Quarterly report pursuant to Section 13 or 15(d)

Interest Rate Derivatives (Details)

v2.4.0.8
Interest Rate Derivatives (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Fair values of interest rate swap derivatives          
Fair value of interest rate swaps $ 3,407,000   $ 3,407,000   $ (6,185,000)
Fair value of interest rate derivatives and balance sheet classification          
Interest rate derivatives 6,963,000   6,963,000   0
Effect of interest rate derivatives on consolidated statements of operations and comprehensive income          
Amount of gain (loss) recognized in accumulated other comprehensive income (loss) (“AOCI”) (effective portion) 7,830,000 (2,639,000) 8,292,000 (4,626,000)  
Amount of loss reclassified from AOCI into interest expense (effective portion) 674,000 928,000 1,332,000 2,402,000  
Interest rate swaps
          
Fair value of interest rate derivatives and balance sheet classification          
Interest rate derivatives 6,963,000   6,963,000   0
Fair value of Interest rate swaps classified as interest rate derivatives (3,556,000)   (3,556,000)   (6,185,000)
Effect of interest rate derivatives on consolidated statements of operations and comprehensive income          
Approximate amount to be reclassified from AOCI to interest expense over the next 12 months 2,400,000   2,400,000    
Interest rate derivatives in liability position, fair value 3,600,000   3,600,000    
Termination value to settle obligations under interest rate derivative agreements 3,800,000   3,800,000    
Designated | Interest rate swap, effective date January 3, 2012, swap one
          
Fair values of interest rate swap derivatives          
Notional Amount 100,000,000   100,000,000    
Fixed rate (as a percent) 0.6123%   0.6123%    
Floating rate index     One-Month LIBOR    
Fair value of interest rate swaps (394,000)   (394,000)   (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   100,000,000    
Fixed rate (as a percent) 0.61%   0.61%    
Floating rate index     One-Month LIBOR    
Fair value of interest rate swaps (391,000)   (391,000)   (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   100,000,000    
Fixed rate (as a percent) 0.832%   0.832%    
Floating rate index     One-Month LIBOR    
Fair value of interest rate swaps (904,000)   (904,000)   (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   100,000,000    
Fixed rate (as a percent) 0.832%   0.832%    
Floating rate index     One-Month LIBOR    
Fair value of interest rate swaps (904,000)   (904,000)   (1,313,000)
Designated | Interest rate swap, effective date November 2, 2010
          
Fair values of interest rate swap derivatives          
Notional Amount 38,087,000 [1]   38,087,000 [1]    
Fixed rate (as a percent) 3.83%   3.83%    
Floating rate index     One-Month LIBOR + 2.25%    
Derivative, Basis Spread on Variable Rate 2.25%   2.25%    
Fair value of interest rate swaps (963,000)   (963,000)   (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   100,000,000    
Fixed rate (as a percent) 0.8055%   0.8055%    
Floating rate index     One-Month LIBOR    
Fair value of interest rate swaps 470,000   470,000   (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   100,000,000    
Fixed rate (as a percent) 0.81%   0.81%    
Floating rate index     One-Month LIBOR    
Fair value of interest rate swaps 458,000   458,000   (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   100,000,000    
Fixed rate (as a percent) 1.673%   1.673%    
Floating rate index     One-Month LIBOR    
Fair value of interest rate swaps 3,227,000   3,227,000   (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   100,000,000    
Fixed rate (as a percent) 1.73%   1.73%    
Floating rate index     One-Month LIBOR    
Fair value of interest rate swaps $ 2,808,000   $ 2,808,000   $ (417,000)
[1] The notional amount of this instrument is scheduled to amortize to $36.2 million.