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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
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, 2015 $ 652,405 $ 190,750   $ 395 $ 1 $ 429,790 $ 63,534 $ (29,070) $ (2,995)
Comprehensive income:                  
Net income 82,152           82,152    
Other comprehensive income, net 10,060               10,060
Issuance of stock   120,255 $ 175,090 118 1 174,971      
Redemption of preferred stock (42,000) (41,934)         (66)    
Issuance of common stock for Stock Employee Compensation Trust 0     25   (25)      
Cash settlement and exercise of stock options (359)         (359)      
Share-based compensation expense 8,527         8,527      
Restricted stock surrendered due to employee tax liability (3,886)     (2)   (3,884)      
Tax effect from stock compensation plan 1,877         1,877      
Shares purchased under the Dividend Reinvestment Plan (2)         172 (174)    
Stock appreciation right dividend equivalents (558)           (558)    
Dividends declared (17,336)           (17,336)    
Preferred stock dividends (14,801)           (14,801)    
Ending Balance at Sep. 30, 2016 971,424 269,071   536 2 611,069 112,751 (29,070) 7,065
Beginning Balance at Dec. 31, 2016 980,239 269,071   537 2 614,226 134,515 (29,070) (9,042)
Comprehensive income:                  
Net income 46,407           46,407    
Other comprehensive income, net 16,850               16,850
Issuance of stock     $ 0 5 2 (7)      
Cash settlement and exercise of stock options 1,963     3   1,676   284  
Share-based compensation expense 9,912         9,912      
Restricted stock surrendered due to employee tax liability (6,022)     (3)   (6,019)      
Shares purchased under the Dividend Reinvestment Plan (62)         61 (123)    
Stock appreciation right dividend equivalents (608)           (608)    
Dividends declared (19,433)           (19,433)    
Preferred stock dividends (15,338)           (15,338)    
Ending Balance at Sep. 30, 2017 $ 1,013,908 $ 269,071   $ 542 $ 4 $ 619,849 $ 145,420 $ (28,786) $ 7,808