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 Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Equity [Abstract]        
Number of common shares reserved for issuance under dividend reinvestment plan (in shares) 3,750,000   3,750,000  
Number of common shares issued from dividend reinvestment plan and outstanding as of period-end (in shares) 306,749   306,749  
Accumulated proceeds from issuance of common shares from dividend reinvestment plan $ 5.2   $ 5.2  
Number of common shares issued during period from dividend reinvestment plan (in shares) 20,263 12,926 36,761 25,156
Proceeds from issuance of common shares during period from dividend reinvestment plan $ 0.1 $ 0.2 $ 0.2 $ 0.3