XML 49 R38.htm IDEA: XBRL DOCUMENT v3.19.1
Stockholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Apr. 30, 2019
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Feb. 28, 2018
Class of Stock [Line Items]          
Total allowable shares (in shares)   375,000,000   375,000,000  
Net proceeds   $ 5,279 $ 1,554    
Total shares issued (in shares)   161,978,308   161,503,585  
Common stock dividends   $ 80,566 $ 72,733    
Common stock per share (in dollars per share)   $ 0.500 $ 0.475    
Common stock dividends declared (in dollars per share)   $ 0.50 $ 0.475    
Subsequent Event          
Class of Stock [Line Items]          
Common stock dividends declared (in dollars per share) $ 0.500        
Series E Preferred Stock          
Class of Stock [Line Items]          
Dividends   $ 4,097 $ 4,097    
Per depository share (in dollars per share)   $ 0.356250 $ 0.356250    
Dividend rate   5.70%   5.70%  
Series F Preferred Stock          
Class of Stock [Line Items]          
Dividends   $ 4,485 $ 4,485    
Per depository share (in dollars per share)   $ 0.325000 $ 0.325000    
Dividend rate   5.20%   5.20%  
DRIP          
Class of Stock [Line Items]          
Total allowable shares (in shares)         10,000,000
Shares of common stock (in shares)   101,180 44,659    
Net proceeds   $ 5,279 $ 1,491    
2018 ATM          
Class of Stock [Line Items]          
Total allowable shares (in shares)   12,000,000      
Total shares issued (in shares)   7,378,163