Goodwill And Other Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2009	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill [Line Items]
Goodwill impairment charge	$ 30,600,000
Goodwill impairment charge, after taxes	30,600,000
Goodwill		169,687,000	172,788,000	176,620,000	165,372,000
Film Products
Goodwill [Line Items]
Goodwill		156,000,000
Aluminum Extrusions
Goodwill [Line Items]
Goodwill		$ 13,700,000