Restructuring Charge (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 29, 2015
Restructuring Charge [Abstract]
Restructuring charge, pre-tax	$ 0.6tess_RestructuringCostPreTaxCharge

Amount of expenses accruing before income tax paid.

No definition available.

Name:	tess_RestructuringCostPreTaxCharge
Namespace Prefix:	tess_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration