OTHER COMPREHENSIVE INCOME (LOSS) (Tables)

6 Months Ended

Jun. 30, 2016

Equity [Abstract]

Other Comprehensive Income (Loss) Components and Related Tax Effects

Other comprehensive income (loss) components and related tax effects for the three-month periods are as follows:

	Unrealized Gains (Losses) on Securities Availablefor Sale			Disproportionate Tax Effect from Securities Available for Sale			Losses on Securities Transferred From Available for Sale to Held to Maturity			Unrealized Gains (Losses) from Postretirement Plan			Disproportionate Tax Effect from Postretirement Plan		Total
June 30, 2016	(Dollars in thousands)
Balances at beginning of period,    net of tax	$	3,937		$	(17,110	)	$	(926	)	$	650		$	511	$	(12,938	)
Other comprehensive income    before reclassifications		4,594			—			—			—			—		4,594
Amortization of unrealized gains    of postretirement plan    recognized in other    comprehensive income		—			—			—			(181	)		—		(181	)
Accretion of unrealized losses of    securities transferred from    available for sale to held to    maturity recognized in other    comprehensive income		—			—			37			—			—		37
Reclassification adjustment for    gains realized in income		(152	)		—			—			—			—		(152	)
Net current period other    comprehensive income		4,442			—			37			(181	)		—		4,298
Balances at end of period, net of    tax	$	8,379		$	(17,110	)	$	(889	)	$	469		$	511	$	(8,640	)

	Unrealized Gains (Losses) on Securities Available for Sale			Disproportionate Tax Effect from Securities Available for Sale			Unrealized Gains (Losses) from Postretirement Plan		Disproportionate Tax Effect from Postretirement Plan		Total
June 30, 2015	(Dollars in thousands)
Balances at beginning of period, net    of tax	$	(425	)	$	(17,110	)	$	916	$	511	$	(16,108	)
Other comprehensive income    before reclassifications		(5,937	)		—			—		—		(5,937	)
Reclassification adjustment for    gains realized in income		—			—			—		—		—
Net current period other    comprehensive income		(5,937	)		—			—		—		(5,937	)
Balances at end of period, net of tax	$	(6,362	)	$	(17,110	)	$	916	$	511	$	(22,045	)

Other comprehensive income (loss) components and related tax effects for the six-month periods are as follows:

	Unrealized Gains (Losses) on Securities Availablefor Sale			Disproportionate Tax Effect from Securities Available for Sale			Losses on Securities Transferred From Available for Sale to Held to Maturity			Unrealized Gains (Losses) from Postretirement Plan			Disproportionate Tax Effect from Postretirement Plan		Total
June 30, 2016	(Dollars in thousands)
Balances at beginning of period,    net of tax	$	(2,492	)	$	(17,110	)	$	(960	)	$	831		$	511	$	(19,220	)
Other comprehensive income    before reclassifications		11,122									—			—		11,122
Amortization of unrealized gains    of postretirement plan    recognized in other    comprehensive income					—			—			(362	)		—		(362	)
Accretion of unrealized losses of    securities transferred from    available for sale to held to    maturity recognized in other    comprehensive income		—			—			71			—			—		71
Reclassification adjustment for    gains realized in income		(251	)		—			—			—			—		(251	)
Net current period other    comprehensive income		10,871			—			71			(362	)		—		10,580
Balances at end of period, net of    tax	$	8,379		$	(17,110	)	$	(889	)	$	469		$	511	$	(8,640	)

	Unrealized Gains (Losses) on Securities Available for Sale			Disproportionate Tax Effect from Securities Available for Sale			Unrealized Gains (Losses) from Postretirement Plan		Disproportionate Tax Effect from Postretirement Plan		Total
June 30, 2015	(Dollars in thousands)
Balances at beginning of period, net    of tax	$	(4,315	)	$	(17,110	)	$	916	$	511	$	(19,998	)
Other comprehensive income    before reclassifications		(2,040	)		—			—		—		(2,040	)
Reclassification adjustment for    gains realized in income		(7	)		—			—		—		(7	)
Net current period other    comprehensive income		(2,047	)		—			—		—		(2,047	)
Balances at end of period, net of tax	$	(6,362	)	$	(17,110	)	$	916	$	511	$	(22,045	)

Summary of Reclassification Out of Each Component of Accumulated Comprehensive Income (Loss)

The following are significant amounts reclassified out of each component of accumulated comprehensive income (loss) for the three months ended June 30, 2016:

	Amount Reclassified			Affected Line Item on
	From Accumulated			the Statement Where
Details About Accumulated Other Comprehensive	Other Comprehensive			Net Income is
Income Components	Income			Presented
	(Dollars in thousands)
Realized net gains on the sale of available for sale securities	$	233		Net gainson securitiesavailable for sale
		(81	)	Tax expense
		152		Net of tax
Amortization of postretirement benefits prior service costs		278		Reduction in salaries and employee benefits
		(97	)	Tax expense
		181		Net of tax
Total reclassification during the period	$	333		Increase to net income

The following is significant amounts reclassified out of each component of accumulated comprehensive income (loss) for the three months ended June 30, 2015:

	Amount Reclassified		Affected Line Item on
	From Accumulated		the Statement Where
Details About Accumulated Other Comprehensive	Other Comprehensive		Net Income is
Income Components	Income		Presented
	(Dollars in thousands)
Realized net gains on the sale of available for sale securities	$	—	Net gains on securitiesavailable for sale
		—	Tax expense
Total reclassification during the period	$	—	Net of tax, increase to net income

The following are significant amounts reclassified out of each component of accumulated comprehensive income (loss) for the six months ended June 30, 2016:

	Amount Reclassified			Affected Line Item on
	From Accumulated			the Statement Where
Details About Accumulated Other Comprehensive	Other Comprehensive			Net Income is
Income Components	Income			Presented
	(Dollars in thousands)
Realized net gains on the sale of available for sale securities	$	386		Net gainson securitiesavailable for sale
		(135	)	Tax expense
		251		Net of tax
Amortization of postretirement benefits prior service costs		556		Reduction in salaries and employee benefits
		(194	)	Tax expense
		362		Net of tax
Total reclassification during the period	$	613		Increase to net income

The following are significant amounts reclassified out of each component of accumulated comprehensive income (loss) for the six months ended June 30, 2015:

	Amount Reclassified			Affected Line Item on
	From Accumulated			the Statement Where
Details About Accumulated Other Comprehensive	Other Comprehensive			Net Income is
Income Components	Income			Presented
	(Dollars in thousands)
Realized net gains on the sale of available for sale securities	$	11		Net gains on securitiesavailable for sale
		(4	)	Tax expense
Total reclassification during the period	$	7		Increase to net income