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Derivative Instruments and Hedging Activities:
 6 Months Ended
Jun. 30, 2012
Derivative Instruments and Hedging Activities:  
Derivative Instruments and Hedging Activities:

5. Derivative Instruments and Hedging Activities:

        The Company recorded other comprehensive income related to the marking-to-market of interest rate agreements of $0 and $1,358 for the three months ended June 30, 2012 and 2011, respectively, and $0 and $6,188 for the six months ended June 30, 2012 and 2011, respectively. There were no derivatives outstanding at June 30, 2012.