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Comprehensive Income (Tables) | 9 Months Ended
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Sep. 30, 2014
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] |
Schedule of Components of Comprehensive Income-Gross and Net of Tax |
Third Quarter 2014 |  |  |  |  |  |
($ in thousands) |  | Gross |  | Tax |  | Net
Net income |  | $ | 75,326 |  |  | 22,164 |  |  | 53,162 |
Components of OCI: |  |  |  |  |  |  |  |  |
Unrealized losses on investment securities: |  |  |  |  |  |  |  |  |
Unrealized holding losses during the period |  | (13,831 | ) |  | (4,843 | ) |  | (8,988 | )
Amounts reclassified into net income: |  |  |  |  |  |
HTM securities |  | (373 | ) |  | (130 | ) |  | (243 | )
Non-credit OTTI |  | 1,200 |  |  | 420 |  |  | 780 |
Realized gains on AFS securities |  | (16,435 | ) |  | (5,752 | ) |  | (10,683 | )
Net unrealized losses |  | (29,439 | ) |  | (10,305 | ) |  | (19,134 | )
Defined benefit pension and post-retirement plans: |  |  |  |  |  |  |  |  |
Amounts reclassified into net income: |  |  |  |  |  |  |  |  |
Net actuarial loss |  | 381 |  |  | 134 |  |  | 247 |
Defined benefit pension and post-retirement plans |  | 381 |  |  | 134 |  |  | 247 |
Other comprehensive loss |  | (29,058 | ) |  | (10,171 | ) |  | (18,887 | )
Comprehensive income |  | $ | 46,268 |  |  | 11,993 |  |  | 34,275 |
Third Quarter 2013 |  |  |  |  |  |
($ in thousands) |  | Gross |  | Tax |  | Net
Net income |  | $ | 44,485 |  |  | 11,832 |  |  | 32,653 |
Components of OCI: |  |  |  |  |  |  |  |  |
Unrealized losses on investment securities: |  |  |  |  |  |  |  |  |
Unrealized holding gains during the period |  | 9,820 |  |  | 3,437 |  |  | 6,383 |
Amounts reclassified into net income: |  |  |  |  |  |
HTM securities |  | (472 | ) |  | (165 | ) |  | (307 | )
Non-credit OTTI |  | 1 |  |  | — |  |  | 1 |
Realized gains on AFS securities |  | (13,516 | ) |  | (4,731 | ) |  | (8,785 | )
Net unrealized losses |  | (4,167 | ) |  | (1,459 | ) |  | (2,708 | )
Defined benefit pension and post-retirement plans: |  |  |  |  |  |  |  |  |
Amounts reclassified into net income: |  |  |  |  |  |  |  |  |
Net actuarial loss |  | 790 |  |  | 277 |  |  | 513 |
Defined benefit pension and post-retirement plans |  | 790 |  |  | 277 |  |  | 513 |
Other comprehensive loss |  | (3,377 | ) |  | (1,182 | ) |  | (2,195 | )
Comprehensive loss |  | $ | 41,108 |  |  | 10,650 |  |  | 30,458 |
Nine Months 2014 |  |  |  |  |  |
($ in thousands) |  | Gross |  | Tax |  | Net
Net income |  | $ | 139,931 |  |  | 39,454 |  |  | 100,477 |
Components of OCI: |  |  |  |  |  |  |  |  |
Unrealized gains on investment securities: |  |  |  |  |  |  |  |  |
Unrealized holding gains during the period |  | 64,255 |  |  | 22,488 |  |  | 41,767 |
Amounts reclassified into net income: |  |  |  |  |  |
HTM securities |  | (1,050 | ) |  | (367 | ) |  | (683 | )
Non-credit OTTI |  | 1,669 |  |  | 584 |  |  | 1,085 |
Realized gains on AFS securities |  | (28,672 | ) |  | (10,035 | ) |  | (18,637 | )
Net unrealized gains |  | 36,202 |  |  | 12,670 |  |  | 23,532 |
Defined benefit pension and post-retirement plans: |  |  |  |  |  |  |  |  |
Amounts reclassified into net income: |  |  |  |  |  |  |  |  |
Net actuarial loss |  | 1,142 |  |  | 400 |  |  | 742 |
Defined benefit pension and post-retirement plans |  | 1,142 |  |  | 400 |  |  | 742 |
Other comprehensive income |  | 37,344 |  |  | 13,070 |  |  | 24,274 |
Comprehensive income |  | $ | 177,275 |  |  | 52,524 |  |  | 124,751 |
Nine Months 2013 |  |  |  |  |  |
($ in thousands) |  | Gross |  | Tax |  | Net
Net income |  | $ | 108,019 |  |  | 26,936 |  |  | 81,083 |
Components of OCI: |  |  |  |  |  |  |  |  |
Unrealized losses on investment securities: |  |  |  |  |  |  |  |  |
Unrealized holding losses during the period |  | (77,810 | ) |  | (27,234 | ) |  | (50,576 | )
Non-credit OTTI recognized in OCI |  | 77 |  |  | 27 |  |  | 50 |
Amounts reclassified into net income: |  |  |  |  |  |
HTM securities |  | (1,803 | ) |  | (631 | ) |  | (1,172 | )
Non-credit OTTI |  | 14 |  |  | 5 |  |  | 9 |
Realized gains on AFS securities |  | (24,780 | ) |  | (8,673 | ) |  | (16,107 | )
Net unrealized losses |  | (104,302 | ) |  | (36,506 | ) |  | (67,796 | )
Defined benefit pension and post-retirement plans: |  |  |  |  |  |  |  |  |
Net actuarial gains |  | 44,000 |  |  | 15,400 |  |  | 28,600 |
Amounts reclassified into net income: |  |  |  |  |  |  |  |  |
Net actuarial loss |  | 3,419 |  |  | 1,197 |  |  | 2,222 |
Prior service cost |  | 10 |  |  | 4 |  |  | 6 |
Curtailment expense |  | 16 |  |  | 5 |  |  | 11 |
Defined benefit pension and post-retirement plans |  | 47,445 |  |  | 16,606 |  |  | 30,839 |
Other comprehensive loss |  | (56,857 | ) |  | (19,900 | ) |  | (36,957 | )
Comprehensive income |  | $ | 51,162 |  |  | 7,036 |  |  | 44,126 |
Schedule of Components of Accumulated Other Comprehensive Income |
September 30, 2014 |  | Net Unrealized (Loss) Gain on Investment Securities |  |  |  |
($ in thousands) |  | OTTI Related |  | HTM Related |  | All Other |  | Investments Subtotal |  | Defined Benefit Pension and Post-Retirement Plans |  | Total AOCI
Balance, December 31, 2013 |  | $ | (1,599 | ) |  | 1,467 |  |  | 51,635 |  |  | 51,503 |  |  | (26,652 | ) |  | 24,851 |
OCI before reclassifications |  | — |  |  | — |  |  | 41,767 |  |  | 41,767 |  |  | — |  |  | 41,767 |
Amounts reclassified from AOCI |  | 1,085 |  |  | (683 | ) |  | (18,637 | ) |  | (18,235 | ) |  | 742 |  |  | (17,493 | )
Net current period OCI |  | 1,085 |  |  | (683 | ) |  | 23,130 |  |  | 23,532 |  |  | 742 |  |  | 24,274 |
Balance, September 30, 2014 |  | $ | (514 | ) |  | 784 |  |  | 74,765 |  |  | 75,035 |  |  | (25,910 | ) |  | 49,125 |
Schedule of Reclassifications Out Of Accumulated Other Comprehensive Income |
| Quarter ended September 30, |  | Nine Months ended September 30, |
($ in thousands) | 2014 |  | 2013 |  | 2014 |  | 2013 | Affected Line Item in the Unaudited Consolidated Statement of Income
OTTI related |  |  |  |  |  |  |  |
Amortization of non-credit OTTI losses on HTM securities | — |  |  | 1 |  |  | — |  |  | 14 |  | Net investment income earned
Non-credit OTTI on disposed securities | 1,200 |  |  | — |  |  | 1,669 |  |  | — |  | Net realized gains
| 1,200 |  |  | 1 |  |  | 1,669 |  |  | 14 |  | Income from continuing operations, before federal income tax
| (420 | ) |  | — |  |  | (584 | ) |  | (5 | ) | Total federal income tax expense
| 780 |  |  | 1 |  |  | 1,085 |  |  | 9 |  | Net income
HTM related |  |  |  |  |  |  |  |
Unrealized losses (gains) on HTM disposals | 12 |  |  | (19 | ) |  | 87 |  |  | (170 | ) | Net realized gains
Amortization of net unrealized gains on HTM securities | (385 | ) |  | (453 | ) |  | (1,137 | ) |  | (1,633 | ) | Net investment income earned
| (373 | ) |  | (472 | ) |  | (1,050 | ) |  | (1,803 | ) | Income from continuing operations, before federal income tax
| 130 |  |  | 165 |  |  | 367 |  |  | 631 |  | Total federal income tax expense
| (243 | ) |  | (307 | ) |  | (683 | ) |  | (1,172 | ) | Net income
Realized gains and losses on AFS and OTTI |  |  |  |  |  |  |  |
Realized gains on AFS disposals and OTTI | (16,435 | ) |  | (13,516 | ) |  | (28,672 | ) |  | (24,780 | ) | Net realized gains
| (16,435 | ) |  | (13,516 | ) |  | (28,672 | ) |  | (24,780 | ) | Income from continuing operations, before federal income tax
| 5,752 |  |  | 4,731 |  |  | 10,035 |  |  | 8,673 |  | Total federal income tax expense
| (10,683 | ) |  | (8,785 | ) |  | (18,637 | ) |  | (16,107 | ) | Net income
Defined benefit pension and post-retirement life plans |  |  |  |  |  |  |  |
Net actuarial loss | 88 |  |  | 159 |  |  | 263 |  |  | 717 |  | Loss and loss expense incurred
| 293 |  |  | 631 |  |  | 879 |  |  | 2,702 |  | Policy acquisition costs
| 381 |  |  | 790 |  |  | 1,142 |  |  | 3,419 |  | Income from continuing operations, before federal income tax
Prior service cost | — |  |  | — |  |  | — |  |  | 7 |  | Loss and loss adjustment expenses
| — |  |  | — |  |  | — |  |  | 3 |  | Policy acquisition costs
| — |  |  | — |  |  | — |  |  | 10 |  | Income from continuing operations, before federal income tax
Curtailment expense | — |  |  | — |  |  | — |  |  | 16 |  | Policy acquisition costs
| — |  |  | — |  |  | — |  |  | 16 |  | Income from continuing operations, before federal income tax
Total defined benefit pension and post-retirement life | 381 |  |  | 790 |  |  | 1,142 |  |  | 3,445 |  | Income from continuing operations, before federal income tax
| (134 | ) |  | (277 | ) |  | (400 | ) |  | (1,206 | ) | Total federal income tax expense
| 247 |  |  | 513 |  |  | 742 |  |  | 2,239 |  | Net income
Total reclassifications for the period | (9,899 | ) |  | (8,578 | ) |  | (17,493 | ) |  | (15,031 | ) | Net income

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