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Retirement Plans (Tables) | 3 Months Ended
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Mar. 31, 2016
Pension plan |
Defined Benefit Plan Disclosure [Line Items] |
Components of net periodic pension cost | The expected total pension and retirement expense for the Benefit Plan was as follows:
|  | Three Months Ended
($ in thousands) |  | March 31, 2016 |  | March 31, 2015
Cost components: |  |  |  |
Service cost-benefits earned during the period |  | $ | (56 | ) |  | $ | (66 | )
Interest cost on projected benefit obligation |  | (102 | ) |  | (117 | )
Expected return on plan assets |  | 129 |  |  | 154 |
Net amortization and deferral |  | (46 | ) |  | (70 | )
Total net periodic pension cost |  | $ | (75 | ) |  | $ | (99 | )
SERP |
Defined Benefit Plan Disclosure [Line Items] |
Components of net periodic pension cost | The pension and retirement expense for the SERP was as follows:
|  | Three Months Ended
($ in thousands) |  | March 31, 2016 |  | March 31, 2015
Cost components: |  |  |  |
Interest cost on projected benefit obligation |  | (81 | ) |  | (69 | )
Net amortization and deferral |  | (86 | ) |  | (84 | )
Total net periodic pension cost |  | $ | (167 | ) |  | $ | (153 | )

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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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