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Equity (Details) - USD ($)
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Common Stock Repurchase    
Repurchase of common stock authorized by Board of Directors $ 60,000,000.0  
Common stock repurchased (in shares) 0 7,671
Common stock repurchased, value   $ 317,000
Weighted average price per share (in dollars per share)   $ 41.34
Remaining authorized stock repurchase amount $ 56,400,000  
Dividend rate (as a percent) 6.50%  
Preferred stock dividends paid $ 800,000 $ 800,000
Common Stock    
Common Stock Repurchase    
Common stock repurchased (in shares)   8,000
Common stock repurchased, value   $ 0