Consolidated Financial Statements Consolidated Financial Statements (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2012
Retrospective Correction of an Error in Prior Year Income, Net of Tax	$ 1,213	$ 3,638
Impact of Retrospective Correction of an Error on Earnings Per Share, Diluted	$ 0.02	$ 0.05
Impact of Retrospective Correction of an Error on Opening Retained Earnings, Net of Tax			18,489
Cost of Goods, Product Line [Member]
Retrospective Correction of an Error in Prior Year Income, Gross	$ 1,633	$ 4,899