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Retirement Plans (Table) | 9 Months Ended
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Sep. 30, 2012
Compensation and Retirement Disclosure [Abstract] |
Retirement Income Plan and Retirement Life Plan |
|  | Retirement Income Plan Quarter ended September 30, |  | Retirement Life Plan Quarter ended September 30,
($ in thousands) |  | 2012 |  | 2011 |  | 2012 |  | 2011
Components of Net Periodic Benefit Cost: |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 2,154 |  |  | 1,894 |  |  | — |  |  | — |
Interest cost |  | 3,230 |  |  | 3,087 |  |  | 73 |  |  | 77 |
Expected return on plan assets |  | (3,547 | ) |  | (3,482 | ) |  | — |  |  | — |
Amortization of unrecognized prior service cost |  | 38 |  |  | 38 |  |  | — |  |  | — |
Amortization of unrecognized net loss |  | 1,383 |  |  | 1,039 |  |  | 8 |  |  | 4 |
Net periodic cost |  | $ | 3,258 |  |  | 2,576 |  |  | 81 |  |  | 81 |
|  | Retirement Income Plan Nine Months ended September 30, |  | Retirement Life Plan Nine Months ended September 30,
($ in thousands) |  | 2012 |  | 2011 |  | 2012 |  | 2011
Components of Net Periodic Benefit Cost: |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 6,462 |  |  | 6,241 |  |  | — |  |  | — |
Interest cost |  | 9,690 |  |  | 9,397 |  |  | 221 |  |  | 230 |
Expected return on plan assets |  | (10,641 | ) |  | (10,445 | ) |  | — |  |  | — |
Amortization of unrecognized prior service cost |  | 113 |  |  | 113 |  |  | — |  |  | — |
Amortization of unrecognized net loss |  | 4,149 |  |  | 3,239 |  |  | 23 |  |  | 13 |
Net periodic cost |  | $ | 9,773 |  |  | 8,545 |  |  | 244 |  |  | 243 |
Weighted-Average Expense Assumptions |
Weighted-Average Expense Assumptions for the years ended December 31: |  |  |  |  |  |  |  |  |  |
Discount rate |  | 5.16 | % |  | 5.55 |  | 5.16 | % |  | 5.55
Expected return on plan assets |  | 7.75 | % |  | 8.00 |  | — |  |  | —
Rate of compensation increase |  | 4.00 | % |  | 4.00 |  | — |  |  | —

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- Definition Tabular disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation and net benefit cost, including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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