Employee Benefit Plans (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 31, 2012	Jun. 29, 2012	Jul. 01, 2011	Jun. 29, 2012	Jul. 01, 2011
Defined Benefit Plan Disclosure [Line Items]
Multiemployer pension plan early withdrawal penalty settlement period	20 years
Multiemployer pension withdrawal penalty		$ 0	$ 1,200	$ 0	$ 1,200
U.S. Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost		19	10	38	20
Interest cost		128	128	256	256
Expected return on assets		(144)	(140)	(288)	(280)
Recognized actuarial net loss		62	21	124	21
Total Company defined benefit plan		65	19	130	17
Multiemployer benefit expense		298	317	576	573
Multiemployer pension withdrawal penalty		0	1,200	0	1,200
Net periodic pension cost		363	1,536	706	1,790
UK Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost		0	0	0	0
Interest cost		599	591	1,180	1,185
Expected return on assets		(424)	(459)	(836)	(920)
Recognized actuarial net loss		23	0	46	0
Total Company defined benefit plan		198	132	390	265
Multiemployer benefit expense		0	0	0	0
Multiemployer pension withdrawal penalty		0	0	0	0
Net periodic pension cost		198	132	390	265
Previously reported | U.S. Commercial Products
Defined Benefit Plan Disclosure [Line Items]
Multiemployer pension withdrawal penalty			1,200
Final assessment | U.S. Commercial Products
Defined Benefit Plan Disclosure [Line Items]
Multiemployer pension withdrawal penalty	1,200