Segment and Geographic Information Reconciliation of Income From Segements to Consolidation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 26, 2014	Sep. 27, 2013	Sep. 26, 2014 segment	Sep. 27, 2013	Dec. 31, 2013
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Number of Operating Segments			2
Net sales	$ 462,332	$ 423,663	$ 1,335,353	$ 1,243,463
Operating income	25,956	31,421	74,632	76,205
Net gain (loss) on sale of assets	(47)	0	(215)	(100)
Interest expense, net	3,444	3,113	10,060	9,344
Other expense (income), net	252	(21)	541	368
Earnings from continuing operations before income taxes	22,260	28,329	64,031	66,493
Income tax expense	7,387	9,634	21,507	22,752
Earnings from continuing operations	14,873	18,695	42,524	43,741
Assets	1,226,302		1,226,302		1,140,631
Distribution [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	308,571	272,951	877,627	800,352
Operating income	13,272	14,675	39,826	32,974
Assets	573,680		573,680		480,117
Aerospace [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	153,761	150,712	457,726	443,111
Operating income	26,813	27,638	75,515	77,227
Assets	560,059		560,059		557,831
Unallocated Amount to Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net gain (loss) on sale of assets	(47)	0	(215)	(100)
Corporate Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	(14,082)	(10,892)	(40,494)	(33,896)
Corporate, Non-Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Assets	$ 92,563		$ 92,563		$ 102,683