Investments TIMWEN (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013 TimWen [Member]		Jul. 01, 2012 TimWen [Member]		Sep. 30, 2008 TimWen [Member] Y
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					6,700		6,545
Amortization of purchase price adjustments (a)					(1,540)	[1]	(1,554)	[1]
Equity in earnings for the period, net of amortization of purchase price adjustment			4,071	4,914	5,160		4,991
Distributions received			(6,026)	(6,694)	(6,026)		(6,694)
Foreign currency translation adjustment included in “Other comprehensive (loss) income, net”	(6,811)	(3,353)	(11,880)	1,389	(4,820)		475
Balance at end of period					83,684	[2]	90,514	[2]
Purchase price adjustment, amortization period									21
Equity Method Investment, Summarized Financial Information, Income Statement
Revenues					19,039		19,283
Income before income taxes and net income					$ 13,400		$ 13,090

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

[2] Included in “Investments.”