XML 18 R6.htm IDEA: XBRL DOCUMENT v3.8.0.1
Consolidated Statements of Changes in Stockholders' Equity - USD ($)
$ in Thousands
Common Stock [Member]
Capital Surplus [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss), Net [Member]
Total
Balance at Dec. 31, 2015 $ 291,346 $ 1,424,448 $ 777,944 $ (80,595) $ 2,413,143
Balance, Shares Issued at Dec. 31, 2015 87,491        
Net income 97,465 97,465
Other comprehensive income 24,906 24,906
Comprehensive income 97,465 24,906 122,371
Cash dividends declared ($0.72 per common share) (57,349) (57,349)
Common stock activity, long-term incentive plan $ 6 10,135 10,141
Common stock activity, long-term incentive plan, Shares issued 2        
Issuance of stock from dividend reinvestment and stock purchase plan 821 821
Balance at Sep. 30, 2016 $ 291,352 1,435,404 818,060 (55,689) 2,489,127
Balance, Shares Issued at Sep. 30, 2016 87,493        
Balance at Dec. 31, 2016 $ 291,358 1,698,253 850,689 (120,532) $ 2,719,768
Balance, Shares Issued at Dec. 31, 2016 87,495       87,495,000
Net income 160,183 $ 160,183
Other comprehensive income 22,381 22,381
Comprehensive income 160,183 22,381 182,564
Cash dividends declared ($0.72 per common share) (62,400) (62,400)
Common stock activity, long-term incentive plan 20,910 119 21,029
Issuance of stock from dividend reinvestment and stock purchase plan 2,314 2,314
Balance at Sep. 30, 2017 $ 291,358 $ 1,721,477 $ 948,591 $ (98,151) $ 2,863,275
Balance, Shares Issued at Sep. 30, 2017 87,495       87,495,000