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The Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
Number
Jun. 30, 2018
USD ($)
Jun. 30, 2019
USD ($)
Number
Jun. 30, 2018
USD ($)
Not Designated as Hedging Instrument [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Number of Instruments | Number 4   4  
Buy Notional $ 1,940   $ 1,940  
Sell A U D Buy U S D Fwd Contract [Member] | Not Designated as Hedging Instrument [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Number of Instruments | Number 1   1  
Sell Notional $ 100   $ 100  
Buy Notional $ 71   $ 71  
Sell C A D Buy U S D Fwd Contract [Member] | Not Designated as Hedging Instrument [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Number of Instruments | Number 3   3  
Sell Notional $ 2,500   $ 2,500  
Buy Notional 1,869   1,869  
Cash Flow Hedging [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain or (Loss) Recognized in OCI on Derivative 257    
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income     257
Cash Flow Hedging [Member] | Interest Rate Floor [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain or (Loss) Recognized in OCI on Derivative $ 257    
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income     $ 257
Number of Instruments | Number 1   1