Quarterly report pursuant to Section 13 or 15(d)

Interest Rate Derivatives (Details)

v3.7.0.1
Interest Rate Derivatives (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
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) $ 224 $ (11,284)  
Amount of losses reclassified from AOCL into interest expense (effective portion) (1,184) (870)  
Interest rate swaps      
Effect of interest rate derivatives on consolidated statements of operations and comprehensive income      
Approximate loss amount to be reclassified from AOCI to interest expense over the next 12 months 2,600    
Interest rate derivatives in liability position, fair value 735    
Termination value to settle obligations under interest rate derivative agreements 892    
Interest rate swaps | Interest Expense      
Effect of interest rate derivatives on consolidated statements of operations and comprehensive income      
Amount of gain (loss) recognized in interest expense (ineffective portion) 454 $ (1,551)  
Interest rate swaps | Prepaid expenses and other current assets      
Fair value of interest rate derivatives and balance sheet classification      
Interest rate swaps designated as cash flow hedges 1,183   $ 158
Interest rate swaps | Other Liabilities      
Fair value of interest rate derivatives and balance sheet classification      
Interest rate swaps designated as cash flow hedges (735)   (1,572)
Designated      
Fair values of interest rate swap derivatives      
Fair value of interest rate swaps 448   (1,414)
Designated | Interest rate swap, effective date September 1, 2015, swap one      
Fair values of interest rate swap derivatives      
Notional Amount $ 100,000    
Fixed rate (as a percent) 1.673%    
Fair value of interest rate swaps $ (301)   (701)
Designated | Interest rate swap, effective date September 1, 2015, swap two      
Fair values of interest rate swap derivatives      
Notional Amount $ 100,000    
Fixed rate (as a percent) 1.73%    
Fair value of interest rate swaps $ (434)   (848)
Designated | Interest rate swap, effective October 13, 2015      
Fair values of interest rate swap derivatives      
Notional Amount $ 13,494    
Fixed rate (as a percent) 1.39%    
Fair value of interest rate swaps $ 147   100
Notional amount of interest rate derivatives after scheduled amortization 12,100    
Designated | Interest rate swap, effective September 1, 2016, swap one      
Fair values of interest rate swap derivatives      
Notional Amount $ 100,000    
Fixed rate (as a percent) 1.9013%    
Fair value of interest rate swaps $ 409   (23)
Designated | Interest rate swap, effective September 1, 2016, swap two      
Fair values of interest rate swap derivatives      
Notional Amount $ 100,000    
Fixed rate (as a percent) 1.905%    
Fair value of interest rate swaps $ 427   48
Designated | Interest rate swap, effective September 1, 2016, swap three      
Fair values of interest rate swap derivatives      
Notional Amount $ 50,000    
Fixed rate (as a percent) 1.9079%    
Fair value of interest rate swaps $ 200   $ 10