Segment Information Segment Information - Revenue by Geographic Area (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 31, 2013	Sep. 27, 2013	Jun. 28, 2013	Mar. 29, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers [Line Items]
Net sales	$ 211,909	$ 239,942	$ 232,990	$ 169,904	$ 196,431	$ 227,835	$ 229,861	$ 172,545	$ 854,745	$ 826,672	$ 837,140
United States
Revenues from External Customers [Line Items]
Net sales									588,593	559,135	564,254
The Netherlands
Revenues from External Customers [Line Items]
Net sales									149,473	155,032	154,153
U.K.
Revenues from External Customers [Line Items]
Net sales									75,529	69,433	72,699
France
Revenues from External Customers [Line Items]
Net sales									32,520	33,748	36,886
Canada
Revenues from External Customers [Line Items]
Net sales									$ 8,630	$ 9,324	$ 9,148