RETIREMENT PLANS (Tables)

6 Months Ended

Jun. 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 six months ended June 30, 2016 and 2015 were as follows (in thousands):

	Pension Benefits
	Pension Plan						SERP
	Three months ended June 30,						Three months ended June 30,
	2016			2015			2016		2015
Components of net periodic benefit cost:
Service cost	$	3,482		$	3,517		$	—	$	—
Interest cost		3,651			3,302			17		16
Expected return on plan assets		(4,251	)		(4,485	)		—		—
Amortization of actuarial loss		1,525			1,903			6		7
Net periodic benefit cost	$	4,407		$	4,237		$	23	$	23

	Pension Benefits
	Pension Plan						SERP
	Six months ended June 30,						Six months ended June 30,
	2016			2015			2016		2015
Components of net periodic benefit cost:
Service cost	$	6,702		$	7,347		$	—	$	—
Interest cost		7,063			6,656			33		32
Expected return on plan assets		(8,404	)		(8,968	)		—		—
Amortization of actuarial loss		2,743			3,867			13		14
Net periodic benefit cost	$	8,104		$	8,902		$	46	$	46

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 six months ended June 30, 2016 and 2015 were as follows (in thousands):

	Other Postretirement Benefits						Other Postretirement Benefits
	Postretirement Welfare Plan						Postretirement Welfare Plan
	Three months ended June 30,						Six months ended June 30,
	2016			2015			2016			2015
Components of net periodic benefit cost:
Service cost	$	—		$	—		$	—		$	—
Interest cost		3			5			15			18
Amortization of actuarial gain		(186	)		(222	)		(374	)		(395	)
Net periodic benefit cost	$	(183	)	$	(217	)	$	(359	)	$	(377	)