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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
Cumulative effect adjustment for ASU implementation | ASU 2016-01 [Member] $ 0 $ 0 $ 2,618 $ (2,645) $ 0 $ (27)
Cumulative effect adjustment for ASU implementation | ASU 2018-02 [Member] 0 0 5,575 (5,575) 0 0
Balance at Dec. 31, 2017 497 574,209 543,713 (22,077) (138,165) 958,177
Net income 0 0 83,914 0 0 83,914
Cash dividends 0 0 (31,899) 0 0 (31,899)
Net issuance of shares to employee and other stock plans 0 (2,511) 0 0 1,859 (652)
Stock-based compensation 0 3,457 0 0 0 3,457
Other comprehensive (loss) income 0 0 0 (18,815) 0 (18,815)
Balance at Sep. 30, 2018 497 575,155 603,921 (49,112) (136,306) 994,155
Balance at Jun. 30, 2018 497 574,741 585,044 (44,756) (136,597) 978,929
Net income 0 0 29,807 0 0 29,807
Cash dividends 0 0 (10,930) 0 0 (10,930)
Net issuance of shares to employee and other stock plans 0 (89) 0 0 291 202
Stock-based compensation 0 503 0 0 0 503
Other comprehensive (loss) income 0 0 0 (4,356) 0 (4,356)
Balance at Sep. 30, 2018 497 575,155 603,921 (49,112) (136,306) 994,155
Balance at Dec. 31, 2018 497 575,466 621,203 (43,174) (136,083) 1,017,909
Net income 0 0 92,061 0 0 92,061
Cash dividends 0 0 (34,174) 0 0 (34,174)
Net issuance of shares to employee and other stock plans 0 (2,916) 0 0 1,875 (1,041)
Stock-based compensation 0 3,596 0 0 0 3,596
Other comprehensive (loss) income 0 0 0 20,250 0 20,250
Balance at Sep. 30, 2019 497 576,146 679,090 (22,924) (134,208) 1,098,601
Balance at Jun. 30, 2019 497 575,794 658,107 (25,036) (134,539) 1,074,823
Net income 0 0 32,379 0 0 32,379
Cash dividends 0 0 (11,396) 0 0 (11,396)
Net issuance of shares to employee and other stock plans 0 (104) 0 0 331 227
Stock-based compensation 0 456 0 0 0 456
Other comprehensive (loss) income 0 0 0 2,112 0 2,112
Balance at Sep. 30, 2019 $ 497 $ 576,146 $ 679,090 $ (22,924) $ (134,208) $ 1,098,601