Asset Impairment Charges (Details) (USD $)	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014
Segment Reporting Information [Line Items]
Asset impairment charges	$ 1,179,000	$ 0	$ 0
Joining Materials
Segment Reporting Information [Line Items]
Asset impairment charges				600,000
Kasco
Segment Reporting Information [Line Items]
Impairment of Real Estate				$ 600,000