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Accounts Receivable - Current Portion of Accounts Receivable (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 26, 2014
Jun. 30, 2014
Accounts Receivable, Net, Current [Abstract]    
Total accounts receivable - gross $ 144,423us-gaap_AccountsReceivableGrossCurrent $ 125,657us-gaap_AccountsReceivableGrossCurrent
Less allowance for doubtful accounts (8,669)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent (8,720)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Accounts Receivable, Net, Current 135,754us-gaap_AccountsReceivableNetCurrent 116,937us-gaap_AccountsReceivableNetCurrent
Accounts Receivable | Billed    
Accounts Receivable, Net, Current [Abstract]    
Total accounts receivable - gross 91,930us-gaap_AccountsReceivableGrossCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_TradeAccountsReceivableMember
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis
= us-gaap_BilledRevenuesMember
69,730us-gaap_AccountsReceivableGrossCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_TradeAccountsReceivableMember
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis
= us-gaap_BilledRevenuesMember
Accounts Receivable | Unbilled    
Accounts Receivable, Net, Current [Abstract]    
Total accounts receivable - gross 47,384us-gaap_AccountsReceivableGrossCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_TradeAccountsReceivableMember
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis
= us-gaap_UnbilledRevenuesMember
50,743us-gaap_AccountsReceivableGrossCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_TradeAccountsReceivableMember
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis
= us-gaap_UnbilledRevenuesMember
Retainage    
Accounts Receivable, Net, Current [Abstract]    
Total accounts receivable - gross $ 5,109us-gaap_AccountsReceivableGrossCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= trr_RetainageRevenuesMember
$ 5,184us-gaap_AccountsReceivableGrossCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= trr_RetainageRevenuesMember