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Employee benefit plans (Tables)

3 Months Ended

Mar. 31, 2020

Compensation And Retirement Disclosure [Abstract]

Net Defined Benefit Plan Costs

Net defined benefit plan costs for the three months ended March 31, 2019 and 2020 include the following components:

		Three months ended March 31,
		2019				2020
Service costs		$	1,973			$	2,927
Interest costs			1,072				1,357
Amortization of actuarial loss			317				651
Expected return on plan assets			(633	)			(1,181	)
Net defined benefit plan costs		$	2,729			$	3,754

Amount Contributed to Defined Contribution Plans in Various Jurisdictions

During the three months ended March 31, 2019 and 2020, the Company contributed the following amounts to defined contribution plans in various jurisdictions:

		Three months ended March 31,
		2019				2020
India		$	6,565			$	8,201
U.S.			4,326				4,423
U.K.			2,423				2,973
China			4,773				3,923
Other regions			1,069				2,115
Total		$	19,156			$	21,635

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- References

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- Definition

Tabular disclosure of defined contribution pension plans or defined contribution other postretirement plans, separately for pension plans and other postretirement benefit plans.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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- Definition

Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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