Consolidated Condensed Statements of Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Loss | Treasury Stock |
Balance at period start (shares) at Dec. 31, 2019 | | 31,299 | | | | |
Balance at period start at Dec. 31, 2019 | $ 710,467 | $ 313 | $ 379,324 | $ 470,844 | $ (59,277) | $ (80,737) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Common stock issued under employee plans | (5,040) | | (7,736) | | | 2,696 |
Stock-based compensation | 3,032 | | 3,032 | | | |
Dividends on common stock ($0.20 per share) | (5,703) | | | (5,703) | | |
Comprehensive income (loss): | | | | | | |
Cash flow hedging gain (loss), net | | | | | 2,405 | |
Pension liability, net of income tax | | | | | 535 | |
Foreign currency translation adjustments | | | | | (9,988) | |
Net income (loss) | | | | 5,927 | | |
Comprehensive income (loss) | (1,121) | | | | | |
Balance at period end (shares) at Mar. 31, 2020 | | 31,299 | | | | |
Balance at period end at Mar. 31, 2020 | 701,635 | $ 313 | 374,620 | 471,068 | (66,325) | (78,041) |
Balance at period start (shares) at Dec. 31, 2019 | | 31,299 | | | | |
Balance at period start at Dec. 31, 2019 | 710,467 | $ 313 | 379,324 | 470,844 | (59,277) | (80,737) |
Comprehensive income (loss): | | | | | | |
Cash flow hedging gain (loss), net | (3,050) | | | | | |
Pension liability, net of income tax | 1,605 | | | | | |
Foreign currency translation adjustments | (790) | | | | | |
Net income (loss) | (14,623) | | | | | |
Comprehensive income (loss) | (16,858) | | | | | |
Balance at period end (shares) at Sep. 30, 2020 | | 31,299 | | | | |
Balance at period end at Sep. 30, 2020 | 683,141 | $ 313 | 381,119 | 439,086 | (61,512) | (75,865) |
Balance at period start (shares) at Mar. 31, 2020 | | 31,299 | | | | |
Balance at period start at Mar. 31, 2020 | 701,635 | $ 313 | 374,620 | 471,068 | (66,325) | (78,041) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Common stock issued under employee plans | 133 | | (1,150) | | | 1,283 |
Stock-based compensation | 3,555 | | 3,555 | | | |
Dividends on common stock ($0.20 per share) | (5,712) | | | (5,712) | | |
Comprehensive income (loss): | | | | | | |
Cash flow hedging gain (loss), net | | | | | (2,429) | |
Pension liability, net of income tax | | | | | 535 | |
Foreign currency translation adjustments | | | | | 4,581 | |
Net income (loss) | | | | (27,400) | | |
Comprehensive income (loss) | (24,713) | | | | | |
Balance at period end (shares) at Jun. 30, 2020 | | 31,299 | | | | |
Balance at period end at Jun. 30, 2020 | 674,898 | $ 313 | 377,025 | 437,956 | (63,638) | (76,758) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Common stock issued under employee plans | 1,455 | | 562 | | | 893 |
Stock-based compensation | 3,532 | | 3,532 | | | |
Dividends on common stock ($0.20 per share) | (5,720) | | | (5,720) | | |
Comprehensive income (loss): | | | | | | |
Cash flow hedging gain (loss), net | (3,026) | | | | (3,026) | |
Pension liability, net of income tax | 535 | | | | 535 | |
Foreign currency translation adjustments | 4,617 | | | | 4,617 | |
Net income (loss) | 6,850 | | | 6,850 | | |
Comprehensive income (loss) | 8,976 | | | | | |
Balance at period end (shares) at Sep. 30, 2020 | | 31,299 | | | | |
Balance at period end at Sep. 30, 2020 | 683,141 | $ 313 | 381,119 | 439,086 | (61,512) | (75,865) |
Balance at period start (shares) at Dec. 31, 2020 | | 31,299 | | | | |
Balance at period start at Dec. 31, 2020 | 709,038 | $ 313 | 382,628 | 457,417 | (63,681) | (67,639) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Common stock issued under employee plans | 8,215 | | 2,944 | | | 5,271 |
Stock-based compensation | 3,387 | | 3,387 | | | |
Dividends on common stock ($0.20 per share) | (5,813) | | | (5,813) | | |
Comprehensive income (loss): | | | | | | |
Cash flow hedging gain (loss), net | | | | | 3,926 | |
Pension liability, net of income tax | | | | | 631 | |
Foreign currency translation adjustments | | | | | (3,674) | |
Net income (loss) | | | | 9,860 | | |
Comprehensive income (loss) | 10,743 | | | | | |
Balance at period end (shares) at Mar. 31, 2021 | | 31,299 | | | | |
Balance at period end at Mar. 31, 2021 | 725,570 | $ 313 | 388,959 | 461,464 | (62,798) | (62,368) |
Balance at period start (shares) at Dec. 31, 2020 | | 31,299 | | | | |
Balance at period start at Dec. 31, 2020 | 709,038 | $ 313 | 382,628 | 457,417 | (63,681) | (67,639) |
Comprehensive income (loss): | | | | | | |
Cash flow hedging gain (loss), net | 8,064 | | | | | |
Pension liability, net of income tax | 1,893 | | | | | |
Foreign currency translation adjustments | (5,813) | | | | | |
Net income (loss) | 38,098 | | | | | |
Comprehensive income (loss) | 42,242 | | | | | |
Balance at period end (shares) at Sep. 30, 2021 | | 31,299 | | | | |
Balance at period end at Sep. 30, 2021 | 755,683 | $ 313 | 394,810 | 478,035 | (59,537) | (57,938) |
Balance at period start (shares) at Mar. 31, 2021 | | 31,299 | | | | |
Balance at period start at Mar. 31, 2021 | 725,570 | $ 313 | 388,959 | 461,464 | (62,798) | (62,368) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Common stock issued under employee plans | 2,726 | | 414 | | | 2,312 |
Stock-based compensation | 4,290 | | 4,290 | | | |
Dividends on common stock ($0.20 per share) | (5,830) | | | (5,830) | | |
Comprehensive income (loss): | | | | | | |
Cash flow hedging gain (loss), net | | | | | 1,221 | |
Pension liability, net of income tax | | | | | 631 | |
Foreign currency translation adjustments | | | | | 2,601 | |
Net income (loss) | | | | 13,290 | | |
Comprehensive income (loss) | 17,743 | | | | | |
Balance at period end (shares) at Jun. 30, 2021 | | 31,299 | | | | |
Balance at period end at Jun. 30, 2021 | 744,499 | $ 313 | 393,663 | 468,924 | (58,345) | (60,056) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Common stock issued under employee plans | (1,062) | | (3,180) | | | 2,118 |
Stock-based compensation | 4,327 | | 4,327 | | | |
Dividends on common stock ($0.20 per share) | (5,837) | | | (5,837) | | |
Comprehensive income (loss): | | | | | | |
Cash flow hedging gain (loss), net | 2,917 | | | | 2,917 | |
Pension liability, net of income tax | 631 | | | | 631 | |
Foreign currency translation adjustments | (4,740) | | | | (4,740) | |
Net income (loss) | 14,948 | | | 14,948 | | |
Comprehensive income (loss) | 13,756 | | | | | |
Balance at period end (shares) at Sep. 30, 2021 | | 31,299 | | | | |
Balance at period end at Sep. 30, 2021 | $ 755,683 | $ 313 | $ 394,810 | $ 478,035 | $ (59,537) | $ (57,938) |