Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2012	Jun. 29, 2012 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 1 [Member]	Jun. 29, 2012 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member]	Jun. 29, 2012 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 29, 2012 Fair Value, Measurements, Recurring [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Jun. 29, 2012 Portion at Fair Value, Fair Value Disclosure [Member]	Dec. 31, 2011 Portion at Fair Value, Fair Value Disclosure [Member]	Jun. 29, 2012 Carrying (Reported) Amount, Fair Value Disclosure [Member]	Dec. 31, 2011 Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt										$ 247,313	$ 218,048	$ 226,780	$ 203,522
Derivative instruments		0	0	1,289	3,518	0	0	1,289	3,518
Total Assets		0	0	1,289	3,518	0	0	1,289	3,518
Contingent consideration		0	0	0	0	(3,075)	(3,355)	3,075	(3,355)
Total Liabilities		0	0	0	0	3,075	3,355	(3,075)	3,355
Reduction of liability released to income	(483)
Accretion of implicit interest	$ 203