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Consolidated Statements Of Changes In Stockholders Equity Unaudited - USD ($)
$ in Thousands
Capital Stock [Member]
Paid-In Capital [Member]
Retained Earnings [Member]
Treasury Stock-At Cost [Member]
Deferred Compensation Payable In Company Stock [Member]
Total
Balance at Dec. 31, 2019 $ 35,811 $ 860,671 $ 1,425,752 $ (1,597,940) $ 2,314 $ 726,608
Net income     205,714     205,714
Dividends paid     (15,639)     (15,639)
Stock awards and exercise of stock options 326 64,948   (32,716)   32,558
Purchases of treasury stock       (147,123)   (147,123)
Other   (348) (362) (30) 30 (710)
Balance at Sep. 30, 2020 36,137 925,271 1,615,465 (1,777,809) 2,344 801,408
Balance at Jun. 30, 2020 36,040 904,421 1,553,144 (1,745,299) 2,390 750,696
Net income     67,722     67,722
Dividends paid     (5,401)     (5,401)
Stock awards and exercise of stock options 97 20,636   (7,581)   13,152
Purchases of treasury stock       (24,975)   (24,975)
Other   214   46 (46) 214
Balance at Sep. 30, 2020 36,137 925,271 1,615,465 (1,777,809) 2,344 801,408
Balance at Dec. 31, 2020 36,259 961,404 1,723,777 (1,822,579) 2,339 901,200
Net income     193,925     193,925
Dividends paid     (16,457)     (16,457)
Stock awards and exercise of stock options 143 45,870   (14,681)   31,332
Purchases of treasury stock       (330,380)   (330,380)
Other   232     (133) 99
Balance at Sep. 30, 2021 36,402 1,007,506 1,901,245 (2,167,640) 2,206 779,719
Balance at Jun. 30, 2021 36,385 999,697 1,834,835 (2,002,326) 2,183 870,774
Net income     72,003     72,003
Dividends paid     (5,593)     (5,593)
Stock awards and exercise of stock options 17 8,233   (1,426)   6,824
Purchases of treasury stock       (163,731)   (163,731)
Other   (424)   (157) 23 (558)
Balance at Sep. 30, 2021 $ 36,402 $ 1,007,506 $ 1,901,245 $ (2,167,640) $ 2,206 $ 779,719