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Note 7. Employee Benefit Plans | 9 Months Ended
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Sep. 30, 2012
Pension and Other Postretirement Benefits Disclosure [Text Block] | Note 7. Employee Benefit Plans We sponsor two defined benefit pension plans which together cover substantially all U.S. employees. Net periodic pension cost for the plans consisted of the following for the three and nine months ended September 30, 2012 and 2011 (in thousands):
|  | Three Months Ended September 30, |
|  | Pension Benefits |  |  | Other Benefits |
|  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
Service cost |  | $ | 993 |  |  | $ | 969 |  |  | $ | 17 |  |  | $ | 14 |
Interest cost |  |  | 1,017 |  |  |  | 1,028 |  |  |  | 19 |  |  |  | 19 |
Expected return on plan assets |  |  | (1,145 | ) |  |  | (1,370 | ) |  |  | (22 | ) |  |  | (22 | )
Amortization of prior service cost |  |  | 101 |  |  |  | 101 |  |  |  | 48 |  |  |  | 55 |
Amortization of net (gain) loss |  |  | 706 |  |  |  | 220 |  |  |  | (22 | ) |  |  | (32 | )
Net periodic benefit cost |  | $ | 1,672 |  |  | $ | 948 |  |  | $ | 40 |  |  | $ | 34 |
|  | Nine Months Ended September 30, |
|  | Pension Benefits |  |  | Other Benefits |
|  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
Service cost |  | $ | 2,980 |  |  | $ | 2,908 |  |  | $ | 51 |  |  | $ | 41 |
Interest cost |  |  | 3,051 |  |  |  | 3,085 |  |  |  | 58 |  |  |  | 58 |
Expected return on plan assets |  |  | (3,435 | ) |  |  | (4,111 | ) |  |  | — |  |  |  | — |
Amortization of prior service cost |  |  | 301 |  |  |  | 302 |  |  |  | 33 |  |  |  | 33 |
Amortization of net (gain) loss |  |  | 2,119 |  |  |  | 660 |  |  |  | (22 | ) |  |  | (32 | )
Net periodic benefit cost |  | $ | 5,016 |  |  | $ | 2,844 |  |  | $ | 120 |  |  | $ | 100 |
The increased service costs in 2012 versus 2011 were driven primarily by higher staffing and compensation levels. As of September 30, 2012, the Company has made contributions to the pension plans of approximately $1.1 million and intends to contribute an additional $0.9 million in the fourth quarter 2012 for total contributions in 2012 of $2.0 million.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 7, 21, 22 -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS106-2 -Paragraph 20, 21, 22 -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 Implementation Guide (Q and A) -Number FAS88 -Paragraph 63 -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 -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 Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5, 6, 7, 8 -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. 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