Schedule of Impact of Topic 606 on Financial Statements (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Sep. 28, 2018		Sep. 29, 2017	Jun. 30, 2018		Jun. 29, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		$ 377,177
Cost of revenues		(336,901)		$ (316,981)
Gross profit		40,276		40,332
Net income		$ 27,850		$ 21,033
Earnings per share
Basic		$ 0.76		$ 0.56
Diluted		$ 0.75		$ 0.55
Assets
Contract assets		$ 10,157			$ 9,877
Inventory, net		278,397			249,015		$ 257,687
Liabilities and Shareholders' Equity
Retained earnings		661,478			633,628		632,423
ASU 2014-09 | Adjustment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	[1]	(280)
Cost of revenues	[2]	249
Gross profit	[3]	(31)
Net income	[3]	$ (31)
Earnings per share
Basic		$ 0.00
Diluted		$ 0.00
Assets
Contract assets	[4]	$ (10,157)			9,877
Inventory, net		8,921	[5]		(8,672)	[6]
Liabilities and Shareholders' Equity
Retained earnings		(1,236)	[7]		$ 1,205	[8]
ASU 2014-09 | Balance without ASC 606 Adoption
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		376,897
Cost of revenues		(336,652)
Gross profit		40,245
Net income		$ 27,819
Earnings per share
Basic		$ 0.76
Diluted		$ 0.75
Assets
Inventory, net		$ 287,318					257,687
Liabilities and Shareholders' Equity
Retained earnings		$ 660,242					$ 632,423

[1] Adjustment relates to certain manufacturing contracts with vendor managed inventory arrangements for which revenue was recognized at shipping.

[2] Adjustment relates to costs associated with revenue recognized.

[3] Adjustment relates to net impact on income upon adoption of ASC 606.

[4] Majority of adjustment relates to certain manufacturing contracts with vendor managed inventory arrangements for which revenue was recognized on shipment.

[5] Adjustment relates to reduction of finished goods inventory for vendor managed inventory.

[6] Adjustment relates to reduction of finished goods inventory for certain vendor managed inventory arrangements.

[7] Adjustment relates to cumulative effect adjustment upon adoption of ASC

[8] Adjustment relates to cumulative effect adjustment upon adoption of ASC 606.