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Accumulated Other Comprehensive Income (Loss)
 3 Months Ended
Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)
The following tables summarize the components of accumulated other comprehensive income (loss) at March 31, 2018 and 2017, changes during the three month periods then ended, and reclassifications out of accumulated other comprehensive income (loss) during the three month periods ended March 31, 2018 and 2017, respectively.
($ in Thousands)
Investment
Securities
Available
For Sale
 
Defined Benefit
Pension and
Post Retirement
Obligations
 
Accumulated
Other
Comprehensive
Income (Loss)
Balance January 1, 2018
$
(38,453
)
 
$
(24,305
)
 
$
(62,758
)
Other comprehensive income (loss) before reclassifications
(41,834
)
 
—

 
(41,834
)
Amounts reclassified from accumulated other comprehensive income (loss)


 
 
 

Personnel expense
—

 
(38
)
 
(38
)
Other expense
—

 
465

 
465

Adjustment for adoption of ASU 2016-01
(84
)
 
—

 
(84
)
Adjustment for adoption of ASU 2018-02
(8,419
)
 
(5,235
)
 
(13,654
)
Interest income (amortization of net unrealized losses (gains) on available for sale securities transferred to held to maturity securities)
(297
)
 
—

 
(297
)
Income tax (expense) benefit
10,635

 
(107
)
 
10,528

Net other comprehensive income (loss) during period
(40,000
)
 
(4,915
)
 
(44,915
)
Balance March 31, 2018
$
(78,453
)
 
$
(29,220
)
 
$
(107,673
)
 
 
 
 
 
 
Balance January 1, 2017
$
(20,079
)
 
$
(34,600
)
 
$
(54,679
)
Other comprehensive income (loss) before reclassifications
(2,112
)
 
—

 
(2,112
)
Amounts reclassified from accumulated other comprehensive income (loss)
 
 


 

Investment securities gain (loss), net
—

 
—

 
—

Personnel expense
—

 
(38
)
 
(38
)
Other expense
—

 
488

 
488

Interest income (amortization of net unrealized losses (gains) on available for sale securities transferred to held to maturity securities)
(1,027
)
 
—

 
(1,027
)
Income tax (expense) benefit
1,195

 
(171
)
 
1,024

Net other comprehensive income (loss) during period
(1,944
)
 
279

 
(1,665
)
Balance March 31, 2017
$
(22,023
)
 
$
(34,321
)
 
$
(56,344
)