Basis of Presentation - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Jun. 29, 2012
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Revenue reduction attributable to prior period transactions	$ 3.2
Impact on Earnings per Share due to revenue reduction attributable to prior period transactions	$ 0.01

Impact on Earnings per Share due to revenue reduction attributable to prior period transactions.

No definition available.

Name:	tlab_ImpactOnEarningsPerShareDueToTransactionsRelatedToPriorPeriods
Namespace Prefix:	tlab_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration