for Future Issuance 7,500,000   7,500,000  
Stock Issued and Outstanding, Shares, Dividend Reinvestment Plan 312,435   312,435  
Stock Issued and Outstanding, Value, Dividend Reinvestment Plan $ 3,186   $ 3,186  
Stock Issued During Period, Shares, Dividend Reinvestment Plan 14,495 16,772 29,143 36,184
Stock Issued During Period, Value, Dividend Reinvestment Plan $ 118 $ 178 $ 228 $ 379