RETIREMENT PLANS (Tables)

9 Months Ended

Sep. 30, 2016

Defined Benefit Plan Disclosure [Line Items]

The components of net periodic benefit cost for the Company’s defined benefit plans for the three months and nine months ended September 30, 2016 and 2015 were as follows (in thousands):

	Pension Benefits
	Pension Plan								SERP
	Three months ended September 30,								Three months ended September 30,
	2016				2015				2016			2015
Components of net periodic benefit cost:
Service cost		$	3,351			$	3,673			$	—		$	—
Interest cost			3,531				3,327				16			16
Expected return on plan assets			(4,202	)			(4,481	)			—			—
Amortization of actuarial loss			1,372				1,932				7			7
Net periodic benefit cost		$	4,052			$	4,451			$	23		$	23

	Pension Benefits
	Pension Plan								SERP
	Nine months ended September 30,								Nine months ended September 30,
	2016				2015				2016			2015
Components of net periodic benefit cost:
Service cost		$	10,053			$	11,020			$	—		$	—
Interest cost			10,594				9,983				49			48
Expected return on plan assets			(12,606	)			(13,449	)			—			—
Amortization of actuarial loss			4,115				5,799				20			21
Net periodic benefit cost		$	12,156			$	13,353			$	69		$	69

Other Postretirement Benefits [Member]

Defined Benefit Plan Disclosure [Line Items]

Components of Net Periodic Benefit Cost

The components of net periodic benefit cost for the Company’s postretirement benefit plan for the three months and nine months ended September 30, 2016 and 2015 were as follows (in thousands):

	Other Postretirement Benefits								Other Postretirement Benefits
	Postretirement Welfare Plan								Postretirement Welfare Plan
	Three months ended September 30,								Nine months ended September 30,
	2016				2015				2016				2015
Components of net periodic benefit cost:
Service cost		$	—			$	—			$	—			$	—
Interest cost			7				9				22				27
Amortization of actuarial gain			(186	)			(199	)			(560	)			(594	)
Net periodic benefit cost		$	(179	)		$	(190	)		$	(538	)		$	(567	)