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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Class A Common Stock
Class B Common Stock
Preferred Stock
Preferred Stock
Series A Preferred Stock
Preferred Stock
Series B Preferred Stock
Preferred Stock
Series C Preferred Stock
Preferred Stock
Series D Preferred Stock
Common Stock
Common Stock
Class A Common Stock
Common Stock
Class B Common Stock
Additional Paid-in Capital
Retained Earnings
Treasury Stock
Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2013 $ 324,708       $ 31,934 $ 10,000 $ 37,943 $ 0   $ 210 $ 6 $ 256,306 $ 16,820 $ (27,911) $ (600)
Comprehensive income:                              
Net income 20,095 $ 19,638 $ 457                   20,095    
Other comprehensive income, net 499                           499
Issuance of stock 54,901                 87   54,814      
Issuance of tangible equity units 51,182                     51,182      
Repurchase of 23,502 shares of common stock (280)                         (280)  
Reclassification adjustment for awards issued from treasury stock 0                     1,926   (1,926)  
Exercise of stock options 993                     993      
Issuance of stock awards from treasury stock 0                     (319)   319  
Tax effect from stock compensation plan 401                     401      
Shares purchased under the Dividend Reinvestment Plan 440                     518 (78)    
Stock option compensation expense 357                     357      
Restricted stock compensation expense 4,196                     4,196      
Stock appreciation right expense 1,364                     1,364      
Dividends declared (9,415)                       (9,415)    
Preferred stock dividends (2,730)                       (2,730)    
Ending Balance at Sep. 30, 2014 446,711       31,934 10,000 37,943 0   297 6 371,738 24,692 (29,798) (101)
Beginning Balance at Dec. 31, 2014 503,315       31,934 10,000 37,943 0   358 6 422,910 29,589 (29,798) 373
Comprehensive income:                              
Net income 43,034 $ 43,018 $ 16                   43,034    
Other comprehensive income, net 1,212                           1,212
Issuance of stock       $ 110,873       110,873 $ 0 36 (6) (30)      
Exercise of stock options 465                     (263)   728  
Shares purchased under the Dividend Reinvestment Plan (2)                     148 (150)    
Stock option compensation expense 357                     357      
Restricted stock compensation expense 6,285                     6,285      
Stock appreciation right expense 188                     188      
Restricted stock surrendered due to employee tax liability (1,810)                 (1)   (1,809)      
Tax effect from stock compensation plan (187)                     (187)      
Stock appreciation right dividend equivalents (528)                       (528)    
Dividends declared (12,875)                       (12,875)    
Preferred stock dividends (6,793)                       (6,793)    
Ending Balance at Sep. 30, 2015 $ 643,534       $ 31,934 $ 10,000 $ 37,943 $ 110,873   $ 393 $ 0 $ 427,599 $ 52,277 $ (29,070) $ 1,585