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Derivative Financial Instruments
3 Months Ended
Mar. 31, 2013
Derivative Financial Instruments [Abstract]  
Derivative Financial Instruments
Note 5.    Derivative Financial Instruments

The Company's zero cost interest rate collar with Wells Fargo Bank, National Association terminated on March 4, 2013, the stated maturity date, by its terms. There were no balances outstanding under the zero cost interest rate collar at that time.