Accumulated Other Comprehensive Income (Details Textual) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Apr. 02, 2011
Accumulated Other Comprehensive Income (Textual) [Abstract]
Tax related to actuarial gains (losses) of post retirement medical plans	$ 1,232	$ 1,232	$ 1,232
Tax of loss cash flow hedges	$ 3,577	$ 2,930	$ 1,340

Accumulated other comprehensive income loss cumulative changes in net gain loss from cash flow hedges effect.

No definition available.

Name:	wrc_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffect
Namespace Prefix:	wrc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant