Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Net Sales	$ 299,236	$ 280,086	$ 789,308	$ 761,459
Cost of sales	222,658	209,807	605,272	572,359
Gross profit	76,578	70,279	184,036	189,100
Selling, general, and administrative expense	45,158	40,875	115,444	113,579
Income from operations	31,420	29,404	68,592	75,521
Interest expense	17	2,906	2,297	9,305
Other expense (income)	84	522	660	(50)
Income before taxes	31,319	25,976	65,635	66,266
Provision for income taxes	6,843	6,473	14,901	15,574
Net income	$ 24,476	$ 19,503	$ 50,734	$ 50,692
Net earnings per share – Basic:
Income from continuing operations - Net earnings per share - Basic (in USD per share)	$ 0.75	$ 0.61	$ 1.57	$ 1.59
Income from continuing operations - Net earnings per share - Diluted (in USD per share)	$ 0.75	$ 0.60	$ 1.55	$ 1.56
Weighted Average Number of Shares Outstanding
Weighted average basic shares outstanding (in shares)	32,470	32,115	32,357	31,922
Weighted average shares outstanding, diluted (in shares)	32,770	32,571	32,677	32,524