Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity - Narrative (Details)

v3.19.1
Shareholders' Equity - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 25 Months Ended
Apr. 30, 2019
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2019
Capital Unit [Line Items]        
Repurchase and retirement of common stock (in shares)       25,184,105
Repurchase and retirement of common stock   $ 1,052 $ 1,729 $ 66,116
Shares available for purchase (in shares)   2,315,895   2,315,895
Non-cash compensation expense   $ 1,494 $ 1,494  
Shares surrendered for tax withholdings (in shares)   341,704 239,481,000  
Preferred stock dividends declared and paid   $ 8,590 $ 8,508  
Common stock dividends declared and paid   $ (1,794) (1,960)  
Series A Preferred Stock        
Capital Unit [Line Items]        
Dividends paid per share on monthly basis (in dollars per share)   $ 0.1667    
At the market stock issued during period   287,230    
Proceeds from at the market stock   $ 6,915    
Common Stock        
Capital Unit [Line Items]        
Common stock cash dividend (in dollars per share)   $ 0.0125    
Employees        
Capital Unit [Line Items]        
Stock-based compensation   $ 1,483 1,487  
Consultants and Independent Financial Advisors        
Capital Unit [Line Items]        
Stock-based compensation   11 $ 7  
Options        
Capital Unit [Line Items]        
Unrecognized compensation cost for stock based compensation   $ 172   $ 172
Unrecognized compensation cost for stock based compensation, period of recognition   7 months 73 days    
Purchase of shares (in shares)   170,217    
Intrinsic value of options exercised   $ 235    
Restricted shares        
Capital Unit [Line Items]        
Unrecognized compensation cost for stock based compensation   $ 13,797   13,797
Unrecognized compensation cost for stock based compensation, period of recognition   3 years 20 days    
Restricted shares | Employees        
Capital Unit [Line Items]        
Non-cash compensation expense   $ 1,483    
Restricted shares | Awards Granted In 2019 [Member]        
Capital Unit [Line Items]        
Unrecognized compensation cost for stock based compensation   $ 7,046   $ 7,046
Unrecognized compensation cost for stock based compensation, period of recognition   3 years 7 months 65 days    
Options, Warrants, and Other        
Capital Unit [Line Items]        
Shares surrendered for tax withholdings (in shares)   341,704    
Subsequent Event        
Capital Unit [Line Items]        
Shares authorized for repurchase (in shares) (up to) 37,500,000      
Additional shares authorized for repurchase (in shares) (up to) 10,000,000      
Subsequent Event | Series A Preferred Stock        
Capital Unit [Line Items]        
At the market stock issued during period 101,977      
Proceeds from at the market stock $ 2,549