Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statement of Stockholders' Equity (Unaudited) (Parentheticals)

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Consolidated Statement of Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Additional Paid-in Capital [Member]    
Issuance of common stock, shares (in shares) 145,297 272,466
Shares withholed in net settlement upon exercise of stock options (in shares) 30,539  
Noncontrolling Interest [Member]    
Issuance of REIT preferred stock, shares (in shares)   125
Common dividends, per share (in dollars per share) $ 0.11 $ 0.05
Common dividends, per share declared (in dollars per share) $ 0.11 $ 0.05