Segments and Geographic Areas (Schedule of Net Sales by Major Customer) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue, Major Customer [Line Items]
Net sales	$ 563,600	$ 654,100	$ 615,200
Unites States [Member]
Revenue, Major Customer [Line Items]
Net sales	150,000	167,000	138,000
United Kingdom [Member]
Revenue, Major Customer [Line Items]
Net sales	46,000	48,000	45,000
France [Member]
Revenue, Major Customer [Line Items]
Net sales	$ 47,000	$ 46,000	$ 48,000