Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2016

Schedule of Net Benefit Costs [Table Text Block]

	Chesapeake Pension Plan						FPU Pension Plan						Chesapeake SERP				Chesapeake Postretirement Plan						FPU Medical Plan
For the Three Months Ended June 30,	2016			2015			2016			2015			2016		2015		2016			2015			2016		2015
(in thousands)
Interest cost	$	105		$	102		$	630		$	626		$	23	$	23	$	11		$	11		$	14	$	15
Expected return on plan assets	(131		)	(135		)	(701		)	(777		)	—		—		—			—			—		—
Amortization of prior service cost	—			—			—			—			—		2		(20		)	(19		)	—		—
Amortization of net loss	103			91			128			114			22		25		17			17			—		2
Net periodic cost (benefit)	77			58			57			(37		)	45		50		8			9			14		17
Amortization of pre-merger regulatory asset	—			—			191			191			—		—		—			—			2		2
Total periodic cost	$	77		$	58		$	248		$	154		$	45	$	50	$	8		$	9		$	16	$	19

	Chesapeake Pension Plan						FPU Pension Plan						Chesapeake SERP				Chesapeake Postretirement Plan						FPU Medical Plan
For the Six Months Ended June 30,	2016			2015			2016			2015			2016		2015		2016			2015			2016		2015
(in thousands)
Interest cost	$	210		$	204		$	1,259		$	1,251		$	46	$	46	$	21		$	22		$	28	$	30
Expected return on plan assets	(261		)	(270		)	(1,402		)	(1,554		)	—		—		—			—			—		—
Amortization of prior service cost	—			—			—			—			—		5		(40		)	(39		)	—		—
Amortization of net loss	206			181			257			227			44		50		34			35			—		3
Net periodic cost (benefit)	155			115			114			(76		)	90		101		15			18			28		33
Amortization of pre-merger regulatory asset	—			—			381			381			—		—		—			—			4		4
Total periodic cost	$	155		$	115		$	495		$	305		$	90	$	101	$	15		$	18		$	32	$	37

Amounts Included in Regulatory asset and AOCI [Table Text Block]

For the Three Months Ended June 30, 2016	Chesapeake Pension Plan		FPU Pension Plan		Chesapeake SERP		Chesapeake Postretirement Plan			FPU Medical Plan		Total
(in thousands)
Prior service credit	$	—	$	—	$	—	$	(20	)	$	—	$	(20	)
Net loss	103		128		22		17			—		270
Total recognized in net periodic benefit cost	$	103	$	128	$	22	$	(3	)	$	—	$	250
Recognized from accumulated other comprehensive loss (1)	$	103	$	24	$	22	$	(3	)	$	—	$	146
Recognized from regulatory asset	—		104		—		—			—		104
Total	$	103	$	128	$	22	$	(3	)	$	—	$	250

For the Three Months Ended June 30, 2015	Chesapeake Pension Plan		FPU Pension Plan		Chesapeake SERP		Chesapeake Postretirement Plan			FPU Medical Plan		Total
(in thousands)
Prior service cost (credit)	$	—	$	—	$	2	$	(19	)	$	—	$	(17	)
Net loss	91		114		25		17			2		249
Total recognized in net periodic benefit cost	$	91	$	114	$	27	$	(2	)	$	2	$	232
Recognized from accumulated other comprehensive loss (1)	$	91	$	22	$	27	$	(2	)	$	—	$	138
Recognized from regulatory asset	—		92		—		—			2		94
Total	$	91	$	114	$	27	$	(2	)	$	2	$	232

For the Six Months Ended June 30, 2016	Chesapeake Pension Plan		FPU Pension Plan		Chesapeake SERP		Chesapeake Postretirement Plan			FPU Medical Plan		Total
(in thousands)
Prior service credit	$	—	$	—	$	—	$	(40	)	$	—	$	(40	)
Net loss	206		257		44		34			—		$	541
Total recognized in net periodic benefit cost	$	206	$	257	$	44	$	(6	)	$	—	$	501
Recognized from accumulated other comprehensive loss (1)	$	206	$	49	$	44	$	(6	)	$	—	$	293
Recognized from regulatory asset	—		208		—		—			—		208
Total	$	206	$	257	$	44	$	(6	)	$	—	$	501

For the Six Months Ended June 30, 2015	Chesapeake Pension Plan		FPU Pension Plan		Chesapeake SERP		Chesapeake Postretirement Plan			FPU Medical Plan		Total
(in thousands)
Prior service cost (credit)	$	—	$	—	$	5	$	(39	)	$	—	$	(34	)
Net loss	181		227		50		35			3		496
Total recognized in net periodic benefit cost	$	181	$	227	$	55	$	(4	)	$	3	$	462
Recognized from accumulated other comprehensive loss (1)	$	181	$	43	$	55	$	(4	)	$	1	$	276
Recognized from regulatory asset	—		184		—		—			2		186
Total	$	181	$	227	$	55	$	(4	)	$	3	$	462