XML 41 R31.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Employee Benefits (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2017
Retirement Benefits [Abstract] |
Components of Net Periodic Pension Cost and Other Changes in Plan Assets and Benefit | The following table summarizes the components of net periodic pension cost for the periods presented:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(dollars in thousands) | 2017 |  | 2016 |  | 2017 |  | 2016
Components of Net Periodic Pension Cost |  |  |  |  |  |  |
Service cost—benefits earned during the period | $ | — |  |  | $ | (6 | ) |  | $ | — |  |  | $ | 469 |
Interest cost on projected benefit obligation | 1,025 |  |  | 1,099 |  |  | 3,075 |  |  | 3,200 |
Expected return on plan assets | (1,582 | ) |  | (1,444 | ) |  | (4,746 | ) |  | (4,337 | )
Amortization of prior service credit | 475 |  |  | 29 |  |  | 1,424 |  |  | (41 | )
Recognized net actuarial loss | — |  |  | 638 |  |  | — |  |  | 1,708 |
Net Periodic Pension Expense | $ | (82 | ) |  | $ | 316 |  |  | $ | (247 | ) |  | $ | 999 |

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2439-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2417-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2410-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=77993564&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration