The following table represents the changes in accumulated other comprehensive income (loss), net of tax, for the three month period ended June 30, 2018 (in thousands):



	Gains and Losses on Cash Flow Hedges			Change in Valuation Allowance			Total
Balance as of March 31, 2018	$	(546	)	$	(172	)	$	(718	)
Other comprehensive income before reclassifications:
Change in fair value of cash flow derivatives	(445		)	—			(445		)
Income tax effect	107			(107		)	—
Net of tax	(338		)	(107		)	(445		)
Amounts reclassified from accumulated other comprehensive loss:
Oil and gas sales	307			—			307
Income tax effect	(74		)	74			—
Net of tax	233			74			307

Derivatives expense	54			—			54
Income tax effect	(13		)	13			—
Net of tax	41			13			54
Net other comprehensive income	(64		)	(20		)	(84		)
Balance as of June 30, 2018	$	(610	)	$	(192	)	$	(802	)

The following table represents the changes in accumulated other comprehensive income (loss), net of tax, for the six

month period ended June 30, 2018 (in thousands):



	Gains and Losses on Cash Flow Hedges			Change in Valuation Allowance			Total
Balance as of December 31, 2017	$	278		$	—		$	278
Other comprehensive income before reclassifications:
Change in fair value of cash flow derivatives	(990		)	—			(990		)
Income tax effect	238			(238		)	—
Net of tax	(752		)	(238		)	(990		)
Amounts reclassified from accumulated other comprehensive income:
Oil and gas sales	(233		)	—			(233		)
Income tax effect	56			33			89
Net of tax	(177		)	33			(144		)
Amounts reclassified from accumulated other comprehensive loss:
Derivatives expense	54			—			54
Income tax effect	(13		)	13			—
Net of tax	41			13			54
Net other comprehensive loss	(888		)	(192		)	(1,080		)
Balance as of June 30, 2018	$	(610	)	$	(192	)	$	(802	)

The following table represents the changes in accumulated other comprehensive income (loss), net of tax, for the three month period ended June 30, 2017 (in thousands):



	Gains and Losses on Cash Flow Hedges			Change in Valuation Allowance			Total
Balance as of March 31, 2017	$	(981	)	$	(581	)	$	(1,562	)
Other comprehensive income before reclassifications:
Change in fair value of derivatives	2,179			—			2,179
Income tax effect	(810		)	581			(229		)
Net of tax	1,369			581			1,950
Amounts reclassified from accumulated other comprehensive income:
Oil and gas sales	(108		)	—			(108		)
Income tax effect	40			—			40
Net of tax	(68		)	—			(68		)
Net other comprehensive loss	1,301			581			1,882
Balance as of June 30, 2017	$	320		$	—		$	320

The following table represents the changes in accumulated other comprehensive income (loss), net of tax, for the six month period ended June 30, 2017 (in thousands):



	Gains and Losses on Cash Flow Hedges			Change in Valuation Allowance			Total
Balance as of December 31, 2016	$	(2,983	)	$	(1,767	)	$	(4,750	)
Other comprehensive income before reclassifications:
Change in fair value of derivatives	5,045			—			5,045
Income tax effect	(1,876		)	1,767			(109		)
Net of tax	3,169			1,767			4,936
Amounts reclassified from accumulated other comprehensive income:
Oil and gas sales	214			—			214
Income tax effect	(80		)	—			(80		)
Net of tax	134			—			134
Net other comprehensive loss	3,303			1,767			5,070
Balance as of June 30, 2017	$	320		$	—		$	320