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Interest Rate Risk Management
12 Months Ended
Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Interest Rate Risk Management
INTEREST RATE RISK MANAGEMENT
At December 31, 2012, the Company had no outstanding interest rate swap agreements. However, a joint venture of the Company, TA/Petro, had an interest rate swap agreement with respect to its long-term debt to manage interest rate risk by converting floating interest rate debt to fixed-rate debt. This swap agreement matured in August 2012. TA/Petro accounted for the swap as a cash flow hedge with changes in the fair value of the swap recorded in other comprehensive income. The Company accounts for its share of the change in the interest rate swap in other comprehensive income and investments in unconsolidated joint ventures.