Corporate Organization and Summary of Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Income taxes [Abstract]
Undistributed earnings of foreign subsidiaries to be permanently reinvested	$ 88.5
Product warranties [Abstract]
Product warranty term, minimum	1Y
Product warranty term, maximum	5Y

The cumulative amount of undistributed earnings of foreign subsidiaries that the company intends to permanently reinvest and upon which no domestic income taxes have been provided as of the balance sheet date.

No definition available.

Name:	lufk_UndistributedEarningsOfForeignSubsidiariesToBePermanentlyReinvested
Namespace Prefix:	lufk_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant