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Pension Plan (Tables) | 6 Months Ended
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Jun. 30, 2011
Pension Plan [Abstract] |
Components Of Net Periodic Benefit Expense |
(in thousands) |  | Three months ended June 30, |  |  | Six months ended June 30, |
|  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |
Service cost |  | $ | 1,139 |  |  | $ | 918 |  |  | $ | 2,278 |  |  | $ | 1,836 |
Interest cost |  |  | 992 |  |  |  | 896 |  |  |  | 1,984 |  |  |  | 1,792 |
Expected return on plan assets |  |  | (1,886 | ) |  |  | (1,457 | ) |  |  | (3,772 | ) |  |  | (2,914 | )
Amortization of prior service cost |  |  | 5 |  |  |  | 5 |  |  |  | 10 |  |  |  | 10 |
Recognized net actuarial loss |  |  | 352 |  |  |  | 270 |  |  |  | 705 |  |  |  | 540 |
Benefit expense |  | $ | 602 |  |  | $ | 632 |  |  | $ | 1,205 |  |  | $ | 1,264 |

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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 -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
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