Income Taxes (Details 6) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Jan. 01, 2012	Jan. 02, 2011
Reconciliation of unrecognized tax benefits
Balance at Beginning of Period	$ 6,528	$ 9,062	$ 5,947
Additions based on tax positions related to the current year	2,437	13	3,251
Additions for tax positions of prior years	13,356	43	0
Additions from current year acquisitions	0	3,848	2,928
Reductions for tax positions of prior years	0	(3,237)	(2,891)
Reductions as result of a lapse of applicable statutes of limitations	(592)	(845)	0
Settlements	(3,230)	(2,356)	(173)
Balance at End of Period	$ 18,499	$ 6,528	$ 9,062