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Consolidated Statement of Changes in Stockholders' Equity - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Treasury Stock [Member]
AOCI Attributable to Parent [Member]
Total
Balance at Dec. 31, 2020 $ 341 $ 261,533 $ 442,789 $ (69,400) $ (16,266) $ 618,997
Net income     19,039     19,039
Award of common shares released from Employee Benefit Trust   74       74
Vesting of restricted stock unit awards   (5,058) (153) 5,211    
Stock-based compensation expense   3,470       3,470
Repurchase of shares to satisfy tax obligation       (1,290)   (1,290)
Dividends on common stock     (6,652)     (6,652)
Other comprehensive loss         5,563 5,563
Balance at Mar. 31, 2021 341 260,019 455,023 (65,479) (10,703) 639,201
Balance at Dec. 31, 2020 341 261,533 442,789 (69,400) (16,266) 618,997
Net income           63,710
Other comprehensive loss         7,332 7,332
Balance at Sep. 30, 2021 341 262,009 486,418 (71,738) (8,934) 668,096
Balance at Mar. 31, 2021 341 260,019 455,023 (65,479) (10,703) 639,201
Net income     19,258     19,258
Award of common shares released from Employee Benefit Trust   91       91
Vesting of restricted stock unit awards   (221) (8) 229    
Stock-based compensation expense   1,069       1,069
Repurchase of shares to satisfy tax obligation       (85)   (85)
Dividends on common stock     (6,653)     (6,653)
Other comprehensive loss         2,286 2,286
Balance at Jun. 30, 2021 341 260,958 467,620 (65,335) (8,417) 655,167
Net income     25,413     25,413
Award of common shares released from Employee Benefit Trust   74       74
Purchase of treasury shares       (6,403)   (6,403)
Stock-based compensation expense   977       977
Dividends on common stock     (6,615)     (6,615)
Other comprehensive loss         (517) (517)
Balance at Sep. 30, 2021 341 262,009 486,418 (71,738) (8,934) 668,096
Balance at Dec. 31, 2021 341 263,375 497,889 (75,293) (6,684) 679,628
Net income     18,219     18,219
Award of common shares released from Employee Benefit Trust   287       287
Vesting of restricted stock unit awards   (6,019) (285) 6,304    
Purchase of treasury shares       (8,469)   (8,469)
Stock-based compensation expense   4,194       4,194
Repurchase of shares to satisfy tax obligation       (2,376)   (2,376)
Dividends on common stock     (6,850)     (6,850)
Other comprehensive loss         (8,820) (8,820)
Balance at Mar. 31, 2022 341 261,837 508,973 (79,834) (15,504) 675,813
Balance at Dec. 31, 2021 341 263,375 497,889 (75,293) (6,684) 679,628
Net income           66,696
Other comprehensive loss         (39,610) (39,610)
Balance at Sep. 30, 2022 341 263,755 543,894 (90,977) (46,294) 670,719
Balance at Mar. 31, 2022 341 261,837 508,973 (79,834) (15,504) 675,813
Net income     25,035     25,035
Vesting of restricted stock unit awards   (38) (5) 43    
Purchase of treasury shares       (8,534)   (8,534)
Stock-based compensation expense   1,061       1,061
Repurchase of shares to satisfy tax obligation       (17)   (17)
Dividends on common stock     (6,786)     (6,786)
Other comprehensive loss         (15,760) (15,760)
Balance at Jun. 30, 2022 341 262,860 527,217 (88,342) (31,264) 670,812
Net income     23,442     23,442
Vesting of restricted stock unit awards   (80) (6) 86    
Purchase of treasury shares       (2,685)   (2,685)
Stock-based compensation expense   975       975
Repurchase of shares to satisfy tax obligation       (36)   (36)
Dividends on common stock     (6,759)     (6,759)
Other comprehensive loss         (15,030) (15,030)
Balance at Sep. 30, 2022 $ 341 $ 263,755 $ 543,894 $ (90,977) $ (46,294) $ 670,719