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Retirement Plans (Table) | 3 Months Ended
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Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract] |
Schedule of Components Of Net Periodic Benefit Cost And Other Amounts Recognized In Other Comprehensive Income |
|  | Retirement Income Plan Quarter ended March 31, |  | Retirement Life Plan Quarter ended March 31,
($ in thousands) |  | 2015 |  | 2014 |  | 2015 |  | 2014
Components of Net Periodic Benefit Cost: |  |  |  |  |  |  |  |  |  |  |  |
Net Periodic Benefit Cost: |  |  |  |  |  |  |  |
Service cost |  | $ | 1,964 |  |  | 1,627 |  |  | — |  |  | — |
Interest cost |  | 3,502 |  |  | 3,254 |  |  | 63 |  |  | 73 |
Expected return on plan assets |  | (3,991 | ) |  | (3,919 | ) |  | — |  |  | — |
Amortization of unrecognized net actuarial loss |  | 1,695 |  |  | 367 |  |  | 14 |  |  | 13 |
Total net periodic cost |  | $ | 3,170 |  |  | 1,329 |  |  | 77 |  |  | 86 |
Schedule Of Weighted-Average Expense Assumptions |
|  | Retirement Income Plan Quarter ended March 31, |  | Retirement Life Plan Quarter ended March 31,
|  | 2015 |  | 2014 |  | 2015 |  | 2014
Weighted-Average Expense Assumptions: |  |  |  |  |  |  |  |
Discount rate |  | 4.29 | % |  | 5.16 |  | 4.08 | % |  | 4.85
Expected return on plan assets |  | 6.27 |  |  | 6.92 |  | — |  |  | —
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=58740216&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=58740216&loc=d3e1928-114920 + Details
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