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v2.3.0.11

Employee Benefit Plans (Tables) | 6 Months Ended
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Jun. 30, 2011
Employee Benefit Plans |
Components Of Pension Expense |
|  | Three months ended June 30 |  |  | Six months ended June 30, |
|  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |
Service cost |  | $ | 4,062 |  |  | $ | 3,667 |  |  | $ | 6,633 |  |  | $ | 6,671 |
Interest cost |  |  | 7,398 |  |  |  | 7,317 |  |  |  | 11,905 |  |  |  | 12,546 |
Expected return on assets |  |  | (8,817 | ) |  |  | (9,497 | ) |  |  | (14,352 | ) |  |  | (16,018 | )
Amortization of prior service cost |  |  | 66 |  |  |  | 68 |  |  |  | 105 |  |  |  | 115 |
Amortization of net actuarial loss |  |  | 1,977 |  |  |  | 1,155 |  |  |  | 3,190 |  |  |  | 2,080 |
Total pension expense |  | $ | 4,686 |  |  | $ | 2,710 |  |  | $ | 7,481 |  |  | $ | 5,394 |

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- Definition This element may be used to capture the entire disclosure for an employer that sponsors one or more defined benefit pension plans or one or more other defined benefit postretirement plans, of certain information, 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 Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5, 6, 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 4, 7, 16, 20, 21 + Details
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