Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity - Narrative (Details)

v3.8.0.1
Shareholders' Equity - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended 127 Months Ended
May 12, 2017
Oct. 31, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
May 22, 2017
Dec. 31, 2016
Nov. 30, 2016
May 18, 2016
May 17, 2016
Nov. 30, 2014
Oct. 31, 2011
Mar. 31, 2007
Capital Unit [Line Items]                              
Shares authorized for repurchase (in shares) (up to)                   10,000,000     10,000,000   2,500,000
Shares authorized for additional repurchase (in shares)                           5,000,000  
Repurchase and retirement of common stock (in shares)     680,801   1,578,675   19,078,675                
Repurchase and retirement of common stock         $ 4,450   $ 48,568                
Shares repurchased, value     $ 1,682   $ 3,878                    
Shares available for purchase (in shares)     8,421,325   8,421,325   8,421,325                
Payment to option holder $ 850                            
Non-cash compensation expense     $ 1,341 $ 1,300 $ 4,148 $ 3,996                  
Shares surrendered for tax withholdings (in shares)         218,587                    
Preferred stock, shares authorized (in shares)     50,000,000   50,000,000   50,000,000   50,000,000   50,000,000 25,000,000      
Common stock, shares authorized (in shares)     1,000,000,000   1,000,000,000   1,000,000,000   1,000,000,000   1,000,000,000 800,000,000      
Issuance of Series A preferred stock         $ 18,032 $ 27,621                  
Common stock cash dividend (in dollars per share)     $ 0.01   $ 0.01                    
Series A Preferred Stock                              
Capital Unit [Line Items]                              
Preferred stock, shares authorized (in shares)     23,844,916   23,844,916   23,844,916 6,554,916 17,290,000            
Preferred shares sold in period     353,653   751,912                    
Issuance of Series A preferred stock     $ 8,825   $ 18,736                    
Commission paid     276   706                    
Dividends paid     8,149   $ 24,026                    
Dividends paid per share on monthly basis (in USD per share)         $ 0.1667                    
Common Stock                              
Capital Unit [Line Items]                              
Dividends paid     1,962   $ 1,962                    
Employees                              
Capital Unit [Line Items]                              
Non-cash compensation expense         4,108                    
Options                              
Capital Unit [Line Items]                              
Unrecognized compensation cost for stock based compensation     $ 2,169   $ 2,169   $ 2,169                
Unrecognized compensation cost for stock based compensation, period of recognition         1 year 4 months 17 days                    
Options voluntarily canceled and terminated 3,000,000                            
Exercise price per share $ 1.91                            
Purchase of shares (in shares)     2,167,396   3,908,393                    
Intrinsic value of options exercised     $ 864   $ 1,423                    
Restricted shares                              
Capital Unit [Line Items]                              
Unrecognized compensation cost for stock based compensation     $ 6,520   $ 6,520   6,520                
Unrecognized compensation cost for stock based compensation, period of recognition         2 years 5 months 22 days                    
Restricted stock forfeited (in shares)     5,000   5,000                    
Restricted shares | Employees                              
Capital Unit [Line Items]                              
Non-cash compensation expense     $ 1,324   $ 4,108                    
Restricted shares | Consultants and Independent Financial Advisors                              
Capital Unit [Line Items]                              
Non-cash compensation expense     17   40                    
Restricted shares | Awards Granted in 2017                              
Capital Unit [Line Items]                              
Unrecognized compensation cost for stock based compensation     $ 3,356   $ 3,356   $ 3,356                
Unrecognized compensation cost for stock based compensation, period of recognition         3 years 32 days                    
Options, Warrants, and Other                              
Capital Unit [Line Items]                              
Shares surrendered for tax withholdings (in shares)     1,787,686   1,953,264                    
Subsequent Event | Series A Preferred Stock                              
Capital Unit [Line Items]                              
Preferred shares sold in period   415,247                          
Issuance of Series A preferred stock   $ 10,317                          
Commission paid   $ 206