Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments (Narrative) (Details)

v2.3.0.15
Derivative Financial Instruments (Narrative) (Details) (USD $)
1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2011
Sep. 30, 2011
Sep. 30, 2011
Sep. 30, 2010
Dec. 31, 2010
Derivative Financial Instruments [Abstract]          
Realized loss reclassified from AOCL to interest expense     $ (9,841,000) $ (5,353,000)  
Estimated payment to be made under interest rate agreement     4,500,000    
Fair value of interest rate swap agreements   8,649,000 8,649,000   10,528,000
Notional amount   245,000,000 245,000,000    
Variable rate term notes 150,000,000        
Realized losses recognized in interest expense   $ 5,500,000