Summary of Business Organization, Operations and Significant Accounting Policies (Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012	Jan. 01, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 2,670
Other comprehensive income (loss), net of tax	(7,199)		624	(8,253)
Ending balance	(4,429)		2,670
Foreign currency translation adjustments, net of tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	5,755	[1]
Other comprehensive income (loss), net of tax	(8,196)	[1]
Ending balance	(2,441)	[1]
Unrealized (loss)/gain on derivatives, net of tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(457)
Other comprehensive income (loss), net of tax	183
Ending balance	(274)
Pension adjustments, net of tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(2,628)
Other comprehensive income (loss), net of tax	914
Ending balance	(1,714)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), net of tax	$ (7,099)		$ 740	$ (8,141)

[1] The foreign currency translation adjustment, net of tax, related to noncontrolling interests was not significant for the year ended December 31, 2013 or December 31, 2012