Reconciliation of Reported Effective Income Tax Rate to Domestic Federal Income Tax Rate (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2010
Schedule Of Effective Tax Rates Line Items
State income tax, net of federal benefits	$ 9.4

State income tax benefit related to the reversal of reserves no longer required due to a lapse in the statute of limitations.

No definition available.

Name:	tlab_StateIncomeTaxBenefit
Namespace Prefix:	tlab_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration