Accumulated Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2017

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

Summary of activity in accumulated other comprehensive income (loss)

The following tables summarize the components, changes, and reclassifications from accumulated other comprehensive income (loss) for the nine months and three months ended September 30, 2017 and 2016, respectively.

($ in Thousands)	Investment Securities Available For Sale			Defined Benefit Pension and Post Retirement Obligations			Accumulated Other Comprehensive Income (Loss)
Balance January 1, 2017	$	(20,079	)	$	(34,600	)	$	(54,679	)
Other comprehensive income (loss) before reclassifications	1,646			—			1,646
Amounts reclassified from accumulated other comprehensive income (loss)
Personnel expense	—			1,483			1,483
Interest income (amortization of net unrealized losses (gains) on available for sale securities transferred to held to maturity securities)	(2,499		)	—			(2,499		)
Income tax (expense) benefit	328			(567		)	(239		)
Net other comprehensive income (loss) during period	(525		)	916			391
Balance September 30, 2017	$	(20,604	)	$	(33,684	)	$	(54,288	)
Balance January 1, 2016	$	459		$	(33,075	)	$	(32,616	)
Other comprehensive income (loss) before reclassifications	59,849			—			59,849
Amounts reclassified from accumulated other comprehensive income (loss)
Investment securities gain (loss), net	(6,201		)	—			(6,201		)
Personnel expense	—			1,531			1,531
Interest income (amortization of net unrealized losses (gains) on available for sale securities transferred to held to maturity securities)	(4,465		)	—			(4,465		)
Income tax (expense) benefit	(18,768		)	(584		)	(19,352		)
Net other comprehensive income (loss) during period	30,415			947			31,362
Balance September 30, 2016	$	30,874		$	(32,128	)	$	(1,254	)
	Investment Securities Available For Sale			Defined Benefit Pension and Post Retirement Obligations			Accumulated Other Comprehensive Income (Loss)
Balance July 1, 2017	$	(19,428	)	$	(34,042	)	$	(53,470	)
Other comprehensive income (loss) before reclassifications	(1,986		)	—			(1,986		)
Amounts reclassified from accumulated other comprehensive income (loss)
Personnel expense	—			583			583
Interest income (amortization of net unrealized losses (gains) on available for sale securities transferred to held to maturity securities)	76			—			76
Income tax (expense) benefit	734			(225		)	509
Net other comprehensive income (loss) during period	(1,176		)	358			(818		)
Balance September 30, 2017	$	(20,604	)	$	(33,684	)	$	(54,288	)
Balance July 1, 2016	$	45,916		$	(32,463	)	$	13,453
Other comprehensive income (loss) before reclassifications	(22,894		)	—			(22,894		)
Amounts reclassified from accumulated other comprehensive income (loss)
Investment securities gain (loss), net	13			—			13
Personnel expense	—			541			541
Interest income (amortization of net unrealized losses (gains) on available for sale securities transferred to held to maturity securities)	(1,441		)	—			(1,441		)
Income tax (expense) benefit	9,280			(206		)	9,074
Net other comprehensive income (loss) during period	(15,042		)	335			(14,707		)
Balance September 30, 2016	$	30,874		$	(32,128	)	$	(1,254	)