Quarterly report pursuant to Section 13 or 15(d)

Interest Rate Derivatives (Details)

v3.8.0.1
Interest Rate Derivatives (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
May 01, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Effect of interest rate derivatives on consolidated statements of operations and comprehensive income            
Unrealized (loss) gain recognized in AOCL (effective portion)   $ (301) $ 407 $ (1,877) $ (16,581)  
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   1,600   1,600    
Interest rate derivatives in liability position, fair value   305   305    
Termination value to settle obligations under interest rate derivative agreements   484   484    
Interest rate swaps | Interest Expense            
Effect of interest rate derivatives on consolidated statements of operations and comprehensive income            
Loss reclassified from AOCL into interest expense (effective portion)   (615) (1,043) (2,652) (2,763)  
Gain (loss) on derivatives recognized in interest expense (ineffective portion)   34 1,523 132 (347)  
Loss reclassified from AOCL into interest expense (ineffective portion)   0 $ 0 (88) $ 0  
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   126   126   $ 158
Interest rate swaps | Other Liabilities            
Fair value of interest rate derivatives and balance sheet classification            
Interest rate swaps designated as cash flow hedges   (316)   (316)   (1,572)
Designated            
Fair values of interest rate swap derivatives            
Fair value of interest rate swaps   (190)   (190)   (1,414)
Designated | Interest rate swap, effective date September 1, 2015, swap two            
Fair values of interest rate swap derivatives            
Notional Amount   $ 100,000   $ 100,000    
Fixed rate (as a percent)   1.73%   1.73%    
Fair value of interest rate swaps   $ (237)   $ (237)   (848)
Designated | Interest rate swap, effective October 13, 2015            
Fair values of interest rate swap derivatives            
Notional Amount   $ 13,311   $ 13,311    
Fixed rate (as a percent)   1.39%   1.39%    
Fair value of interest rate swaps   $ 126   $ 126   100
Notional amount of interest rate derivatives after scheduled amortization   12,100   12,100    
Designated | Interest rate swap, effective September 1, 2016, swap one            
Fair values of interest rate swap derivatives            
Notional Amount   $ 100,000   $ 100,000    
Fixed rate (as a percent)   1.9013%   1.9013%    
Fair value of interest rate swaps   $ (27)   $ (27)   (23)
Designated | Interest rate swap, effective September 1, 2016, swap two            
Fair values of interest rate swap derivatives            
Notional Amount   $ 100,000   $ 100,000    
Fixed rate (as a percent)   1.905%   1.905%    
Fair value of interest rate swaps   $ (22)   $ (22)   48
Designated | Interest rate swap, effective September 1, 2016, swap three            
Fair values of interest rate swap derivatives            
Notional Amount   $ 50,000   $ 50,000    
Fixed rate (as a percent)   1.9079%   1.9079%    
Fair value of interest rate swaps   $ (30)   $ (30)   10
Designated | Interest rate swap, effective date September 1, 2015, swap one            
Fair values of interest rate swap derivatives            
Notional Amount   $ 100,000   $ 100,000    
Fixed rate (as a percent)   1.673%   1.673%    
Fair value of interest rate swaps   $ 0   $ 0   $ (701)
Interest rate swap cash settled $ 460