Revenue (Disaggregation of Revenue) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 27, 2020	Jun. 29, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 116,018	$ 111,455	$ 116,722	$ 105,285	$ 105,581	$ 107,954	$ 123,037	$ 127,472	$ 449,480	$ 464,044	$ 446,322
Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenues									441,405	458,256
Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenues									$ 8,075	$ 5,788