Investments TIMWEN (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Apr. 01, 2012		Sep. 30, 2008 Y
Investment in Joint Venture [Roll Forward]
Equity in earnings for the period, net of amortization of purchase price adjustment	$ 1,191		$ 2,134
Distributions received	(2,701)		(3,253)
Foreign currency translation adjustment included in “Other comprehensive (loss) income, net”	(5,069)		4,742
TimWen [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
Investment in Joint Venture [Roll Forward]
Balance at beginning of period	89,370		91,742
Equity in earnings for the period	3,124		2,991
Amortization of purchase price adjustments (a)	(777)	[1]	(780)	[1]
Equity in earnings for the period, net of amortization of purchase price adjustment	2,347		2,211
Distributions received	(2,701)		(3,253)
Foreign currency translation adjustment included in “Other comprehensive (loss) income, net”	(1,877)		2,135
Balance at end of period	87,139	[2]	92,835	[2]
Purchase price adjustment, amortization period					21
Equity Method Investment, Summarized Financial Information, Income Statement
Revenues	9,024		9,129
Income before income taxes and net income	$ 6,247		$ 5,982

[1] Based upon an average original aggregate life of 21 years.

[2] Included in “Investments.”