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Employee benefit plans | 3 Months Ended
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Mar. 31, 2016
Employee benefit plans | 14. Employee benefit plans The Company has employee benefit plans in the form of certain statutory and other schemes covering its employees. Defined benefit plans In accordance with Indian law, the Company provides a defined benefit retirement plan covering substantially all of its Indian employees. In accordance with Mexican law, the Company provides termination benefits to all of its Mexican employees. In addition, certain of the Company’s subsidiaries in the Philippines and Japan sponsor defined benefit retirement programs. Net defined benefit plan costs for the three months ended March 31, 2015 and 2016 include the following components:
|  | Three months ended March 31, |
|  | 2015 |  |  | 2016 |
Service costs |  | $ | 1,384 |  |  | $ | 1,403 |
Interest costs |  |  | 678 |  |  |  | 698 |
Amortization of actuarial loss |  |  | 85 |  |  |  | 56 |
Expected return on plan assets |  |  | (549 | ) |  |  | (486 | )
Net defined benefit plan costs |  | $ | 1,598 |  |  | $ | 1,671 |
Defined contribution plans During the three months ended March 31, 2015 and 2016, the Company contributed the following amounts to defined contribution plans in various jurisdictions:
|  | Three months ended March 31, |
|  | 2015 |  |  | 2016 |
India |  | $ | 3,909 |  |  | $ | 4,303 |
U.S. |  |  | 2,628 |  |  |  | 3,532 |
U.K. |  |  | 1,040 |  |  |  | 1,652 |
China |  |  | 3,516 |  |  |  | 3,753 |
Other regions |  |  | 1,106 |  |  |  | 1,265 |
Total |  | $ | 12,199 |  |  | $ | 14,505 |

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49170332&loc=SL14450702-114947 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2410-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39675-114964 Reference 4: http://www.xbrl.org/2003/role/presentationRef -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 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414199&loc=d3e39622-114963 + Details
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