Components of Net Periodic Benefit Cost (Tables)

6 Months Ended

Jun. 30, 2014

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs

Components of Net Periodic Benefit Cost

	Three Months Ended June 30,										Six Months Ended June 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	$	1,020		$	1,119		$	26		$	34
Interest cost	939			846			44		43		1,878			1,692			87			87
Expected return on plan assets	(948		)	(827		)	—		—		(1,897		)	(1,655		)				—
Amortization of transition obligation	—			—			—		15					—						30
Net amortization of prior service cost	(2		)	(4		)	—		—		(5		)	(8		)				—
Net amortization of net (gain) loss	190			523			—		—		379			1,046			(1		)	—
Net Periodic Benefit Cost	$	689		$	1,097		$	57	$	75	$	1,375		$	2,194		$	112		$	151