Discontinued Operations (Schedule of Operating Results) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Discontinued Operations [Abstract]
Net sales	$ 19,774	$ 211,551	$ 171,469
Income from operations of discontinued business before tax	4,776	24,101	16,073
Gain on disposition of discontinued operations	92,296
Income tax expense	$ 25,252	$ 10,429	$ 5,860