Pension Plans (Details) - Multi-employer defined benefit pension plan $ in Thousands	6 Months Ended
Jun. 30, 2017 USD ($)
Pension Plans
Estimated liability upon withdrawal from plan	$ 72,700
Insolvent period	13 years

Estimated amount of the obligation that would be recognized due to withdrawing from a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

No definition available.

Name:	tr_MultiemployerPlansEstimatedLiabilityUponWithdrawalPlanObligation
Namespace Prefix:	tr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant