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Comprehensive Income (Tables)
 9 Months Ended
Sep. 30, 2017
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]  
Schedule of Components of Comprehensive Income-Gross and Net of Tax
Third Quarter 2017
 
 
 
 
 
 
($ in thousands)
 
Gross
 
Tax
 
Net
Net income
 
$
67,315

 
20,597

 
46,718

Components of OCI:
 
 

 
 

 
 

Unrealized gains on investment securities:
 
 

 
 

 
 

Unrealized holding gains during period
 
16,729

 
5,855

 
10,874

Non-credit portion of OTTI recognized in OCI
 
30

 
11

 
19

Amounts reclassified into net income:
 
 
 
 
 
 
HTM securities
 
(54
)
 
(19
)
 
(35
)
Non-credit OTTI
 
38

 
13

 
25

Realized gains on AFS securities
 
(6,760
)
 
(2,366
)
 
(4,394
)
    Total unrealized gains on investment securities
 
9,983

 
3,494

 
6,489

Defined benefit pension and post-retirement plans:
 
 

 
 

 
 

Amounts reclassified into net income:
 
 

 
 

 
 

Net actuarial loss
 
507

 
178

 
329

    Total defined benefit pension and post-retirement plans
 
507

 
178

 
329

Other comprehensive income
 
10,490

 
3,672

 
6,818

Comprehensive income
 
$
77,805

 
24,269

 
53,536

 
 
 
 
 
 
 
 
 
 
 
 
 
 
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

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Nine Months 2017
 
 
 
 
 
 
($ in thousands)
 
Gross
 
Tax
 
Net
Net income
 
$
193,818

 
55,234

 
138,584

Components of OCI:
 
 

 
 

 
 

Unrealized gains on investment securities:
 
 

 
 

 
 

Unrealized holding gains during period
 
78,401

 
27,440

 
50,961

Non-credit portion of OTTI recognized in OCI
 
36

 
13

 
23

Amounts reclassified into net income:
 
 
 
 
 
 
HTM securities
 
(146
)
 
(51
)
 
(95
)
Non-credit OTTI
 
38

 
13

 
25

Realized gains on AFS securities
 
(7,135
)
 
(2,497
)
 
(4,638
)
    Total unrealized gains on investment securities
 
71,194

 
24,918

 
46,276

Defined benefit pension and post-retirement plans:
 
 

 
 

 
 

Amounts reclassified into net income:
 
 

 
 
 
 
Net actuarial loss
 
1,522

 
533

 
989

    Total defined benefit pension and post-retirement plans
 
1,522

 
533

 
989

Other comprehensive income
 
72,716

 
25,451

 
47,265

Comprehensive income
 
$
266,534

 
80,685

 
185,849

 
 
 
 
 
 
 
 
 
 
 
 
 
 
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
Schedule of Components of Accumulated Other Comprehensive Income
September 30, 2017
 
 
 
Defined Benefit
Pension and Post-Retirement Plans
 
 
 
 
Net Unrealized Gains on Investment Securities
 
 
Total AOCI
($ in thousands)
 
OTTI
Related
 
HTM
Related
 
All
Other
 
Investments
Subtotal
 
 
Balance, December 31, 2016
 
$
(150
)
 
102

 
42,170

 
42,122

 
(58,072
)
 
(15,950
)
OCI before reclassifications
 
23

 
—

 
50,961

 
50,984

 
—

 
50,984

Amounts reclassified from AOCI
 
25

 
(95
)
 
(4,638
)
 
(4,708
)
 
989

 
(3,719
)
Net current period OCI
 
48

 
(95
)
 
46,323

 
46,276

 
989

 
47,265

Balance, September 30, 2017
 
$
(102
)
 
7

 
88,493

 
88,398

 
(57,083
)
 
31,315
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)
2017
 
2016
 
2017
 
2016
OTTI related
 
 
 
 
 
 
 
 
Non-credit OTTI on disposed securities
$
38

 
—

 
38

 
—

Net realized gains
 
38

 
—

 
38

 
—

Income before federal income tax
 
(13
)
 
—

 
(13
)
 
—

Total federal income tax expense
 
25

 
—

 
25

 
—

Net income
HTM related
 
 
 
 
 
 
 
 
Unrealized losses on HTM disposals
11

 
73

 
41

 
161

Net realized gains
Amortization of net unrealized gains on HTM securities
(65
)
 
(86
)
 
(187
)
 
(265
)
Net investment income earned
 
(54
)
 
(13
)
 
(146
)
 
(104
)
Income before federal income tax
 
19

 
4

 
51

 
36

Total federal income tax expense
 
(35
)
 
(9
)
 
(95
)
 
(68
)
Net income
Realized gains on AFS and OTTI
 
 
 
 
 
 
 
 
Realized gains on AFS disposals and OTTI
(6,760
)
 
(3,684
)
 
(7,135
)
 
(2,747
)
Net realized gains
 
(6,760
)
 
(3,684
)
 
(7,135
)
 
(2,747
)
Income before federal income tax
 
2,366

 
1,289

 
2,497

 
961

Total federal income tax expense
 
(4,394
)
 
(2,395
)
 
(4,638
)
 
(1,786
)
Net income
Defined benefit pension and post-retirement life plans
 
 
 
 
 
 
 
 
Net actuarial loss
110

 
351

 
331

 
1,009

Losses and loss expenses incurred
 
397

 
1,264

 
1,191

 
3,639

Policy acquisition costs
Total defined benefit pension and post-retirement life
507

 
1,615

 
1,522

 
4,648

Income before federal income tax
 
(178
)
 
(565
)
 
(533
)
 
(1,627
)
Total federal income tax expense
 
329

 
1,050

 
989

 
3,021

Net income
 
 
 
 
 
 
 
 
 
Total reclassifications for the period
$
(4,075
)
 
(1,354
)
 
(3,719
)
 
1,167

Net income