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Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income
Retained Earnings
Cumulative Effect, Period of Adoption, Adjustment [Member]
Retained Earnings
Non-controlling Interest
Cumulative Effect, Period of Adoption, Adjustment [Member]
Total
Beginning Balance at Dec. 31, 2019 $ 38 $ 104,849 $ (5,897) $ (102) $ 577,724 $ 546 $ (102) $ 677,260
Beginning Balance (in shares) at Dec. 31, 2019 38,358              
Stock issued from equity plans   (2,171)           (2,171)
Stock issued from equity plans (in shares) 64              
Stock-based compensation   3,048           3,048
Stock buyback   (7,248)           (7,248)
Stock buyback (in shares) (170)              
Other comprehensive income (loss)     (2,907)         (2,907)
Net income         18,063 15   18,078
Ending Balance at Mar. 31, 2020 $ 38 98,478 (8,804)   595,685 561   685,958
Ending Balance (in shares) at Mar. 31, 2020 38,252              
Beginning Balance at Dec. 31, 2019 $ 38 104,849 (5,897) $ (102) 577,724 546 $ (102) 677,260
Beginning Balance (in shares) at Dec. 31, 2019 38,358              
Stock buyback               (7,248)
Net income               47,206
Ending Balance at Jun. 30, 2020 $ 38 102,094 (9,148)   624,829 545   718,358
Ending Balance (in shares) at Jun. 30, 2020 38,325              
Beginning Balance at Mar. 31, 2020 $ 38 98,478 (8,804)   595,685 561   685,958
Beginning Balance (in shares) at Mar. 31, 2020 38,252              
Stock issued from equity plans   779           779
Stock issued from equity plans (in shares) 73              
Stock-based compensation   2,837           2,837
Other comprehensive income (loss)     (344)         (344)
Net income         29,144 (16)   29,128
Ending Balance at Jun. 30, 2020 $ 38 102,094 (9,148)   624,829 545   718,358
Ending Balance (in shares) at Jun. 30, 2020 38,325              
Beginning Balance at Dec. 31, 2020 $ 38 105,009 (2,605)   712,297 601   $ 815,340
Beginning Balance (in shares) at Dec. 31, 2020 38,293             38,293
Stock issued from equity plans   (4,645)           $ (4,645)
Stock issued from equity plans (in shares) 93              
Stock-based compensation   5,701           5,701
Dividend payments         (3,854)     (3,854)
Other comprehensive income (loss)     (4,968)         (4,968)
Net income         38,668 33   38,701
Ending Balance at Mar. 31, 2021 $ 38 106,065 (7,573)   747,111 634   846,275
Ending Balance (in shares) at Mar. 31, 2021 38,386              
Beginning Balance at Dec. 31, 2020 $ 38 105,009 (2,605)   712,297 601   $ 815,340
Beginning Balance (in shares) at Dec. 31, 2020 38,293             38,293
Stock buyback               $ (6,503)
Net income               74,141
Ending Balance at Jun. 30, 2021 $ 38 103,795 (6,538)   778,646 665   $ 876,606
Ending Balance (in shares) at Jun. 30, 2021 38,381             38,381
Beginning Balance at Mar. 31, 2021 $ 38 106,065 (7,573)   747,111 634   $ 846,275
Beginning Balance (in shares) at Mar. 31, 2021 38,386              
Stock issued from equity plans   956           956
Stock issued from equity plans (in shares) 67              
Stock-based compensation   3,277           3,277
Stock buyback   (6,503)           (6,503)
Stock buyback (in shares) (72)              
Dividend payments         (3,874)     (3,874)
Other comprehensive income (loss)     1,035         1,035
Net income         35,409 31   35,440
Ending Balance at Jun. 30, 2021 $ 38 $ 103,795 $ (6,538)   $ 778,646 $ 665   $ 876,606
Ending Balance (in shares) at Jun. 30, 2021 38,381             38,381