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Employee benefit plans (Tables) | 9 Months Ended
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Sep. 30, 2011
Employee benefit plans [Abstract] |
Employee benefit plans Table |
The Company has noncontributory defined benefit pension plans and other postretirement benefit plans for certain eligible employees. Components of net periodic benefit cost for the Company's pension and other postretirement benefit plans were as follows:
Three Months |  | Pension Benefits |  |  | Other Postretirement Benefits |
Ended September 30, |  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |
|  | (In thousands) |
Components of net periodic benefit cost: |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 35 |  |  | $ | 792 |  |  | $ | 361 |  |  | $ | 313 |
Interest cost |  |  | 4,706 |  |  |  | 5,521 |  |  |  | 1,175 |  |  |  | 1,122 |
Expected return on assets |  |  | (5,679 | ) |  |  | (6,373 | ) |  |  | (1,263 | ) |  |  | (1,261 | )
Amortization of prior service cost (credit) |  |  | (54 | ) |  |  | 42 |  |  |  | (669 | ) |  |  | (762 | )
Amortization of net actuarial loss |  |  | 917 |  |  |  | 745 |  |  |  | 430 |  |  |  | 195 |
Amortization of net transition obligation |  |  | - |  |  |  | - |  |  |  | 532 |  |  |  | 490 |
Net periodic benefit cost, including amount capitalized |  |  | (75 | ) |  |  | 727 |  |  |  | 566 |  |  |  | 97 |
Less amount capitalized |  |  | 323 |  |  |  | 268 |  |  |  | (41 | ) |  |  | (1 | )
Net periodic benefit cost |  | $ | (398 | ) |  | $ | 459 |  |  | $ | 607 |  |  | $ | 98 |
Nine Months |  | Pension Benefits |  |  | Other Postretirement Benefits |
Ended September 30, |  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |
|  | (In thousands) |
Components of net periodic benefit cost: |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 1,689 |  |  | $ | 2,097 |  |  | $ | 1,083 |  |  | $ | 1,044 |
Interest cost |  |  | 14,625 |  |  |  | 14,451 |  |  |  | 3,525 |  |  |  | 3,716 |
Expected return on assets |  |  | (17,106 | ) |  |  | (17,057 | ) |  |  | (3,789 | ) |  |  | (4,230 | )
Amortization of prior service cost (credit) |  |  | 33 |  |  |  | 111 |  |  |  | (2,007 | ) |  |  | (2,541 | )
Amortization of net actuarial loss |  |  | 3,509 |  |  |  | 1,973 |  |  |  | 688 |  |  |  | 650 |
Amortization of net transition obligation |  |  | - |  |  |  | - |  |  |  | 1,594 |  |  |  | 1,635 |
Curtailment loss |  |  | 1,218 |  |  |  | - |  |  |  | - |  |  |  | - |
Net periodic benefit cost, including amount capitalized |  |  | 3,968 |  |  |  | 1,575 |  |  |  | 1,094 |  |  |  | 274 |
Less amount capitalized |  |  | 858 |  |  |  | 651 |  |  |  | (136 | ) |  |  | 83 |
Net periodic benefit cost |  | $ | 3,110 |  |  | $ | 924 |  |  | $ | 1,230 |  |  | $ | 191 |

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- 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 3 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e2417-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 4, 7, 16, 20, 21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: 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=6962843&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5, 6, 7 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: 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=6962843&loc=d3e2410-114920 Reference 7: 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=6930749&loc=d3e4179-114921 Reference 8: 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=6962843&loc=d3e2439-114920 + Details
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