Components of Net Periodic Benefit Cost (Tables)

9 Months Ended

Sep. 30, 2014

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs

7. Components of Net Periodic Benefit Cost

	Three Months Ended September 30,										Nine Months Ended September 30,
	(000's)										(000's)
	Pension Benefits						Post-Retirement Health Benefits				Pension Benefits						Post-Retirement Health Benefits
	2014			2013			2014		2013		2014			2013			2014			2013
Service cost	$	510		$	559		$	13	$	17	$	1,530		$	1,678		$	40		$	51
Interest cost	939			846			44		43		2,817			2,537			131			130
Expected return on plan assets	(948		)	(827		)	—		—		(2,845		)	(2,482		)				—
Amortization of transition obligation	—			—			—		15					—						44
Net amortization of prior service cost	(2		)	(4		)	—		—		(7		)	(12		)				—
Net amortization of net (gain) loss	190			523			—		—		569			1,568			(1		)	—
Net Periodic Benefit Cost	$	689		$	1,097		$	57	$	75	$	2,064		$	3,289		$	170		$	225