Unconsolidated Affiliated Companies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Ownership threshold, investment as equity method	50.00%
Equity in earnings of affiliated companies	$ 2.9	[1]	$ 1.4	[1]	$ 0.9	[1]
Unconsolidated affiliated companies	$ 18.6	[1]	$ 17.3	[1]
PDTL Trading Company Ltd. [Member]
Ownership percentage in affiliated companies, less than	49.00%
Colada Continua Chilean, S.A. [Member]
Ownership percentage in affiliated companies, less than	41.00%
Minuet Realty Corp. [Member]
Ownership percentage in affiliated companies, less than	40.00%
Nostag GmbH & Co. KG [Member]
Ownership percentage in affiliated companies, less than	33.00%
Pakistan Cables Limited [Member]
Ownership percentage in affiliated companies, less than	24.60%
Keystone Electric Wire & Cable Co., Ltd. [Member]
Ownership percentage in affiliated companies, less than	20.00%
Thai Copper Rod Company Ltd. [Member]
Ownership percentage in affiliated companies, less than	18.00%

[1] See Note 22 -Restatement of Consolidated Financial Statements