Financial Derivatives - Outstanding Foreign Currency Forward Contracts and Options (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Derivatives Designated as Hedging Instruments under ASC 815 [Member] | Cash Flow Hedges [Member] | Option Contracts [Member] | US Dollars/Philippine Pesos [Member]
Derivative [Line Items]
Notional Amount	$ 40,000	$ 12,000
Settle Through Date	Apr. 30, 2022	Jun. 30, 2021
Derivatives Designated as Hedging Instruments under ASC 815 [Member] | Cash Flow Hedges [Member] | Forwards [Member] | US Dollars/Philippine Pesos [Member]
Derivative [Line Items]
Notional Amount	$ 2,000
Settle Through Date	Aug. 31, 2021
Derivatives Designated as Hedging Instruments under ASC 815 [Member] | Cash Flow Hedges [Member] | Forwards [Member] | US Dollars/Costa Rican Colones [Member]
Derivative [Line Items]
Notional Amount	$ 34,000	$ 36,000
Settle Through Date	Aug. 31, 2022	Dec. 31, 2021
Derivatives Designated as Hedging Instruments under ASC 815 [Member] | Cash Flow Hedges [Member] | Forwards [Member] | Euros/Hungarian Forints [Member]
Derivative [Line Items]
Notional Amount	$ 1,138
Settle Through Date	Dec. 31, 2021
Derivatives Designated as Hedging Instruments under ASC 815 [Member] | Cash Flow Hedges [Member] | Forwards [Member] | Euros/Romanian Leis [Member]
Derivative [Line Items]
Notional Amount	$ 7,514
Settle Through Date	Dec. 31, 2021
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Forwards [Member]
Derivative [Line Items]
Notional Amount	$ 8,693	$ 12,439
Settle Through Date	Nov. 30, 2021	Nov. 30, 2021