Exit Activity Costs and Asset Impairments (Narrative) (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) facility	Dec. 31, 2014 USD ($) facility	Dec. 31, 2013 USD ($)
Restructuring and Related Activities [Abstract]
Restructuring impairment charges	$ 8,504,000	$ 208,000	$ 1,616,000
Exit activity costs	$ 1,418,000	$ 2,126,000	$ 1,018,000
Number of consolidated facilities to be closed | facility	4	2
Sale leaseback gain	$ 6,799,000	$ 663,000
Total asset impairment charges (recovery) related to restructuring activities		$ 208,000