Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments - Gain (Loss) on Derivatives (Details)

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Derivative Financial Instruments - Gain (Loss) on Derivatives (Details) - USD ($)
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Swap agreements, net of tax    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (Loss) Recognized in OCI $ (3,275,000) $ (586,000)
Foreign currency forward contracts, net of tax    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (Loss) Recognized in OCI (274,000) 0
Interest expense and other | Swap agreements, net of tax    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (Loss) Recognized in Income (156,000) 220,000
Cost of revenue and operating expenses | Foreign currency forward contracts, net of tax    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (Loss) Recognized in Income $ 22,000 $ 0