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CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock [Member]
Additional Paid-In Capital [Member]
Treasury Stock [Member]
Retained Earnings [Member]
Balance at Dec. 31, 2018 $ 77,676 $ 555 $ 36,752 $ (357,569) $ 397,938
Balance (shares) at Dec. 31, 2018   55,489      
Purchase of treasury stock, at cost (29,037) $ 0 0 (29,037) 0
Issuance of long-term incentive awards and dividend equivalents 0 0 (7,695) 8,646 (951)
Stock-based compensation expense 6,040 0 4,340 1,700 0
Other 599 0 436 163 0
Dividends paid (12,386) 0 0 0 (12,386)
Unrealized gain (loss) on marketable securities, net of tax 13 0 0 0 13
Net income 76,289 0 0 0 76,289
Balance at Mar. 31, 2019 119,194 $ 555 33,833 (376,097) 460,903
Balance (shares) at Mar. 31, 2019   55,489      
Balance at Dec. 31, 2019 4,079 $ 555 48,141 (544,102) 499,485
Balance (shares) at Dec. 31, 2019   55,489      
Purchase of treasury stock, at cost (61,203) $ 0 0 (61,203) 0
Issuance of long-term incentive awards and dividend equivalents 0 0 (7,088) 7,898 (810)
Stock-based compensation expense 6,552 0 4,893 1,659 0
Other 642 0 381 261 0
Dividends paid (15,557) 0 0 0 (15,557)
Unrealized gain (loss) on marketable securities, net of tax 85 0 0 0 85
Net income 62,092 0 0 0 62,092
Balance at Mar. 31, 2020 $ (3,310) $ 555 $ 46,327 $ (595,487) $ 545,295
Balance (shares) at Mar. 31, 2020   55,489