Derivatives and Hedging Activities (Details) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
	May 15, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2019	Jan. 31, 2019 USD ($) interest_rate_swap	Dec. 31, 2018 USD ($)
Derivative [Line Items]
(Loss) gain on derivatives		$ (7)	$ 344	$ (1,532)	$ (6,436)
Accounting standards update						us-gaap:AccountingStandardsUpdate201712Member
Interest Rate Swap
Derivative [Line Items]
Derivative tax amount		400	200	1,000	2,000
Designated as Hedging Instrument | Foreign Exchange Contract
Derivative [Line Items]
Notional foreign exchange contract outstanding		81,300		81,300
(Loss) gain on derivatives	$ 2,500	(1,200)	1,000	1,200	(700)
Derivative tax amount	800	$ 400	$ 300	$ 400	$ 300
Designated as Hedging Instrument | Foreign Exchange Contract | Contract Termination
Derivative [Line Items]
Notional foreign exchange contract outstanding	88,000
Designated as Hedging Instrument | Foreign Exchange Contract | New Foreign Exchange Contract
Derivative [Line Items]
Notional foreign exchange contract outstanding	$ 81,300
London Interbank Offered Rate (LIBOR) | Interest Rate Swap
Derivative [Line Items]
Number of interest rate swaps | interest_rate_swap							2
Notional foreign exchange contract outstanding							$ 310,000
Variable interest rate							2.52%
Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2017-12
Derivative [Line Items]
Members' Equity								$ 200