Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2015

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Reclassification out of Accumulated Other Comprehensive Income

The components of the reclassification adjustments for the period, net of tax, included in Other Comprehensive Income were as follows (in thousands):

	Derivatives Designated as Cash Flow Hedges	Amounts Reclassified from AOCI
		2015			2014
Gains and Losses on cash flow hedges
Interest rate swaps gain (loss)	Interest expense	$	64		$	64
Income tax	Income tax benefit (expense)	319			(364		)
Total reclassification adjustments related to cash flow hedges, net of tax		$	383		$	(300	)
Amortization of defined benefit plans:
Actuarial gain (loss)	Operations and maintenance	$	94		$	45
Income tax	Income tax benefit (expense)	(33		)	(16		)
Total reclassification adjustments related to defined benefit plans, net of tax		$	61		$	29

Schedule of Accumulated Other Comprehensive Income (Loss)

Balances by classification included within Accumulated other comprehensive loss on the accompanying Balance Sheets were as follows (in thousands):

	Interest Rate Swaps			Employee Benefit Plans			Total
As of December 31, 2014	$	(1,018	)	$	(801	)	$	(1,819	)
Other comprehensive income (loss)	383			129			512
As of December 31, 2015	$	(635	)	$	(672	)	$	(1,307	)
	Interest Rate Swaps			Employee Benefit Plans			Total
As of December 31, 2013	$	(719	)	$	(478	)	$	(1,197	)
Other comprehensive income (loss)	(299		)	(323		)	(622		)
As of December 31, 2014	$	(1,018	)	$	(801	)	$	(1,819	)