Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 28, 2019	Dec. 29, 2018
Segment Reporting Information [Line Items]
Net External Sales	$ 177,019	$ 171,453	$ 541,618	$ 520,354
Gross Margin	70,711	68,127	212,519	203,685
Selling, General & Administrative Expenses	30,719	29,142	91,580	88,043
Operating Income	37,466	19,838	113,265	91,720
Intersegment Sales	17,170	14,911	50,908	45,998
Plain [Member]
Segment Reporting Information [Line Items]
Net External Sales	86,876	79,306	264,372	235,311
Gross Margin	35,016	31,921	104,830	93,404
Selling, General & Administrative Expenses	6,726	6,475	19,774	18,997
Operating Income	27,503	25,044	82,583	72,443
Intersegment Sales	1,638	1,285	4,994	4,525
Roller [Member]
Segment Reporting Information [Line Items]
Net External Sales	31,829	34,841	101,273	107,711
Gross Margin	14,048	14,631	41,968	45,858
Selling, General & Administrative Expenses	1,632	1,559	4,893	4,739
Operating Income	12,427	13,049	36,731	41,083
Intersegment Sales	3,498	3,602	10,722	10,771
Ball [Member]
Segment Reporting Information [Line Items]
Net External Sales	18,475	16,720	53,609	52,832
Gross Margin	8,184	6,861	23,486	21,548
Selling, General & Administrative Expenses	1,598	1,656	4,805	4,867
Operating Income	6,579	5,164	18,623	16,532
Intersegment Sales	585	740	2,170	2,302
Engineered Products [Member]
Segment Reporting Information [Line Items]
Net External Sales	39,839	40,586	122,364	124,500
Gross Margin	13,463	14,714	42,235	42,875
Selling, General & Administrative Expenses	4,410	4,795	13,147	15,231
Operating Income	8,274	(8,082)	25,699	8,315
Intersegment Sales	11,449	9,284	33,022	28,400
Corporate [Member]
Segment Reporting Information [Line Items]
Selling, General & Administrative Expenses	16,353	14,657	48,961	44,209
Operating Income	$ (17,317)	$ (15,337)	$ (50,371)	$ (46,653)