Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Derivative Financial Instruments (Details)

v3.6.0.2
Summary of Significant Accounting Policies - Derivative Financial Instruments (Details) - Interest Rate Swap
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Sep. 30, 2015
USD ($)
Oct. 31, 2012
USD ($)
swap
Jul. 31, 2011
USD ($)
Mar. 31, 2010
USD ($)
Jun. 30, 2014
USD ($)
Dec. 31, 2013
USD ($)
Sep. 30, 2013
USD ($)
Feb. 28, 2013
swap
Dec. 31, 2007
USD ($)
swap
Derivative [Line Items]                  
Number of instruments | swap                 2
Interest expense reclassified from accumulated other comprehensive (loss) income         $ 566        
Not Designated as Hedging Instrument                  
Derivative [Line Items]                  
Number of instruments | swap               1  
Amount of (gain) loss recognized in income on derivative           $ (266)      
Interest Rate Swap Contract 1                  
Derivative [Line Items]                  
Notional amount                 $ 13,081
Interest rate swaps, variable to fixed interest rates                 5.40%
Interest Rate Swap Contract 2                  
Derivative [Line Items]                  
Notional amount                 $ 3,256
Interest rate swaps, variable to fixed interest rates                 5.30%
Interest Rate Swap Contract 3                  
Derivative [Line Items]                  
Notional amount       $ 27,900          
Interest rate swaps, variable to fixed interest rates       3.74%          
Term of interest rate swap contract       14 years          
Interest Rate Swap Contract 4                  
Derivative [Line Items]                  
Notional amount     $ 38,571            
Interest rate swaps, variable to fixed interest rates     1.965%            
Term of interest rate swap contract     5 years            
Interest Rate Swap Contract 5                  
Derivative [Line Items]                  
Number of instruments | swap   2              
Notional amount   $ 16,750              
Interest rate swaps, variable to fixed interest rates   1.71%              
Term of interest rate swap contract   8 years              
Future increase in notional amount             $ 42,247    
Interest Rate Swap Contract 6                  
Derivative [Line Items]                  
Number of instruments | swap   2              
Notional amount   $ 25,377              
Interest rate swaps, variable to fixed interest rates   3.70%              
Term of interest rate swap contract   8 years              
Interest Rate Swap Contract 7                  
Derivative [Line Items]                  
Notional amount $ 20,746                
Interest rate swaps, variable to fixed interest rates 2.19%                
Term of interest rate swap contract 7 years                
Interest Rate Swap Contract 8                  
Derivative [Line Items]                  
Notional amount $ 14,084                
Interest rate swaps, variable to fixed interest rates 3.26%                
Term of interest rate swap contract 15 years