Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Jun. 30, 2015

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

Summary of activity in accumulated other comprehensive income (loss)

($ in Thousands)	Investments Securities Available For Sale			Defined Benefit Pension and Postretirement Obligations			Accumulated Other Comprehensive Income (Loss)
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)	(1,242		)	1,090			(152		)
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
Balance January 1, 2014	$	(11,396	)	$	(12,848	)	$	(24,244	)
Other comprehensive income before reclassifications	56,184			—			56,184
Amounts reclassified from accumulated other comprehensive income (loss)	(412		)	662			250
Income tax expense	(21,441		)	(255		)	(21,696		)
Net other comprehensive income during period	34,331			407			34,738
Balance June 30, 2014	$	22,935		$	(12,441	)	$	10,494
($ in Thousands)	Investments Securities Available For Sale			Defined Benefit Pension and Postretirement Obligations			Accumulated Other Comprehensive Income (Loss)
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)	(1,242		)	545			(697		)
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
Balance April 1, 2014	$	1,067		$	(12,644	)	$	(11,577	)
Other comprehensive income before reclassifications	35,557			—			35,557
Amounts reclassified from accumulated other comprehensive income (loss)	(34		)	331			297
Income tax expense	(13,655		)	(128		)	(13,783		)
Net other comprehensive income during period	21,868			203			22,071
Balance June 30, 2014	$	22,935		$	(12,441	)	$	10,494