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Derivative Financial Instruments - Schedule of aggregate notional principal amounts of outstanding derivative financial instruments with related balance sheet exposure (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Derivative financial instrument, balance sheet exposure asset (liability)	$ 18,816	$ (13,272)
United States Dollars (sell) Indian Rupees (buy)
Derivative [Line Items]
Derivative instrument notional principal amount	1,348,600	1,150,000
Derivative financial instrument, balance sheet exposure asset (liability)	26,247	15,207
United States Dollars (sell) Mexican Peso (buy)
Derivative [Line Items]
Derivative instrument notional principal amount	23,750	17,500
Derivative financial instrument, balance sheet exposure asset (liability)	140	716
United States Dollars (sell) Philippines Peso (buy)
Derivative [Line Items]
Derivative instrument notional principal amount	75,600	67,200
Derivative financial instrument, balance sheet exposure asset (liability)	(2,215)	1,332
Euro (sell) United States Dollars (buy)
Derivative [Line Items]
Derivative instrument notional principal amount	120,994	96,651
Derivative financial instrument, balance sheet exposure asset (liability)	2,634	(5,659)
Singapore Dollars (buy) United States Dollars (sell)
Derivative [Line Items]
Derivative instrument notional principal amount	3,655	10,153
Derivative financial instrument, balance sheet exposure asset (liability)	65	66
Euro (sell) Romanian Leu (buy)
Derivative [Line Items]
Derivative instrument notional principal amount	47,506	29,489
Derivative financial instrument, balance sheet exposure asset (liability)	(233)	(22)
Japanese Yen (sell) Chinese Renminbi (buy)
Derivative [Line Items]
Derivative instrument notional principal amount	10,440	19,230
Derivative financial instrument, balance sheet exposure asset (liability)	202	473
United States Dollars (sell) Chinese Renminbi (buy)
Derivative [Line Items]
Derivative instrument notional principal amount	45,000	0
Derivative financial instrument, balance sheet exposure asset (liability)	120	0
Pound Sterling (sell) United States Dollars (buy)
Derivative [Line Items]
Derivative instrument notional principal amount	49,031	0
Derivative financial instrument, balance sheet exposure asset (liability)	545	0
United States Dollars (sell) Hungarian Font (buy)
Derivative [Line Items]
Derivative instrument notional principal amount	39,000	30,000
Derivative financial instrument, balance sheet exposure asset (liability)	(2,174)	904
Hungarian Font (Sell) Euro (buy)
Derivative [Line Items]
Derivative instrument notional principal amount	2,828	10,444
Derivative financial instrument, balance sheet exposure asset (liability)	(17)	61
Australian Dollars (sell) Indian Rupees (buy)
Derivative [Line Items]
Derivative instrument notional principal amount	97,053	140,525
Derivative financial instrument, balance sheet exposure asset (liability)	1,234	(7,670)
Interest rate swaps (floating to fixed)
Derivative [Line Items]
Derivative instrument notional principal amount	460,135	488,022
Derivative financial instrument, balance sheet exposure asset (liability)	$ (7,732)	$ (18,680)

X

- Definition

Fair value of credit risk derivative asset after deduction of credit risk derivative liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5708775-113959

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+ References

No definition available.

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

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