ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)

12 Months Ended

Dec. 31, 2017

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

Schedule of beginning and ending balances of accumulated other comprehensive income

The following table reconciles, by component, the beginning and ending balances of accumulated other comprehensive income, net of tax.

	Accumulated other comprehensive income by component
	Unrealized gains (losses) on available-for- sale securities			Unrecognized pension and postretirement benefit obligations
($ in thousands)				Net actuarial loss			Prior service credit			Total			Total
Balance at December 31, 2015	$	60,369		$	(17,306	)	$	15,370		$	(1,936	)	$	58,433
Other comprehensive income (loss) before reclassifications	(3,885		)	(542		)	(339		)	(881		)	(4,766		)
Amounts reclassified from accumulated other comprehensive income	(6,736		)	1,549			(2,399		)	(850		)	(7,586		)
Other comprehensive income (loss)	(10,621		)	1,007			(2,738		)	(1,731		)	(12,352		)
Balance at December 31, 2016	49,748			(16,299		)	12,632			(3,667		)	46,081
Other comprehensive income (loss) before reclassifications	27,278			5,571			96			5,667			32,945
Amounts reclassified from accumulated other comprehensive income	(8,326		)	958			(2,047		)	(1,089		)	(9,415		)
Other comprehensive income (loss)	18,952			6,529			(1,951		)	4,578			23,530
Reclassification of tax effects from accumulated other comprehensive income resulting from TCJA	14,797			(3,304		)	2,280			(1,024		)	13,773
Balance at December 31, 2017	$	83,497		$	(13,074	)	$	12,961		$	(113	)	$	83,384

Amounts reclassified out of accumulated other comprehensive income (loss)

The following tables display amounts reclassified out of accumulated other comprehensive income and into net income during the three years ended December 31, 2017.

($ in thousands)	Amounts reclassified from accumulated other comprehensive income
Accumulated other comprehensive income components	Year ended December 31, 2017			Affected line item in the consolidated statements of income
Unrealized gains on investments:
Reclassification adjustment for net realized investment gains included in net income	$	12,809		Net realized investment gains, excluding impairment losses on securities available-for-sale
Deferred income tax expense	(4,483		)	Total income tax expense
Net reclassification adjustment	8,326			Net income
Unrecognized pension and postretirement benefit obligations:
Reclassification adjustment for amounts amortized into net periodic pension and postretirement benefit income:
Net actuarial loss	(1,474		)	(1)
Prior service credit	3,150			(1)
Total before tax	1,676
Deferred income tax expense	(587		)
Net reclassification adjustment	1,089
Total reclassification adjustment	$	9,415

(1) These reclassified components of accumulated other comprehensive income are included in the computation of net periodic pension and postretirement benefit income (see note 12, Employee Retirement Plans, for additional details).

($ in thousands)	Amounts reclassified from accumulated other comprehensive income
Accumulated other comprehensive income components	Year ended December 31, 2016			Affected line item in the consolidated statements of income
Unrealized gains on investments:
Reclassification adjustment for net realized investment gains included in net income	$	10,364		Net realized investment gains, excluding impairment losses on securities available-for-sale
Deferred income tax expense	(3,628		)	Total income tax expense
Net reclassification adjustment	6,736			Net income
Unrecognized pension and postretirement benefit obligations:
Reclassification adjustment for amounts amortized into net periodic pension and postretirement benefit income:
Net actuarial loss	(2,383		)	(1)
Prior service credit	3,690			(1)
Total before tax	1,307
Deferred income tax expense	(457		)
Net reclassification adjustment	850
Total reclassification adjustment	$	7,586

(1) These reclassified components of accumulated other comprehensive income are included in the computation of net periodic pension and postretirement benefit income (see note 12, Employee Retirement Plans, for additional details).

($ in thousands)	Amounts reclassified from accumulated other comprehensive income
Accumulated other comprehensive income components	Year ended December 31, 2015			Affected line item in the consolidated statements of income
Unrealized gains on investments:
Reclassification adjustment for net realized investment gains included in net income	$	7,624		Net realized investment gains, excluding impairment losses on securities available-for-sale
Deferred income tax expense	(2,668		)	Total income tax expense
Net reclassification adjustment	4,956			Net income
Unrecognized pension and postretirement benefit obligations:
Reclassification adjustment for amounts amortized into net periodic pension and postretirement benefit income:
Net actuarial loss	(1,327		)	(1)
Prior service credit	3,307			(1)
Total before tax	1,980
Deferred income tax expense	(693		)
Net reclassification adjustment	1,287
Total reclassification adjustment	$	6,243

(1) These reclassified components of accumulated other comprehensive income are included in the computation of net periodic pension and postretirement benefit income (see note 12, Employee Retirement Plans, for additional details).