Business Acquisitions (Schedule of Finite-Lived Intangible Assets Acquired, Future Amortization Expense) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 28, 2012
2013 (remaining)	$ 9,676
2014	32,871
2015	28,781
2016	27,074
2017	25,325
Thereafter	163,786
Business Acquisition, Acquiree - Duarte Business [Member]
2013 (remaining)	2,157
2014	5,588
2015	4,003
2016	3,663
2017	3,663
Thereafter	55,910
Total amount of acquired intangible assets	$ 74,984	$ 79,300