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Comprehensive Income (Tables) | 3 Months Ended
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Mar. 31, 2012
Comprehensive Income Note[Abstract] |
Components of Comprehensive Income-Gross and Net of Tax |
First Quarter 2012 |  |  |  |  |  |
($ in thousands) |  | Gross |  | Tax |  | Net
Net income | $ | 23,191 |  | 5,098 |  | 18,093
Components of OCI: |  |  |  |  |  |
Unrealized gains on securities: |  |  |  |  |  |
Unrealized holding gains during the period |  | 19,804 |  | 6,931 |  | 12,873
Portion of OTTI recognized in OCI |  | 367 |  | 129 |  | 238
Amortization of net unrealized gains on HTM securities |  | (794) |  | (278) |  | (516)
Reclassification adjustment for gains included in net |  |  |  |  |  |
income |  | (4,359) |  | (1,526) |  | (2,833)
Net unrealized gains |  | 15,018 |  | 5,256 |  | 9,762
Defined benefit pension and post-retirement plans: |  |  |  |  |  |
Reversal of amortization items: |  |  |  |  |  |
Net actuarial loss |  | 1,390 |  | 487 |  | 903
Prior service cost |  | 38 |  | 13 |  | 25
Defined benefit pension and post-retirement plans |  | 1,428 |  | 500 |  | 928
Comprehensive income | $ | 39,637 |  | 10,854 |  | 28,783
First Quarter 2011 |  |  |  |  |  |
($ in thousands) |  | Gross |  | Tax |  | Net
Net income | $ | 26,158 |  | 5,658 |  | 20,500
Components of OCI: |  |  |  |  |  |
Unrealized losses on securities: |  |  |  |  |  |
Unrealized holding losses during the period |  | (933) |  | (327) |  | (606)
Portion of OTTI recognized in OCI |  | 180 |  | 63 |  | 117
Amortization of net unrealized gains on HTM securities |  | (1,175) |  | (411) |  | (764)
Reclassification adjustment for gains included in net |  |  |  |  |  |
income |  | (5,749) |  | (2,012) |  | (3,737)
Net unrealized losses |  | (7,677) |  | (2,687) |  | (4,990)
Defined benefit pension and post-retirement plans: |  |  |  |  |  |
Reversal of amortization items: |  |  |  |  |  |
Net actuarial loss |  | 1,105 |  | 387 |  | 718
Prior service cost |  | 37 |  | 13 |  | 24
Defined benefit pension and post-retirement plans |  | 1,142 |  | 400 |  | 742
Comprehensive income | $ | 19,623 |  | 3,371 |  | 16,252
Components of Accumulated Other Comprehensive Income |
March 31, 2012 |  |  |  | Defined |  |
|  | Net Unrealized Gain (Loss) |  | Benefit |  |
|  | OTTI |  | HTM |  | All |  | Pension and Post-Retirement |  | Total Accumulated
($ in thousands) |  | Related |  | Related |  | Other |  | Plans |  | OCI
Balance, December 31, 2011 | $ | (3,500) |  | 4,622 |  | 96,125 |  | (54,953) |  | 42,294
Changes in component during period |  | 238 |  | (585) |  | 10,109 |  | 928 |  | 10,690
Balance, March 31, 2012 | $ | (3,262) |  | 4,037 |  | 106,234 |  | (54,025) |  | 52,984

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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 -Topic 220 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 1 -Section 45 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e526-108580 + Details
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