Tax benefit associated with any equity-based compensation plan other than an employee stock ownership plan (ESOP). The tax benefit results from the deduction by the entity on its tax return for an award of stock that exceeds the cumulative compensation cost for common stock or preferred stock recognized for financial reporting. Includes any resulting tax benefit that exceeds the previously recognized deferred tax asset (excess tax benefits).

No definition available.

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Namespace Prefix:	trr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Federal and State Income Taxes - Tax Credit Carryforward (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2014 Expiring in 2033 Domestic Tax Authority	Jun. 30, 2014 Expiring in 2033 State and Local Jurisdiction	Jun. 30, 2013 Expiring in 2032 Domestic Tax Authority	Jun. 30, 2013 Expiring in 2032 State and Local Jurisdiction
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Operating Loss Carryforwards		$ 0	$ 21,047	$ 7,689	$ 25,771
Deferred Tax Assets, Exercise of Non-Qualified Stock Options	$ 3,318