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Financial Instruments
12 Months Ended
Dec. 31, 2011
Financial Instruments [Abstract]  
Financial Instruments
15. Financial Instruments

The management of the Company believes that the fair market value of the TRA investment approximates the carrying value of $1.7 million and $5.2 million as of December 31, 2011, and 2010, respectively. The Company accounts for its $1.7 million investment in TRA's preferred stock using the cost method of accounting. TRA is closely held and there is not an efficient market in which buyers and sellers determine the fair value of these shares. The Company periodically assesses the fair value of its investment in TRA through comparative analysis and analysis of TRA's actual and projected financial results. During the fourth quarter ended December 31, 2011, the Company determined that the fair value of its investment in TRA fell below its carrying value and the Company recorded a $3.5 million impairment charge.

Fair values of accounts receivable and accounts payable approximate carrying values due to their short-term nature. Due to the floating rate nature of the Company's revolving obligation under its Credit Facility, the fair value of $53.0 million in outstanding borrowings as of December 31, 2010, approximated its carrying amount. There were no outstanding borrowings as of December 31, 2011 under the Company's Credit Facility.