XML 31 R30.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Employee Benefit Plans (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] |
Schedule of Net Benefit Costs [Table Text Block] | The net pension and postretirement benefit costs that have been recognized during the stated periods are shown in the following table:
| Pension | Postretirement
| Three Months Ended March 31, |  | Three Months Ended March 31,
| 2012 |  | 2011 |  | 2012 |  | 2011
Components of Net Periodic Benefit Cost |  |  |  |  |  |  |
Service cost | $ | 1,940 |  |  | $ | 1,695 |  |  | $ | 210 |  |  | $ | 182 |
Interest cost | 3,989 |  |  | 4,522 |  |  | 223 |  |  | 236 |
Expected return on plan assets | (5,879 | ) |  | (6,455 | ) |  | — |  |  | — |
Amortization of prior service cost | 302 |  |  | 340 |  |  | 6 |  |  | 22 |
Amortization of losses | 4,056 |  |  | 2,593 |  |  | 144 |  |  | 66 |
Net periodic benefit cost | $ | 4,408 |  |  | $ | 2,695 |  |  | $ | 583 |  |  | $ | 506 |

X
- Details
Name: | us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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 -Topic 715 -SubTopic 20 -Publisher FASB -Number -Article -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration