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Stock Compensation - Restricted Stock and Performance Share Grants - Compensation Costs (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock compensation costs $ 3,629trc_ShareBasedCompensationArrangementByShareBasedPaymentAwardCompensationCosts $ 1,223trc_ShareBasedCompensationArrangementByShareBasedPaymentAwardCompensationCosts $ 5,832trc_ShareBasedCompensationArrangementByShareBasedPaymentAwardCompensationCosts
1998 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock compensation costs, expensed 2,645us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_PlanNameAxis
= trc_StockIncentivePlan1998Member		 161us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_PlanNameAxis
= trc_StockIncentivePlan1998Member		 5,054us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_PlanNameAxis
= trc_StockIncentivePlan1998Member
Stock compensation costs, capitalized 95us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
/ us-gaap_PlanNameAxis
= trc_StockIncentivePlan1998Member		 294us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
/ us-gaap_PlanNameAxis
= trc_StockIncentivePlan1998Member		 392us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
/ us-gaap_PlanNameAxis
= trc_StockIncentivePlan1998Member
Stock compensation costs 2,740trc_ShareBasedCompensationArrangementByShareBasedPaymentAwardCompensationCosts
/ us-gaap_PlanNameAxis
= trc_StockIncentivePlan1998Member		 455trc_ShareBasedCompensationArrangementByShareBasedPaymentAwardCompensationCosts
/ us-gaap_PlanNameAxis
= trc_StockIncentivePlan1998Member		 5,446trc_ShareBasedCompensationArrangementByShareBasedPaymentAwardCompensationCosts
/ us-gaap_PlanNameAxis
= trc_StockIncentivePlan1998Member
NDSI Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock compensation costs, expensed $ 889us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_PlanNameAxis
= trc_NonEmployeeDirectorStockIncentivePlanMember		 $ 768us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_PlanNameAxis
= trc_NonEmployeeDirectorStockIncentivePlanMember		 $ 386us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_PlanNameAxis
= trc_NonEmployeeDirectorStockIncentivePlanMember