Quarterly report pursuant to Section 13 or 15(d)

Interest Rate Derivatives (Details)

v2.4.0.6
Interest Rate Derivatives (Details) (USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Fair values of interest rate swap derivatives      
Fair value of interest rate swaps $ (5,080,000)   $ (6,185,000)
Effect of interest rate derivatives on consolidated statements of operations and comprehensive income      
Amount of gain (loss) recognized in accumulated other comprehensive loss (“AOCL”) (effective portion) 462,000 (1,987,000)  
Amount of loss reclassified from AOCL into interest expense (effective portion) 658,000 1,474,000  
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 260,000   0
Fair value of Interest rate swaps classified as interest rate derivatives (5,340,000)   (6,185,000)
Effect of interest rate derivatives on consolidated statements of operations and comprehensive income      
Interest rate derivatives in liability position, fair value 5,300,000    
Approximate amount to be reclassified from AOCL to interest expense over the next 12 months 2,500,000    
Termination value to settle obligations under interest rate derivative agreements 5,300,000    
Designated | Interest rate swap, effective date January 3, 2012, swap one
      
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 (495,000)   (594,000)
Designated | Interest rate swap, effective date January 3, 2012, swap two
      
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 (492,000)   (591,000)
Designated | Interest rate swap, effective date January 3, 2012, swap three
      
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 (1,238,000)   (1,313,000)
Designated | Interest rate swap, effective date January 3, 2012, swap four
      
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 (1,238,000)   (1,313,000)
Designated | Interest rate swap, effective date November 2, 2010
      
Fair values of interest rate swap derivatives      
Notional Amount 38,270,000 [1]    
Fixed rate (as a percent) 3.83%    
Floating rate index One-Month LIBOR + 2.25%    
Derivative, Basis Spread on Variable Rate 2.25%    
Fair value of interest rate swaps (1,176,000)   (1,268,000)
Notional amount of interest rate derivatives after scheduled amortization 36,200,000    
Designated | Interest rate swap, effective date September 2, 2014, swap one
      
Fair values of interest rate swap derivatives      
Notional Amount 100,000,000    
Fixed rate (as a percent) 0.8055%    
Floating rate index One-Month LIBOR    
Fair value of interest rate swaps (329,000)   (263,000)
Designated | Interest rate swap, effective date September 2, 2014, swap two
      
Fair values of interest rate swap derivatives      
Notional Amount 100,000,000    
Fixed rate (as a percent) 0.81%    
Floating rate index One-Month LIBOR    
Fair value of interest rate swaps (339,000)   (272,000)
Designated | Interest rate swap, effective date September 1, 2015, swap one
      
Fair values of interest rate swap derivatives      
Notional Amount 100,000,000    
Fixed rate (as a percent) 1.673%    
Floating rate index One-Month LIBOR    
Fair value of interest rate swaps 260,000   (154,000)
Designated | Interest rate swap, effective date September 1, 2015, swap two
      
Fair values of interest rate swap derivatives      
Notional Amount 100,000,000    
Fixed rate (as a percent) 1.73%    
Floating rate index One-Month LIBOR    
Fair value of interest rate swaps $ (33,000)   $ (417,000)
[1] The notional amount of this instrument is scheduled to amortize to $36.2 million.