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Comprehensive Income (Tables)
 9 Months Ended
Sep. 30, 2016
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]  
Schedule of Components of Comprehensive Income-Gross and Net of Tax
Third Quarter 2016
 
 
 
 
 
 
($ in thousands)
 
Gross
 
Tax
 
Net
Net income
 
$
55,443

 
16,941

 
38,502

Components of OCI:
 
 

 
 

 
 

Unrealized losses on investment securities:
 
 

 
 

 
 

Unrealized holding losses during period
 
(12,992
)
 
(4,548
)
 
(8,444
)
Amounts reclassified into net income:
 
 
 
 
 
 
HTM securities
 
(13
)
 
(4
)
 
(9
)
Realized gains on AFS securities
 
(3,684
)
 
(1,289
)
 
(2,395
)
    Total unrealized losses on investment securities
 
(16,689
)
 
(5,841
)
 
(10,848
)
Defined benefit pension and post-retirement plans:
 
 

 
 

 
 

Amounts reclassified into net income:
 
 

 
 

 
 

Net actuarial loss
 
1,615

 
565

 
1,050

    Total defined benefit pension and post-retirement plans
 
1,615

 
565

 
1,050

Other comprehensive loss
 
(15,074
)
 
(5,276
)
 
(9,798
)
Comprehensive income
 
$
40,369

 
11,665

 
28,704


Third Quarter 2015
 
 
 
 
 
 
($ in thousands)
 
Gross
 
Tax
 
Net
Net income
 
$
65,839

 
18,843

 
46,996

Components of OCI:
 
 

 
 

 
 

Unrealized gains on investment securities:
 
 

 
 

 
 

Unrealized holding gains during period
 
8,371

 
2,929

 
5,442

Amounts reclassified into net income:
 
 
 
 
 
 
HTM securities
 
(97
)
 
(34
)
 
(63
)
Realized gains on AFS securities
 
(305
)
 
(106
)
 
(199
)
    Total unrealized gains on investment securities
 
7,969

 
2,789

 
5,180

Defined benefit pension and post-retirement plans:
 
 

 
 

 
 

Amounts reclassified into net income:
 
 

 
 

 
 

Net actuarial loss
 
1,709

 
599

 
1,110

    Total defined benefit pension and post-retirement plans
 
1,709

 
599

 
1,110

Other comprehensive income
 
9,678

 
3,388

 
6,290

Comprehensive income
 
$
75,517

 
22,231

 
53,286

Nine Months 2016
 
 
 
 
 
 
($ in thousands)
 
Gross
 
Tax
 
Net
Net income
 
$
169,629

 
50,494

 
119,135

Components of OCI:
 
 

 
 

 
 

Unrealized gains on investment securities:
 
 

 
 

 
 

Unrealized holding gains during period
 
108,420

 
37,947

 
70,473

Non-credit portion of OTTI recognized in OCI
 
(10
)
 
(4
)
 
(6
)
Amounts reclassified into net income:
 
 
 
 
 
 
HTM securities
 
(104
)
 
(36
)
 
(68
)
Realized gains on AFS securities
 
(2,747
)
 
(961
)
 
(1,786
)
    Total unrealized gains on investment securities
 
105,559

 
36,946

 
68,613

Defined benefit pension and post-retirement plans:
 
 

 
 

 
 

Amounts reclassified into net income:
 
 

 
 

 
 

Net actuarial loss
 
4,648

 
1,627

 
3,021

    Total defined benefit pension and post-retirement plans
 
4,648

 
1,627

 
3,021

Other comprehensive income
 
110,207

 
38,573

 
71,634

Comprehensive income
 
$
279,836

 
89,067

 
190,769

Nine Months 2015
 
 
 
 
 
 
($ in thousands)
 
Gross
 
Tax
 
Net
Net income
 
$
168,894

 
48,422

 
120,472

Components of OCI:
 
 

 
 

 
 

Unrealized losses on investment securities:
 
 

 
 

 
 

Unrealized holding losses during period
 
(27,896
)
 
(9,764
)
 
(18,132
)
Amounts reclassified into net income:
 
 
 
 
 
 
HTM securities
 
(543
)
 
(190
)
 
(353
)
Non-credit OTTI
 
357

 
125

 
232

Realized gains on AFS securities
 
(16,778
)
 
(5,872
)
 
(10,906
)
    Total unrealized losses on investment securities
 
(44,860
)
 
(15,701
)
 
(29,159
)
Defined benefit pension and post-retirement plans:
 
 

 
 

 
 

Amounts reclassified into net income:
 
 

 
 

 
 

Net actuarial loss
 
5,127

 
1,795

 
3,332

    Total defined benefit pension and post-retirement plans
 
5,127

 
1,795

 
3,332

Other comprehensive loss
 
(39,733
)
 
(13,906
)
 
(25,827
)
Comprehensive income
 
$
129,161

 
34,516

 
94,645
Schedule of Components of Accumulated Other Comprehensive Income
September 30, 2016
 
 
 
Defined Benefit
Pension and Post-Retirement Plans
 
 
 
 
Net Unrealized Gain on Investment Securities
 
 
Total AOCI
($ in thousands)
 
OTTI
Related
 
HTM
Related
 
All
Other
 
Investments
Subtotal
 
 
Balance, December 31, 2015
 
$
(282
)
 
194

 
45,083

 
44,995

 
(54,420
)
 
(9,425
)
OCI before reclassifications
 
(6
)
 
—

 
70,473

 
70,467

 
—

 
70,467

Amounts reclassified from AOCI
 
—

 
(68
)
 
(1,786
)
 
(1,854
)
 
3,021

 
1,167

Net current period OCI
 
(6
)
 
(68
)
 
68,687

 
68,613

 
3,021

 
71,634

Balance, September 30, 2016
 
$
(288
)
 
126

 
113,770

 
113,608

 
(51,399
)
 
62,209
Schedule of Reclassifications Out Of Accumulated Other Comprehensive Income
 
Quarter ended
September 30,
 
Nine Months ended
September 30,
Affected Line Item in the Unaudited Consolidated Statement of Income
($ in thousands)
2016
 
2015
 
2016
 
2015
OTTI related
 
 
 
 
 
 
 
 
Non-credit OTTI on disposed securities
$
—

 
—

 
—

 
357

Net realized gains
 
—

 
—

 
—

 
357

Income before federal income tax
 
—

 
—

 
—

 
(125
)
Total federal income tax expense
 
—

 
—

 
—

 
232

Net income
HTM related
 
 
 
 
 
 
 
 
Unrealized losses on HTM disposals
73

 
121

 
161

 
258

Net realized gains
Amortization of net unrealized gains on HTM securities
(86
)
 
(218
)
 
(265
)
 
(801
)
Net investment income earned
 
(13
)
 
(97
)
 
(104
)
 
(543
)
Income before federal income tax
 
4

 
34

 
36

 
190

Total federal income tax expense
 
(9
)
 
(63
)
 
(68
)
 
(353
)
Net income
Realized losses (gains) on AFS and OTTI
 
 
 
 
 
 
 
 
Realized losses (gains) on AFS disposals and OTTI
(3,684
)
 
(305
)
 
(2,747
)
 
(16,778
)
Net realized gains
 
(3,684
)
 
(305
)
 
(2,747
)
 
(16,778
)
Income before federal income tax
 
1,289

 
106

 
961

 
5,872

Total federal income tax expense
 
(2,395
)
 
(199
)
 
(1,786
)
 
(10,906
)
Net income
Defined benefit pension and post-retirement life plans
 
 
 
 
 
 
 
 
Net actuarial loss
351

 
371

 
1,009

 
1,114

Loss and loss expense incurred
 
1,264

 
1,338

 
3,639

 
4,013

Policy acquisition costs
Total defined benefit pension and post-retirement life
1,615

 
1,709

 
4,648

 
5,127

Income before federal income tax
 
(565
)
 
(599
)
 
(1,627
)
 
(1,795
)
Total federal income tax expense
 
1,050

 
1,110

 
3,021

 
3,332

Net income
 
 
 
 
 
 
 
 
 
Total reclassifications for the period
$
(1,354
)
 
848

 
1,167

 
(7,695
)
Net income