Acquisition (Schedule Of Purchase Price Allocation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Combinations [Line Items]
Purchase price, net of cash acquired	$ 0		$ 229,582
Goodwill	$ 191,616	$ 191,616	199,290	$ 45,970
Business Acquisition Pro Forma Information [Abstract]
Net sales			2,622,246
Net income			95,595
Secure [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
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)