Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments (Classifications on Consolidated Balance Sheets) (Details)

v3.5.0.2
Derivative Financial Instruments (Classifications on Consolidated Balance Sheets) (Details) - Designated as Hedging Instrument [Member] - USD ($)
Sep. 30, 2016
Dec. 31, 2015
Derivative [Line Items]    
Notional amount $ 325,000,000  
Derivative, fair value, net (2,217,000) $ (616,000)
Interest Rate Swap One [Member]    
Derivative [Line Items]    
Notional amount $ 50,000,000  
Fixed interest rate 1.3075%  
Derivative, fair value, net $ (502,000) (212,000)
Interest Rate Swap Two [Member]    
Derivative [Line Items]    
Notional amount $ 50,000,000  
Fixed interest rate 1.297%  
Derivative, fair value, net $ (492,000) (198,000)
Interest Rate Swap Three [Member]    
Derivative [Line Items]    
Notional amount $ 50,000,000  
Fixed interest rate 1.3025%  
Derivative, fair value, net $ (497,000) (206,000)
Interest Rate Swap Four [Member]    
Derivative [Line Items]    
Notional amount $ 50,000,000  
Fixed interest rate 1.039%  
Derivative, fair value, net $ (221,000) 0
Interest Rate Swap Five [Member]    
Derivative [Line Items]    
Notional amount $ 50,000,000  
Fixed interest rate 1.0395%  
Derivative, fair value, net $ (222,000) 0
Interest Rate Swap Six [Member]    
Derivative [Line Items]    
Notional amount $ 50,000,000  
Fixed interest rate 1.04%  
Derivative, fair value, net $ (223,000) 0
Interest Rate Swap Seven [Member]    
Derivative [Line Items]    
Notional amount $ 25,000,000  
Fixed interest rate 0.9915%  
Derivative, fair value, net $ (60,000) $ 0