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Financial Instruments
6 Months Ended
Jun. 30, 2012
Financial Instruments [Abstract]  
Financial Instruments
(10) Financial Instruments

The carrying amount of notes receivable from related parties with a fixed rate of interest of 6.0% was $2.8 million as of June 30, 2012, compared with a fair value of $3.2 million based on current market interest rates. The carrying amount of notes receivable from related parties was $2.9 million as of December 31, 2011, compared with a fair value of $3.4 million.

The carrying amount of long-term debt, including the current installments, was $120.2 million as of June 30, 2012 and approximated fair value due to the variable interest rate, which is based on current market rates. The carrying amount of long-term debt was $126.7 million as of December 31, 2011 and approximated fair value due to the variable interest rate.