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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, 2022	Dec. 31, 2021
Derivative [Line Items]
Balance sheet exposure asset (liability)  (note b)	$ (17,130)	$ 18,816
United States Dollars (sell) Indian Rupees (buy)
Derivative [Line Items]
Notional principal amounts (note a)	1,587,500	1,348,600
Balance sheet exposure asset (liability)  (note b)	(25,581)	26,247
United States Dollars (sell) Mexican Peso (buy)
Derivative [Line Items]
Notional principal amounts (note a)	24,000	23,750
Balance sheet exposure asset (liability)  (note b)	1,079	140
United States Dollars (sell) Philippines Peso (buy)
Derivative [Line Items]
Notional principal amounts (note a)	79,200	75,600
Balance sheet exposure asset (liability)  (note b)	(828)	(2,215)
Euro (sell) United States Dollars (buy)
Derivative [Line Items]
Notional principal amounts (note a)	182,163	120,994
Balance sheet exposure asset (liability)  (note b)	480	2,634
Singapore Dollars (buy) United States Dollars (sell)
Derivative [Line Items]
Notional principal amounts (note a)	50,956	3,655
Balance sheet exposure asset (liability)  (note b)	166	65
Euro (sell) Romanian Leu (buy)
Derivative [Line Items]
Notional principal amounts (note a)	51,115	47,506
Balance sheet exposure asset (liability)  (note b)	848	(233)
Japanese Yen (sell) Chinese Renminbi (buy)
Derivative [Line Items]
Notional principal amounts (note a)	8,185	10,440
Balance sheet exposure asset (liability)  (note b)	(327)	202
United States Dollars (sell) Chinese Renminbi (buy)
Derivative [Line Items]
Notional principal amounts (note a)	41,000	45,000
Balance sheet exposure asset (liability)  (note b)	605	120
Pound Sterling (sell) United States Dollars (buy)
Derivative [Line Items]
Notional principal amounts (note a)	32,594	49,031
Balance sheet exposure asset (liability)  (note b)	1,113	545
United States Dollars (sell) Hungarian Font (buy)
Derivative [Line Items]
Notional principal amounts (note a)	12,000	39,000
Balance sheet exposure asset (liability)  (note b)	828	(2,174)
Hungarian Font (Sell) Euro (buy)
Derivative [Line Items]
Notional principal amounts (note a)	0	2,828
Balance sheet exposure asset (liability)  (note b)	0	(17)
Australian Dollars (sell) Indian Rupees (buy)
Derivative [Line Items]
Notional principal amounts (note a)	87,513	97,053
Balance sheet exposure asset (liability)  (note b)	(452)	1,234
United States Dollars (Sell) Polish Zloty (buy)
Derivative [Line Items]
Notional principal amounts (note a)	24,000	0
Balance sheet exposure asset (liability)  (note b)	1,372	0
Japanese Yen (sell) United States Dollars (buy)
Derivative [Line Items]
Notional principal amounts (note a)	10,000	0
Balance sheet exposure asset (liability)  (note b)	(1,134)	0
Israeli Shekel (sell) United States Dollars (buy)
Derivative [Line Items]
Notional principal amounts (note a)	3,000	0
Balance sheet exposure asset (liability)  (note b)	3	0
South African Rand (sell) United States Dollars (buy)
Derivative [Line Items]
Notional principal amounts (note a)	21,000	0
Balance sheet exposure asset (liability)  (note b)	(1,652)	0
Interest rate swaps (floating to fixed)
Derivative [Line Items]
Notional principal amounts (note a)	432,248	460,135
Balance sheet exposure asset (liability)  (note b)	$ 6,350	$ (7,732)

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 https://asc.fasb.org/extlink&oid=125515794&loc=SL5708775-113959

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+ References

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- Definition

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+ 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 https://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
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-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

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