Goodwill And Other Intangible Assets (Schedule Of Goodwill And Other Intangibles) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill And Other Intangible Assets [Line Items]
Goodwill, Impairment Loss		$ 44,465	$ 0	$ 0
Goodwill		117,839	169,687	172,788
Identifiable intangible assets:
Total carrying value of other intangibles		35,233	45,442
Intangible Assets, Net (Including Goodwill)		153,072	215,129
Customer relationships
Identifiable intangible assets:
Other identifiable intangibles		15,620	21,620
Finite-Lived Intangible Assets, Gross		23,766	29,117
Proprietary technology
Identifiable intangible assets:
Other identifiable intangibles		9,037	11,824
Finite-Lived Intangible Assets, Gross		16,738	18,228
Noncompete agreements
Identifiable intangible assets:
Finite-Lived Intangible Assets, Gross		4,154	4,154
Trade names
Identifiable intangible assets:
Trade names		$ 10,576	11,998
Minimum | Customer relationships
Identifiable intangible assets:
Identifiable Intangible Asset, Useful Life (Yrs)		10 years
Maximum | Customer relationships
Identifiable intangible assets:
Identifiable Intangible Asset, Useful Life (Yrs)		12 years
Maximum | Proprietary technology
Identifiable intangible assets:
Identifiable Intangible Asset, Useful Life (Yrs)		15 years
Flexible Packaging Films [Member] [Domain]
Goodwill And Other Intangible Assets [Line Items]
Goodwill, Impairment Loss	$ 44,465	$ 44,465	0	0
Goodwill		$ 0	$ 51,831	$ 54,931
Identifiable intangible assets:
Goodwill, Impairment Loss, Net of Tax	$ 44,500