Annual report pursuant to Section 13 and 15(d)

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

v3.20.4
Derivative Financial Instruments - Classifications on Consolidated Balance Sheets (Details) - Designated as Hedging Instrument [Member] - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Derivatives, Fair Value [Line Items]    
Notional Amount $ 640,000  
Fair Value (3,358) $ (424)
Interest Rate Swap One [Member]    
Derivatives, Fair Value [Line Items]    
Notional Amount $ 175,000  
Company Average Fixed Pay Rate 1.03%  
Fair Value $ (17) 1,018
Interest Rate Swap Two [Member]    
Derivatives, Fair Value [Line Items]    
Notional Amount $ 40,000  
Company Average Fixed Pay Rate 2.47%  
Fair Value $ (75) (376)
Interest Rate Swap Three [Member]    
Derivatives, Fair Value [Line Items]    
Notional Amount $ 150,000  
Company Average Fixed Pay Rate 2.20%  
Fair Value $ (34) (896)
Interest Rate Swap Four [Member]    
Derivatives, Fair Value [Line Items]    
Notional Amount $ 25,000  
Company Average Fixed Pay Rate 1.75%  
Fair Value $ (1,192) (170)
Interest Rate Swap Five [Member]    
Derivatives, Fair Value [Line Items]    
Notional Amount $ 150,000  
Company Average Fixed Pay Rate 0.60%  
Fair Value $ (1,901) 0
Interest Rate Swap Six    
Derivatives, Fair Value [Line Items]    
Notional Amount $ 100,000  
Company Average Fixed Pay Rate 0.22%  
Fair Value $ (139) $ 0
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap One [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Interest Rate Term 1 month  
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap Two [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Interest Rate Term 1 month  
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap Three [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Interest Rate Term 1 month  
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap Four [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Interest Rate Term 1 month  
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap Five [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Interest Rate Term 1 month  
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap Six    
Derivatives, Fair Value [Line Items]    
Derivative, Interest Rate Term 1 month