Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity

v3.7.0.1
Shareholders' Equity - USD ($)
1 Months Ended 3 Months Ended
Apr. 28, 2017
Mar. 31, 2017
Mar. 31, 2016
Class of Stock [Line Items]      
Net proceeds from equity offering   $ 29,959,000 $ 0
Shares issued under dividend reinvestment program   1,114,000  
Common Stock [Member]      
Class of Stock [Line Items]      
Capital shares reserved for future issuances   $ 200,000,000.0  
Stock Issued During Period, Shares, New Issues   972,000  
Stock Issued During Period, Weighted Average Price   $ 31.31  
Net proceeds from equity offering   $ 30,000,000  
Shares issued under dividend reinvestment program (in shares)   34,770  
Stock issued during period, weighted share price, Dividend Reinstated Plan   $ 32.07  
Shares issued under dividend reinvestment program   $ 1,100,000  
Subsequent Event [Member] | Common Stock [Member]      
Class of Stock [Line Items]      
Stock Issued During Period, Shares, New Issues 1,100,000    
Stock Issued During Period, Weighted Average Price $ 31.49    
Net proceeds from equity offering $ 34,100,000