Joint Ventures (Summarized Information for Joint Ventures) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]
Net sales	$ 12,227	$ 11,992	$ 32,708	$ 35,842
Gross profit	3,201	3,361	8,087	10,663
Net income	$ 1,754	$ 1,905	$ 4,374	$ 5,984