Property and Business Interruption Insurance Claims and Recoveries (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Business Interruption Loss [Line Items]
Total insurance recoveries	$ 2,058		$ 2,308
Insurance recoveries	1,293	0	1,223	0
Interruption of business
Business Interruption Loss [Line Items]
Total insurance recoveries	765		925
Insurance recoveries	647		597
Interruption of business | Cost of Sales
Business Interruption Loss [Line Items]
Less: out-of-pocket expenses related to interruption of business in Cost of Sales	118		328
Property damage from fire
Business Interruption Loss [Line Items]
Total insurance recoveries	1,293		1,383
Insurance recoveries	1,293		1,223
Property damage from fire | Insurance Recoveries
Business Interruption Loss [Line Items]
Less: Net book value of property loss in Insurance Recoveries	$ 0		$ 160