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PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS | 9 Months Ended
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Sep. 29, 2018
Retirement Benefits [Abstract] |
PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS | PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS The Company retrospectively adopted ASU 2017-07 in fiscal year 2018. Service cost is reflected in Cost of services provided (excluding amortization of intangible assets) and Selling, general and administrative within the unaudited condensed consolidated statements of income. All other components of net periodic cost are recorded in Other income, net within the unaudited condensed consolidated statements of income. See Note 1, “Basis of Presentation.” The following table provides the components of net periodic cost for the Company’s pension, deferred compensation and executive supplemental life insurance retirement plans:
| Three Months Ended |  | Nine Months Ended
| September 29, 2018 |  | September 30, 2017 |  | September 29, 2018 |  | September 30, 2017
| (in thousands)
Service cost | $ | 814 |  |  | $ | 749 |  |  | $ | 2,629 |  |  | $ | 2,277 |
Interest cost | 2,752 |  |  | 2,663 |  |  | 8,241 |  |  | 8,428 |
Expected return on plan assets | (3,801 | ) |  | (3,476 | ) |  | (11,690 | ) |  | (10,411 | )
Amortization of prior service credit | (135 | ) |  | (134 | ) |  | (406 | ) |  | (392 | )
Amortization of net loss | 736 |  |  | 1,017 |  |  | 2,267 |  |  | 3,030 |
Net periodic cost | $ | 366 |  |  | $ | 819 |  |  | $ | 1,041 |  |  | $ | 2,932 |
The net periodic cost for the Company’s other post-retirement benefit plan for the three and nine months ended September 29, 2018 and September 30, 2017 was not significant.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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