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Derivative Financial Instruments (Details 3) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Derivative [Line Items]    
Notional Amount $ 120,925 $ 95,896
Fixed Rate 0.59%  
Effective Date Mar. 29, 2019  
Maturity Date Mar. 31, 2024  
Debt Instrument, Interest Rate, Effective Percentage 1.84%  
Interest Rate Swap [Member]    
Derivative [Line Items]    
Derivative Assets (Liabilities), at Fair Value, Net $ 1,100  
Swedish Kronor    
Derivative [Line Items]    
Notional Amount 6,707 $ 3,608
Swedish Kronor | Interest Rate Swap [Member]    
Derivative [Line Items]    
Notional Amount $ 1,390,200