Unaudited: Quarterly Results of Operations, Common Stock Price and Dividends (Details) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2025 USD ($) Stockholder $ / shares	Sep. 30, 2025 USD ($) $ / shares	Jun. 30, 2025 USD ($) $ / shares	Mar. 31, 2025 USD ($) $ / shares	Dec. 31, 2024 USD ($) Stockholder $ / shares	Sep. 30, 2024 USD ($) $ / shares	Jun. 30, 2024 USD ($) $ / shares	Mar. 31, 2024 USD ($) $ / shares	Dec. 31, 2025 USD ($) Stockholder $ / shares	Dec. 31, 2024 USD ($) Stockholder $ / shares	Dec. 31, 2023 USD ($) $ / shares
Number of shareholders | Stockholder	549				562				549	562
Net sales | $	$ 220,706	$ 235,651	$ 238,095	$ 222,211	$ 205,182	$ 208,438	$ 216,658	$ 196,280	$ 916,663	$ 826,558	$ 703,592
Gross margin | $	92,987	95,836	97,810	95,437	82,760	83,878	85,368	77,178	382,070	329,184	276,438
Net Income (Loss) | $	$ 33,575	$ 35,077	$ 34,584	$ 38,398	$ 30,717	$ 32,038	$ 33,056	$ 29,131	$ 141,634	$ 124,942	$ 92,598
Earnings per share:
Basic	$ 1.14	$ 1.19	$ 1.18	$ 1.31	$ 1.05	$ 1.09	$ 1.13	$ 0.99	$ 4.82	$ 4.26	$ 3.16
Diluted	1.14	1.19	1.17	1.30	1.04	1.08	1.12	0.99	4.79	4.23	3.14
Dividends declared	0.40	0.40	0.34	0.34	0.34	0.34	0.27	0.27	1.48	1.22	$ 0.99
Stock price	174.41	178.58	244.95	190.25	212.12	218.41	186.35	161.81	174.41	212.12
High
Earnings per share:
Stock price	187.87	245.81	254.17	221.51	239.11	220.25	202.81	164.81	187.87	239.11
Low
Earnings per share:
Stock price	$ 168.16	$ 172.32	$ 170.72	$ 189.49	$ 193.00	$ 181.00	$ 151.18	$ 139.50	$ 168.16	$ 193.00