Quarterly report pursuant to Section 13 or 15(d)

PENSION AND RETIREMENT BENEFIT PLANS. (Details)

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PENSION AND RETIREMENT BENEFIT PLANS. (Details) - Retirement Plan [Member] - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Interest cost $ 190 $ 174 $ 380 $ 348
Service cost 94 106 188 212
Expected return on plan assets (190) (204) (380) (408)
Net periodic expense $ 94 $ 76 $ 188 $ 152