Significant Accounting Policies Update - Effects of Changes (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Jan. 01, 2018	Mar. 30, 2018	Mar. 31, 2017	Mar. 30, 2018	Dec. 31, 2017
Assets
Accounts receivable, net	$ 284,209	$ 290,564		$ 290,564	$ 313,451
Contract assets	82,699	108,114		108,114	0
Contract costs, current portion	3,022	3,271		3,271	0
Inventories	293,763	296,622		296,622	367,437
Other current assets	27,221	33,035		33,035	27,188
Deferred income taxes	31,773	28,819		28,819	27,603
Contract costs, noncurrent portion	7,852	12,630		12,630	0
Liabilities
Accounts payable – trade	128,659	139,159		139,159	127,591
Contract liabilities, current portion	10,705	5,670		5,670	0
Advances on contracts, current portion	0	0		0	8,527
Other current liabilities	51,796	56,245		56,245	52,812
Income taxes payable	3,042	1,257		1,257	1,517
Contract liabilities, noncurrent portion	689	81,708		81,708	0
Advances on contracts, noncurrent portion		0		0
Equity
Retained earnings	578,293	586,778		586,778	587,877
Net sales		463,327	$ 435,941
Cost of sales		329,220	311,595
Gross profit		134,107	124,346
Selling, general and administrative expenses		111,753	110,877
Restructuring costs		1,693	0	4,400
Net gain on sale of assets		(63)	(20)
Operating income		20,724	13,489
Interest expense, net		5,352	4,160
Other expense (income), net		(342)	(159)
Non-service pension and post retirement benefit cost (income)		(3,029)	(719)
Earnings before income taxes		18,743	10,207
Income tax expense		4,677	3,916
Net earnings		14,066	6,291
Corporate
Equity
Operating income		(13,835)	(13,977)
Distribution | Operating segments
Equity
Net sales		283,932	271,618
Operating income		11,834	11,416
Aerospace
Equity
Net sales		1,600
Aerospace | Operating segments
Equity
Net sales		179,395	164,323
Operating income		22,662	16,030
As previously reported
Equity
Cost of sales			311,125
Gross profit			124,816
Selling, general and administrative expenses			110,628
Operating income			14,208
Non-service pension and post retirement benefit cost (income)			0
As previously reported | Corporate
Equity
Operating income			(14,095)
As previously reported | Distribution | Operating segments
Equity
Operating income			11,694
As previously reported | Aerospace | Operating segments
Equity
Operating income			16,589
Accounting Standard Update 2017-07 | Adjustments
Equity
Cost of sales			470
Gross profit			(470)
Selling, general and administrative expenses			249
Operating income			(719)
Non-service pension and post retirement benefit cost (income)			(719)
Accounting Standard Update 2017-07 | Adjustments | Corporate
Equity
Operating income			118
Accounting Standard Update 2017-07 | Adjustments | Distribution | Operating segments
Equity
Operating income			(278)
Accounting Standard Update 2017-07 | Adjustments | Aerospace | Operating segments
Equity
Operating income			(559)
Calculated under Revenue Guidance in Effect before Topic 606
Assets
Accounts receivable, net		311,877		311,877	313,451
Contract assets		0		0	0
Contract costs, current portion		0		0	0
Inventories		400,236		400,236	367,437
Other current assets		36,585		36,585	27,188
Deferred income taxes		23,714		23,714	27,603
Contract costs, noncurrent portion		0		0	0
Liabilities
Accounts payable – trade		138,223		138,223	127,591
Contract liabilities, current portion		0		0	0
Advances on contracts, current portion		4,968		4,968	8,527
Other current liabilities		56,637		56,637	52,812
Income taxes payable		330		330	1,517
Contract liabilities, noncurrent portion		0		0	0
Advances on contracts, noncurrent portion		81,019		81,019
Equity
Retained earnings		588,997		588,997	$ 587,877
Net sales		419,826
Cost of sales		295,962
Gross profit		123,864
Selling, general and administrative expenses		111,176
Restructuring costs		1,693
Net gain on sale of assets		(63)
Operating income		11,058
Interest expense, net		5,352
Other expense (income), net		(342)
Non-service pension and post retirement benefit cost (income)		(3,029)
Earnings before income taxes		9,077
Income tax expense		2,376
Net earnings		6,701
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Assets
Accounts receivable, net	(29,242)	21,313		21,313
Contract assets	82,699	(108,114)		(108,114)
Contract costs, current portion	3,022	(3,271)		(3,271)
Inventories	(73,674)	103,614		103,614
Other current assets	33	3,550		3,550
Deferred income taxes	4,170	(5,105)		(5,105)
Contract costs, noncurrent portion	7,852	(12,630)		(12,630)
Liabilities
Accounts payable – trade	1,068	(936)		(936)
Contract liabilities, current portion	10,705	(5,670)		(5,670)
Advances on contracts, current portion	(8,527)	4,968		4,968
Other current liabilities	(1,016)	392		392
Income taxes payable	1,525	(927)		(927)
Contract liabilities, noncurrent portion	689	(81,708)		(81,708)
Advances on contracts, noncurrent portion		81,019		81,019
Equity
Retained earnings	(9,584)	2,219		$ 2,219
Net sales		(43,501)
Cost of sales		(33,258)
Gross profit		(10,243)
Selling, general and administrative expenses		(577)
Restructuring costs		0
Net gain on sale of assets		0
Operating income		(9,666)
Interest expense, net		0
Other expense (income), net		0
Non-service pension and post retirement benefit cost (income)		0
Earnings before income taxes		(9,666)
Income tax expense		(2,301)
Net earnings		$ (7,365)
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09 | Aerospace
Equity
Retained earnings	(32,500)
Net sales	62,300
Gross profit	$ 20,200
Operating income			$ 1,000