Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Jun. 30, 2016

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

Summary of activity in accumulated other comprehensive income (loss)

The following table summarizes the components of accumulated other comprehensive income (loss) at June 30, 2016 and 2015, changes during the three and six month periods then ended, and reclassifications out of accumulated other comprehensive income (loss) during the three and six month periods ended June 30, 2016 and 2015, respectively.

($ in Thousands)	Investments Securities Available For Sale			Defined Benefit Pension and Post Retirement Obligations			Accumulated Other Comprehensive Income (Loss)
Balance January 1, 2016	$	459		$	(33,075	)	$	(32,616	)
Other comprehensive income before reclassifications	82,743			—			82,743
Amounts reclassified from accumulated other comprehensive income (loss):
Investment securities gain, net	(6,214		)	—			(6,214		)
Personnel expense	—			990			990
Interest income (Amortization of net unrealized gains on available for sale securities transferred to held to maturity securities)	(3,024		)	—			(3,024		)
Income tax expense	(28,048		)	(378		)	(28,426		)
Net other comprehensive income during period	45,457			612			46,069
Balance June 30, 2016	$	45,916		$	(32,463	)	$	13,453
Balance January 1, 2015	$	18,512		$	(23,362	)	$	(4,850	)
Other comprehensive income before reclassifications	12,194			—			12,194
Amounts reclassified from accumulated other comprehensive income (loss):
Investment securities gain, net	(1,242		)	—			(1,242		)
Personnel expense	—			1,090			1,090
Income tax expense	(4,182		)	(416		)	(4,598		)
Net other comprehensive income during period	6,770			674			7,444
Balance June 30, 2015	$	25,282		$	(22,688	)	$	2,594
($ in Thousands)	Investments Securities Available For Sale			Defined Benefit Pension and Post Retirement Obligations			Accumulated Other Comprehensive Income (Loss)
Balance April 1, 2016	$	34,936		$	(32,769	)	$	2,167
Other comprehensive income before reclassifications	22,321			—			22,321
Amounts reclassified from accumulated other comprehensive income (loss):
Investment securities gain, net	(3,116		)	—			(3,116		)
Personnel expense	—			495			495
Interest income (Amortization of net unrealized gains on available for sale securities transferred to held to maturity securities)	(1,452		)	—			(1,452		)
Income tax expense	(6,773		)	(189		)	(6,962		)
Net other comprehensive income during period	10,980			306			11,286
Balance June 30, 2016	$	45,916		$	(32,463	)	$	13,453
Balance April 1, 2015	$	47,825		$	(23,025	)	$	24,800
Other comprehensive loss before reclassifications	(35,224		)	—			(35,224		)
Amounts reclassified from accumulated other comprehensive income (loss):
Investment securities gain, net	(1,242		)	—			(1,242		)
Personnel expense	—			545			545
Income tax (expense) benefit	13,923			(208		)	13,715
Net other comprehensive income (loss) during period	(22,543		)	337			(22,206		)
Balance June 30, 2015	$	25,282		$	(22,688	)	$	2,594