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Comprehensive Income (Tables) | 6 Months Ended
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Jun. 30, 2013
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] |
Components of Comprehensive Income-Gross and Net of Tax |
Six Months 2013 |  |  |  |  |  |
($ in thousands) |  | Gross |  | Tax |  | Net
Net income |  | $ | 63,534 |  |  | 15,104 |  |  | 48,430 |
Components of OCI: |  |  |  |  |  |  |  |  |
Unrealized losses on investment securities: |  |  |  |  |  |  |  |  |
Unrealized holding losses during the period |  | (87,630 | ) |  | (30,671 | ) |  | (56,959 | )
Non-credit OTTI recognized in OCI |  | 77 |  |  | 27 |  |  | 50 |
Amounts reclassified into net income: |  |  |  |  |  |
HTM securities |  | (1,331 | ) |  | (466 | ) |  | (865 | )
Non-credit OTTI |  | 13 |  |  | 5 |  |  | 8 |
Realized gains on AFS securities |  | (11,264 | ) |  | (3,942 | ) |  | (7,322 | )
Net unrealized losses |  | (100,135 | ) |  | (35,047 | ) |  | (65,088 | )
Defined benefit pension and post-retirement plans: |  |  |  |  |  |  |  |  |
Net actuarial gain |  | 44,000 |  |  | 15,400 |  |  | 28,600 |
Amounts reclassified into net income: |  |  |  |  |  |  |  |  |
Net actuarial loss |  | 2,629 |  |  | 920 |  |  | 1,709 |
Prior service cost |  | 10 |  |  | 4 |  |  | 6 |
Curtailment expense |  | 16 |  |  | 5 |  |  | 11 |
Defined benefit pension and post-retirement plans |  | 46,655 |  |  | 16,329 |  |  | 30,326 |
Other comprehensive loss |  | (53,480 | ) |  | (18,718 | ) |  | (34,762 | )
Comprehensive income |  | $ | 10,054 |  |  | (3,614 | ) |  | 13,668 |
Six Months 2012 |  |  |  |  |  |
($ in thousands) |  | Gross |  | Tax |  | Net
Net income |  | $ | 22,499 |  |  | 4,118 |  |  | 18,381 |
Components of OCI: |  |  |  |  |  |  |  |  |
Unrealized gains on investment securities: |  |  |  |  |  |  |  |  |
Unrealized holding gains during the period |  | 27,653 |  |  | 9,679 |  |  | 17,974 |
Non-credit OTTI recognized in OCI |  | 218 |  |  | 76 |  |  | 142 |
Amounts reclassified into net income: |  |  |  |  |  |
HTM securities |  | (1,565 | ) |  | (548 | ) |  | (1,017 | )
Non-credit OTTI |  | 263 |  |  | 92 |  |  | 171 |
Realized gains on AFS securities |  | (4,488 | ) |  | (1,571 | ) |  | (2,917 | )
Net unrealized gains |  | 22,081 |  |  | 7,728 |  |  | 14,353 |
Defined benefit pension and post-retirement plans: |  |  |  |  |  |  |  |  |
Amounts reclassified into net income: |  |  |  |  |  |  |  |  |
Net actuarial loss |  | 2,781 |  |  | 973 |  |  | 1,808 |
Prior service cost |  | 75 |  |  | 26 |  |  | 49 |
Defined benefit pension and post-retirement plans |  | 2,856 |  |  | 999 |  |  | 1,857 |
Other comprehensive income |  | 24,937 |  |  | 8,727 |  |  | 16,210 |
Comprehensive income |  | $ | 47,436 |  |  | 12,845 |  |  | 34,591 |
Second Quarter 2013 |  |  |  |  |  |
($ in thousands) |  | Gross |  | Tax |  | Net
Net income |  | $ | 36,201 |  |  | 9,079 |  |  | 27,122 |
Components of OCI: |  |  |  |  |  |  |  |  |
Unrealized losses on investment securities: |  |  |  |  |  |  |  |  |
Unrealized holding losses during the period |  | (91,314 | ) |  | (31,961 | ) |  | (59,353 | )
Non-credit OTTI recognized in OCI |  | 47 |  |  | 16 |  |  | 31 |
Amounts reclassified into net income: |  |  |  |  |  |
HTM securities |  | (614 | ) |  | (215 | ) |  | (399 | )
Non-credit OTTI |  | 6 |  |  | 3 |  |  | 3 |
Realized gains on AFS securities |  | (5,288 | ) |  | (1,850 | ) |  | (3,438 | )
Net unrealized losses |  | (97,163 | ) |  | (34,007 | ) |  | (63,156 | )
Amounts reclassified into net income: |  |  |  |  |  |  |  |  |
Net actuarial loss |  | 789 |  |  | 276 |  |  | 513 |
Defined benefit pension and post-retirement plans |  | 789 |  |  | 276 |  |  | 513 |
Other comprehensive loss |  | (96,374 | ) |  | (33,731 | ) |  | (62,643 | )
Comprehensive loss |  | $ | (60,173 | ) |  | (24,652 | ) |  | (35,521 | )
Second Quarter 2012 |  |  |  |  |  |
($ in thousands) |  | Gross |  | Tax |  | Net
Net income |  | $ | (692 | ) |  | (980 | ) |  | 288 |
Components of OCI: |  |  |  |  |  |  |  |  |
Unrealized gains on investment securities: |  |  |  |  |  |  |  |  |
Unrealized holding gains during the period |  | 7,849 |  |  | 2,748 |  |  | 5,101 |
Non-credit OTTI recognized in OCI |  | 54 |  |  | 19 |  |  | 35 |
Amounts reclassified into net income: |  |  |  |  |  |
HTM securities |  | (701 | ) |  | (245 | ) |  | (456 | )
Non-credit OTTI |  | 60 |  |  | 21 |  |  | 39 |
Realized gains on AFS securities |  | (199 | ) |  | (71 | ) |  | (128 | )
Net unrealized gains |  | 7,063 |  |  | 2,472 |  |  | 4,591 |
Defined benefit pension and post-retirement plans: |  |  |  |  |  |  |  |  |
Amounts reclassified into net income: |  |  |  |  |  |  |  |  |
Net actuarial loss |  | 1,391 |  |  | 486 |  |  | 905 |
Prior service cost |  | 37 |  |  | 13 |  |  | 24 |
Defined benefit pension and post-retirement plans |  | 1,428 |  |  | 499 |  |  | 929 |
Other comprehensive income |  | 8,491 |  |  | 2,971 |  |  | 5,520 |
Comprehensive income |  | $ | 7,799 |  |  | 1,991 |  |  | 5,808 |
Components of Accumulated Other Comprehensive Income |
June 30, 2013 |  | 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, 2012 |  | $ | (1,658 | ) |  | 2,594 |  |  | 121,391 |  |  | 122,327 |  |  | (68,287 | ) |  | 54,040 |
OCI before reclassifications |  | 50 |  |  | (27 | ) |  | (56,932 | ) |  | (56,909 | ) |  | 28,600 |  |  | (28,309 | )
Amounts reclassified from AOCI |  | 8 |  |  | (865 | ) |  | (7,322 | ) |  | (8,179 | ) |  | 1,726 |  |  | (6,453 | )
Net current period OCI |  | 58 |  |  | (892 | ) |  | (64,254 | ) |  | (65,088 | ) |  | 30,326 |  |  | (34,762 | )
Balance, June 30, 2013 |  | $ | (1,600 | ) |  | 1,702 |  |  | 57,137 |  |  | 57,239 |  |  | (37,961 | ) |  | 19,278 |
Reclassification Out Of Accumulated Other Comprehensive Income |
| Amount Reclassified from AOCI |  | Affected Line Item in the Unaudited Consolidated Statement of Income
($ in thousands) | Quarter ended June 30, 2013 |  | Six Months ended June 30, 2013 |
OTTI related |  |  |  |  |
Amortization of non-credit OTTI losses on HTM securities |  |  |  |  |
| $ | 6 |  |  | 13 |  |  | Net investment income earned
| 6 |  |  | 13 |  |  | Income (loss) from continuing operations, before federal income tax
| (3 | ) |  | (5 | ) |  | Total federal income tax expense (benefit)
| 3 |  |  | 8 |  |  | Net income
HTM related |  |  |  |  |
Unrealized gains and losses on HTM disposals | (70 | ) |  | (151 | ) |  | Net realized investment gains
Amortization of net unrealized gains on HTM securities | (544 | ) |  | (1,180 | ) |  | Net investment income earned
| (614 | ) |  | (1,331 | ) |  | Income (loss) from continuing operations, before federal income tax
| 215 |  |  | 466 |  |  | Total federal income tax expense (benefit)
| (399 | ) |  | (865 | ) |  | Net income
Realized gains and losses on AFS |  |  |  |  |
Realized gains and losses on AFS disposals | (5,288 | ) |  | (11,264 | ) |  | Net realized investments gains
| (5,288 | ) |  | (11,264 | ) |  | Income (loss) from continuing operations, before federal income tax
| 1,850 |  |  | 3,942 |  |  | Total federal income tax expense (benefit)
| (3,438 | ) |  | (7,322 | ) |  | Net income
Defined benefit pension and post-retirement life plans |  |  |  |  |
Net actuarial loss | 158 |  |  | 558 |  |  | Loss and loss expense incurred
| 631 |  |  | 2,071 |  |  | Policy acquisition costs
| 789 |  |  | 2,629 |  |  | Income (loss) from continuing operations, before federal income tax
Prior service cost | — |  |  | 7 |  |  | Loss and loss expense incurred
| — |  |  | 3 |  |  | Policy acquisition costs
| — |  |  | 10 |  |  | Income (loss) from continuing operations, before federal income tax
Curtailment expense | — |  |  | 16 |  |  | Policy acquisition costs
| — |  |  | 16 |  |  | Income (loss) from continuing operations, before federal income tax
Total defined benefit pension and post-retirement life | 789 |  |  | 2,655 |  |  | Income (loss) from continuing operations, before federal income tax
| (276 | ) |  | (929 | ) |  | Total federal income tax expense (benefit)
| 513 |  |  | 1,726 |  |  | Net income
Total reclassifications for the period | $ | (3,321 | ) |  | $ | (6,453 | ) |  | Net income

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669686-108580 + Details
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- Definition Tabular disclosure of components of comprehensive income (loss) including, but not limited to: (a) foreign currency translation adjustments; (b) gains (losses) on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (c) gains (losses) on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (d) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (e) unrealized holding gains (losses) on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (f) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (g) the net gain (loss) and net prior service cost or credit for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e526-108580 + Details
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