Quarterly report pursuant to Section 13 or 15(d)

Interest Rate Derivatives (Details)

v2.4.0.6
Interest Rate Derivatives (Details) (USD $)
1 Months Ended 3 Months Ended
Jan. 31, 2012
Mar. 31, 2012
Mar. 31, 2011
Dec. 31, 2011
Fair values of interest rate swap derivatives        
Fair value of interest rate swaps   $ (2,673,000)   $ (30,147,000)
Cash settlement of the forward starting swaps and interest accrued thereon 29,700,000 29,738,000    
Effect of interest rate derivatives on consolidated statements of operations and comprehensive income        
Amount of loss recognized in AOCL (effective portion)   (1,987,000) (136,000)  
Amount of loss reclassified from AOCL into interest expense (effective portion)   (1,474,000) (1,104,000)  
Interest rate swaps
       
Fair value of interest rate derivatives and balance sheet classification        
Fair value of interest rate swaps classified as prepaid expenses and other assets       111,000
Fair value of Interest rate swaps classified as interest rate derivatives   (2,673,000)   (2,255,000)
Fair value of interest rate swaps not designated as hedge classified as prepaid expenses and other assets       605,000
Fair value of interest rate swaps not designated as hedge classified as interest rate derivatives       (28,608,000)
Approximate amount to be reclassified from AOCL to interest expense over the next 12 months   2,500,000    
Interest rate derivatives in liability position, fair value   2,700,000    
Termination value to settle obligations under interest rate derivative agreements   3,300,000    
Designated | Interest rate swap, effective date January 3, 2011
       
Fair values of interest rate swap derivatives        
Notional Amount   50,000,000    
Fixed rate (as a percent)   0.5025%    
Floating rate index   One-Month LIBOR    
Fair value of interest rate swaps       (1,000)
Designated | Interest rate swap two, effective date January 3, 2011
       
Fair values of interest rate swap derivatives        
Notional Amount   50,000,000    
Fixed rate (as a percent)   0.5025%    
Floating rate index   One-Month LIBOR    
Fair value of interest rate swaps       (1,000)
Designated | Interest rate swap, effective date January 2, 2009
       
Fair values of interest rate swap derivatives        
Notional Amount   120,000,000    
Fixed rate (as a percent)   1.76%    
Floating rate index   One-Month LIBOR    
Fair value of interest rate swaps   (152,000)   (552,000)
Designated | Interest rate swap, effective date January 1, 2010
       
Fair values of interest rate swap derivatives        
Notional Amount   100,000,000    
Fixed rate (as a percent)   1.975%    
Floating rate index   One-Month LIBOR    
Fair value of interest rate swaps   (144,000)   (532,000)
Designated | Interest rate swap, effective date January 3, 2012
       
Fair values of interest rate swap derivatives        
Notional Amount   100,000,000    
Fixed rate (as a percent)   0.6123%    
Floating rate index   One-Month LIBOR    
Fair value of interest rate swaps   (282,000)   55,000
Designated | Interest rate swap one, effective date January 3, 2012
       
Fair values of interest rate swap derivatives        
Notional Amount   100,000,000    
Fixed rate (as a percent)   0.61%    
Floating rate index   One-Month LIBOR    
Fair value of interest rate swaps   (277,000)   56,000
Designated | Interest rate swap two, effective date January 3, 2012
       
Fair values of interest rate swap derivatives        
Notional Amount   100,000,000    
Fixed rate (as a percent)   0.832%    
Floating rate index   One-Month LIBOR    
Fair value of interest rate swaps   (365,000)   (66,000)
Designated | Interest rate swap three, effective date January 3, 2012
       
Fair values of interest rate swap derivatives        
Notional Amount   100,000,000    
Fixed rate (as a percent)   0.832%    
Floating rate index   One-Month LIBOR    
Fair value of interest rate swaps   (363,000)   (49,000)
Designated | Interest rate swap, effective date November 2, 2010
       
Fair values of interest rate swap derivatives        
Notional Amount   39,027,000    
Fixed rate (as a percent)   3.83%    
Floating rate index   One-Month LIBOR    
Fair value of interest rate swaps   (1,090,000)   (1,054,000)
Notional amount of interest rate derivatives after scheduled amortization   36,200,000    
Not-designated | Interest rate swap two, effective date December 30, 2011
       
Fair values of interest rate swap derivatives        
Notional Amount   75,000,000    
Fixed rate (as a percent)   2.0525%    
Floating rate index   Three-Month LIBOR-Reverse    
Fair value of interest rate swaps       260,000
Not-designated | Interest rate swap, effective date September 30, 2011
       
Fair values of interest rate swap derivatives        
Notional Amount   100,000,000    
Fixed rate (as a percent)   3.8415%    
Floating rate index   Three-Month LIBOR    
Fair value of interest rate swaps       (16,333,000)
Not-designated | Interest rate swap two, effective date September 30, 2011
       
Fair values of interest rate swap derivatives        
Notional Amount   75,000,000    
Fixed rate (as a percent)   3.845%    
Floating rate index   Three-Month LIBOR    
Fair value of interest rate swaps       (12,275,000)
Not-designated | Interest rate swap, effective date December 30, 2011
       
Fair values of interest rate swap derivatives        
Notional Amount   100,000,000    
Fixed rate (as a percent)   2.0525%    
Floating rate index   Three-Month LIBOR-Reverse    
Fair value of interest rate swaps       $ 345,000