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Unaudited Quarterly Results - Schedule of Unaudited Quarterly Results (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Net sales $ 819,474 $ 711,692 $ 740,576 $ 684,674 $ 858,510 $ 708,555 $ 714,319 $ 690,572 $ 2,956,416 $ 2,971,956 $ 2,785,874
Costs and operating expenses:                      
Cost of sales 318,360 291,407 301,076 284,380 348,190 307,101 307,206 285,685 1,195,223 1,248,182  
Selling and administrative expenses 180,357 186,748 186,953 181,956 174,257 164,417 161,877 157,475 736,014 658,026 626,968
Research and development expenses 44,386 41,995 45,873 42,691 48,277 43,435 44,006 40,472 174,945 176,190 168,358
Purchased intangibles amortization 12,148 12,116 6,815 1,479 1,503 1,592 1,598 1,673 32,558 6,366 7,143
Acquired in-process research and development               9,797 0 9,797  
Total costs and operating expenses 555,251 532,266 540,717 510,506 572,227 516,545 514,687 495,102 2,138,740 2,098,561 1,964,167
Operating income 264,223 179,426 199,859 174,168 286,283 192,010 199,632 195,470 817,676 873,395 821,707
Other income (expense), net (557) 328 (352) 1,388 (372) 895 1,535 170 807 2,228  
Interest expense (30,703) (30,442) (23,272) (14,444) (13,899) (12,420) (11,419) (11,059) (98,861) (48,797) (44,938)
Interest income 4,637 3,883 4,040 4,061 3,484 2,896 2,526 2,114 16,621 11,020 12,221
Income before income taxes 237,600 153,195 180,275 165,173 275,496 183,381 192,274 186,695 736,243 837,846 806,193
Provision for income taxes 21,395 18,643 29,721 24,250 48,434 27,383 27,410 26,864 94,009 130,091 113,350
Net income $ 216,205 $ 134,552 $ 150,554 $ 140,923 $ 227,062 $ 155,998 $ 164,864 $ 159,831 $ 642,234 $ 707,755 $ 692,843
Net income per basic common share $ 3.66 $ 2.28 $ 2.56 $ 2.39 $ 3.83 $ 2.61 $ 2.74 $ 2.64 $ 10.87 $ 11.8 $ 11.25
Weighted-average number of basic common shares 59,142 59,093 58,857 59,023 59,329 59,801 60,206 60,580 59,076 59,985 61,575
Net income per diluted common share $ 3.65 $ 2.27 $ 2.55 $ 2.38 $ 3.81 $ 2.6 $ 2.72 $ 2.62 $ 10.84 $ 11.73 $ 11.17
Weighted-average number of diluted common shares and equivalents 59,311 59,225 59,010 59,317 59,644 60,081 60,510 60,952 59,270 60,331 62,028