v3.10.0.1

EMPLOYEE BENEFIT PLANS Table - Net Periodic Benefit Cost (Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2,405	$ 2,239	$ 7,216	$ 6,717
Interest cost	1,206	1,127	3,618	3,381
Expected return on assets	(1,854)	(1,603)	(5,563)	(4,808)
Amortization of prior service credit	(515)	(515)	(1,543)	(1,546)
Amortization of net loss	544	371	1,631	1,113
Net periodic benefit cost (income)	1,786	1,619	5,359	4,857
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	126	115	378	341
Interest cost	107	107	322	323
Expected return on assets	0	0	0	0
Amortization of prior service credit	(286)	(286)	(859)	(858)
Amortization of net loss	53	47	160	143
Net periodic benefit cost (income)	$ 0	$ (17)	$ 1	$ (51)

X

- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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