Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 01, 2017	Jul. 02, 2016
Segment Reporting Information [Line Items]
Net External Sales	$ 163,897	$ 154,579
Gross Margin	61,909	57,251
Selling, General & Administrative Expenses	27,778	25,796
Operating Income	31,800	29,221
Geographic External Sales	163,897	154,579
Intersegment Sales	13,266	13,229
Plain [Member]
Segment Reporting Information [Line Items]
Net External Sales	72,653	70,450
Gross Margin	28,376	26,554
Selling, General & Administrative Expenses	6,449	5,990
Operating Income	21,161	19,763
Intersegment Sales	1,156	1,213
Roller [Member]
Segment Reporting Information [Line Items]
Net External Sales	31,413	27,834
Gross Margin	12,755	12,289
Selling, General & Administrative Expenses	1,571	1,441
Operating Income	11,183	10,788
Intersegment Sales	3,409	3,984
Ball [Member]
Segment Reporting Information [Line Items]
Net External Sales	15,780	13,710
Gross Margin	6,175	5,304
Selling, General & Administrative Expenses	1,615	1,462
Operating Income	4,495	3,714
Intersegment Sales	528	515
Engineered Products [Member]
Segment Reporting Information [Line Items]
Net External Sales	44,051	42,585
Gross Margin	14,603	13,104
Selling, General & Administrative Expenses	5,277	4,893
Operating Income	8,217	6,947
Intersegment Sales	8,173	7,517
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Selling, General & Administrative Expenses	12,866	12,010
Operating Income	(13,256)	(11,991)
Domestic Tax Authority [Member]
Segment Reporting Information [Line Items]
Geographic External Sales	143,026	135,177
Foreign Tax Authority [Member]
Segment Reporting Information [Line Items]
Geographic External Sales	$ 20,871	$ 19,402