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Consolidated Statements of Stockholders' Equity (unaudited) - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in-Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive (Loss) Income [Member]
Common Stock in Treasury [Member]
Total
Beginning Balance at Dec. 31, 2014 $ 497 $ 576,504 $ 423,956 $ (17,027) $ (119,749) $ 864,181
Net income 0 0 57,298 0 0 57,298
Cash dividends 0 0 (28,553) 0 0 (28,553)
Purchase of treasury shares 0 0 0 0 (26,797) (26,797)
Net issuance of shares to employee benefit plans and other stock plans, including tax benefit 0 (3,423) 0 0 6,451 3,028
Stock-based compensation 0 3,397 0 0 0 3,397
Other comprehensive income 0 0 0 3,662 0 3,662
Ending Balance at Sep. 30, 2015 497 576,478 452,701 (13,365) (140,095) 876,216
Beginning Balance at Dec. 31, 2015 497 576,726 462,232 (22,418) (135,033) 882,004
Net income 0 0 58,801 0 0 58,801
Cash dividends 0 0 (28,903) 0 0 (28,903)
Purchase of treasury shares 0 0 0 0 (17,193) (17,193)
Net issuance of shares to employee benefit plans and other stock plans, including tax benefit 0 (6,164) 0 0 7,270 1,106
Stock-based compensation 0 3,096 0 0 0 3,096
Other comprehensive income 0 0 0 10,438 0 10,438
Ending Balance at Sep. 30, 2016 $ 497 $ 573,658 $ 492,130 $ (11,980) $ (144,956) $ 909,349