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Derivative Instruments and Hedging Activities:
 12 Months Ended
Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivative Instruments and Hedging Activities:
Derivative Instruments and Hedging Activities:
The Company recorded other comprehensive income related to the marking-to-market of interest rate agreements of $3,237 for the year ended December 31, 2011. There were no derivatives outstanding at December 31, 2013 or 2012.
The Company had an interest rate swap agreement designated as a hedging instrument with a fair value of $3,237 that was included in other accrued liabilities at January 1, 2011. This instrument expired during the year ended December 31, 2011.