Compensation Cost for Performance Share Units (Details) (Performance Shares [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total expense before income taxes	$ 873
Income tax benefit	(280)
Total expense after income taxes	593
Cost of Sales [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total expense before income taxes	0
Selling, General And Administrative Expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total expense before income taxes	$ 873