XML 18 R6.htm IDEA: XBRL DOCUMENT v3.7.0.1
Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional paid-in capital [Member]
Retained earnings [Member]
Accumulated other comprehensive income (loss) [Member]
Treasury stock [Member]
Beginning of year at Dec. 31, 2015   $ 201,723 $ 326,656 $ 1,446,192 $ (9,425) $ (567,105)
Dividend reinvestment plan (shares: 8,249 – 2017; 10,931 – 2016)   22 351      
Stock purchase and compensation plans (shares: 399,762 – 2017; 386,567 – 2016)   773 6,958      
Net income $ 37,032     37,032    
Dividends to stockholders ($0.16 per share – 2017; $0.15 per share – 2016)       (8,789)    
Other comprehensive income 45,422       45,422  
Acquisition of treasury stock (shares: 127,647 – 2017; 122,250 – 2016)           (3,845)
End of period at Mar. 31, 2016 1,475,965 202,518 333,965 1,474,435 35,997 (570,950)
Beginning of year at Dec. 31, 2016 1,531,370 203,241 347,295 1,568,881 (15,950) (572,097)
Dividend reinvestment plan (shares: 8,249 – 2017; 10,931 – 2016)   16 348      
Stock purchase and compensation plans (shares: 399,762 – 2017; 386,567 – 2016)   800 6,596      
Net income 50,440     50,440    
Dividends to stockholders ($0.16 per share – 2017; $0.15 per share – 2016)       (9,459)    
Other comprehensive income 18,040       18,040  
Acquisition of treasury stock (shares: 127,647 – 2017; 122,250 – 2016)           (5,572)
End of period at Mar. 31, 2017 $ 1,592,579 $ 204,057 $ 354,239 $ 1,609,862 $ 2,090 $ (577,669)