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Consolidated Statements of Changes in Shareholders' Equity - Unaudited - USD ($)
$ in Thousands
Total
Preferred Stock
Common Stock
Additional Paid in Capital
Retained Earnings
Accumulated Other Comprehensive Income/(Loss)
Treasury Stock
Beginning balance, preferred stock (shares) at Dec. 31, 2015   2,300,000          
Beginning balance, common stock (shares) at Dec. 31, 2015     26,901,801        
Beginning balance at Dec. 31, 2015 $ 553,902 $ 55,569 $ 27,432 $ 362,607 $ 124,511 $ (7,984) $ (8,233)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income from continuing operations 41,082       41,082    
Net loss from discontinued operations (3,415)       (3,415)    
Other comprehensive income 7,557         7,557  
Issuance of stock, net of offering costs (shares)   3,300,000 7,291        
Issuance of stock, net of offering costs 159 $ 79,701 $ 7 152      
Preferred stock dividends (3,348)       (3,348)    
Share-based compensation expense 2,941     2,941      
Exercise of warrants (shares)     239,478        
Exercise of warrants 1,071   $ 240 831      
Issuance of common stock under share-based compensation arrangements (shares)     138,263        
Issuance of common stock under share-based compensation arrangements 902   $ 138 764      
Ending balance, preferred stock (shares) at Jun. 30, 2016   5,600,000          
Ending balance, common stock (shares) at Jun. 30, 2016     27,286,833        
Ending balance at Jun. 30, 2016 680,552 $ 135,270 $ 27,817 367,295 158,830 (427) (8,233)
Beginning balance at Mar. 31, 2016           (5,333)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income from continuing operations 21,774            
Net loss from discontinued operations (2,291)            
Other comprehensive income 4,906            
Ending balance, preferred stock (shares) at Jun. 30, 2016   5,600,000          
Ending balance, common stock (shares) at Jun. 30, 2016     27,286,833        
Ending balance at Jun. 30, 2016 $ 680,552 $ 135,270 $ 27,817 367,295 158,830 (427) (8,233)
Beginning balance, preferred stock (shares) at Dec. 31, 2016 9,000,000 9,000,000          
Beginning balance, common stock (shares) at Dec. 31, 2016 30,289,917   30,289,917        
Beginning balance at Dec. 31, 2016 $ 855,872 $ 217,471 $ 30,820 427,008 193,698 (4,892) (8,233)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income from continuing operations 55,876       55,876    
Net loss from discontinued operations (6,407)       (6,407)    
Other comprehensive income 10,256         10,256  
Preferred stock dividends (7,229)       (7,229)    
Share-based compensation expense 2,934     2,934      
Exercise of warrants (shares)     43,974        
Exercise of warrants 420   $ 44 376      
Issuance of common stock under share-based compensation arrangements (shares)     396,893        
Issuance of common stock under share-based compensation arrangements $ (1,433)   $ 397 (1,830)      
Ending balance, preferred stock (shares) at Jun. 30, 2017 9,000,000 9,000,000          
Ending balance, common stock (shares) at Jun. 30, 2017 30,730,784   30,730,784        
Ending balance at Jun. 30, 2017 $ 910,289 $ 217,471 $ 31,261 428,488 235,938 5,364 (8,233)
Beginning balance at Mar. 31, 2017           (4,872)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income from continuing operations 28,952            
Net loss from discontinued operations (5,230)            
Other comprehensive income $ 10,236            
Ending balance, preferred stock (shares) at Jun. 30, 2017 9,000,000 9,000,000          
Ending balance, common stock (shares) at Jun. 30, 2017 30,730,784   30,730,784        
Ending balance at Jun. 30, 2017 $ 910,289 $ 217,471 $ 31,261 $ 428,488 $ 235,938 $ 5,364 $ (8,233)