Acquisition (Schedule Of Purchase Price Allocation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Combinations [Line Items]
Purchase price, net of cash acquired		$ 229,582
Goodwill	$ 191,616	199,290	$ 45,970	$ 44,691
Business Acquisition Pro Forma Information [Abstract]
Net sales		2,622,246	2,896,638
Net income		95,595	$ 80,025
Secure [Member]
Business Combinations [Line Items]
Purchase price paid	219,800
Secure [Member] | As Initially Reported [Member]
Business Combinations [Line Items]
Purchase price paid		230,504
Cash acquired		(922)
Purchase price, net of cash acquired		229,582
Cash		922
Accounts receivable		12,839
Inventories		16,020
Other current assets		1,569
Property, plant and equipment		2,048
Other assets		97
Trade names and trademarks intangible		7,800
Technology licenses intangible		15,500
Customer relationships intangible		67,100
Current liabilities		(16,714)
Long-term debt		(24)
Other long-term liabilities		(800)
Deferred income taxes		(29,173)
Total identifiable net assets		77,184
Goodwill		153,320
Net assets acquired		$ 230,504
Secure [Member] | Measurement Period Adjustment [Member]
Business Combinations [Line Items]
Purchase price paid	(10,750)
Cash acquired	0
Purchase price, net of cash acquired	(10,750)
Cash	0
Accounts receivable	(318)
Inventories	(2,536)
Other current assets	0
Property, plant and equipment	0
Other assets	0
Trade names and trademarks intangible	0
Technology licenses intangible	0
Customer relationships intangible	0
Current liabilities	(222)
Long-term debt	0
Other long-term liabilities	0
Deferred income taxes	0
Total identifiable net assets	(3,076)
Goodwill	(7,674)
Net assets acquired	(10,750)
Secure [Member] | As Adjusted [Member}
Business Combinations [Line Items]
Purchase price paid	219,754
Cash acquired	(922)
Purchase price, net of cash acquired	218,832
Integration and Acquisition-related costs for 2016	132
Cash	922
Accounts receivable	12,521
Inventories	13,484
Other current assets	1,569
Property, plant and equipment	2,048
Other assets	97
Trade names and trademarks intangible	7,800
Technology licenses intangible	15,500
Customer relationships intangible	67,100
Current liabilities	(16,936)
Long-term debt	(24)
Other long-term liabilities	(800)
Deferred income taxes	(29,173)
Total identifiable net assets	74,108
Goodwill	145,646
Net assets acquired	$ 219,754