Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Derivative Financial Instruments (Classifications on Consolidated Balance Sheets) (Details) - Designated as Hedging Instrument [Member] - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Derivative [Line Items]    
Notional Amount $ 640,000  
Fair Value (5,134) $ (424)
Interest Rate Swap April 13, 2016 [Member]    
Derivative [Line Items]    
Notional Amount $ 175,000  
Company Fixed Pay Rate 1.03%  
Fair Value $ (411) 1,018
Interest Rate Swap March 1, 2018 [Member]    
Derivative [Line Items]    
Notional Amount $ 40,000  
Company Fixed Pay Rate 2.47%  
Fair Value $ (311) (376)
Interest Rate Swap August 14, 2018 [Member]    
Derivative [Line Items]    
Notional Amount $ 150,000  
Company Fixed Pay Rate 2.20%  
Fair Value $ (817) (896)
Interest Rate Swap July 1, 2019 [Member]    
Derivative [Line Items]    
Notional Amount $ 25,000  
Company Fixed Pay Rate 1.75%  
Fair Value $ (1,314) (170)
Interest Rate Swap January 1, 2021 [1] [Member]    
Derivative [Line Items]    
Notional Amount $ 150,000  
Company Fixed Pay Rate 0.60%  
Fair Value $ (2,043) 0
Interest Rate Swap January 1, 2021 [2] [Member]    
Derivative [Line Items]    
Notional Amount $ 100,000  
Company Fixed Pay Rate 0.22%  
Fair Value $ (238) $ 0
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap April 13, 2016 [Member]    
Derivative [Line Items]    
Bank Pay Rate 1 month  
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap March 1, 2018 [Member]    
Derivative [Line Items]    
Bank Pay Rate 1 month  
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap August 14, 2018 [Member]    
Derivative [Line Items]    
Bank Pay Rate 1 month  
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap July 1, 2019 [Member]    
Derivative [Line Items]    
Bank Pay Rate 1 month  
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap January 1, 2021 [1] [Member]    
Derivative [Line Items]    
Bank Pay Rate 1 month  
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap January 1, 2021 [2] [Member]    
Derivative [Line Items]    
Bank Pay Rate 1 month