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Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2012
Employee Benefit Plans [Abstract] |
Schedule of Changes in Projected Benefit Obligations [Table Text Block] |
|  | December 31, |
|  | Pension Benefits |  | Other Benefits |
|  | 2012 |  | 2011 |  | 2012 |  | 2011 |
Change in benefit obligation: |  |  |  |  |  |  |  |  |  |  |  |
Benefit obligation at beginning of year | $ | 93,101 |  | $ | 69,626 |  | $ | 28,854 |  | $ | 18,395 |
| Service cost |  | 7,531 |  |  | 5,985 |  |  | 1,641 |  |  | 1,116 |
| Interest Cost |  | 4,072 |  |  | 3,916 |  |  | 1,246 |  |  | 1,035 |
| Participant contributions |  | -- |  |  | -- |  |  | 122 |  |  | 176 |
| Actuarial (gains) losses |  | 13,270 |  |  | 16,164 |  |  | 2,341 |  |  | 8,348 |
| Benefits paid |  | (5,776) |  |  | (2,100) |  |  | (251) |  |  | (216) |
| Foreign currency rate change effect |  | 561 |  |  | (490) |  |  | -- |  |  | -- |
Benefit obligation at end of year | $ | 112,759 |  | $ | 93,101 |  | $ | 33,953 |  | $ | 28,854 |
Schedule of Changes in Fair Value of Plan Assets [Table Text Block] |
| December 31, |
|  | Pension Benefits |  | Other Benefits |
|  | 2012 |  | 2011 |  | 2012 |  | 2011 |
Change in plan assets: |  |  |  |  |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of year | $ | 41,300 |  | $ | 35,888 |  | $ | -- |  | $ | -- |
| Actual return on plan assets |  | 5,449 |  |  | 540 |  |  | -- |  |  | -- |
| Employer contributions |  | 8,543 |  |  | 6,972 |  |  | 129 |  |  | 40 |
| Participant contributions |  | -- |  |  | -- |  |  | 122 |  |  | 176 |
| Benefits paid and expenses |  | (5,776) |  |  | (2,100) |  |  | (251) |  |  | (216) |
| Administrative expense |  | -- |  |  | -- |  |  | -- |  |  | -- |
Fair value of plan assets at end of year | $ | 49,516 |  | $ | 41,300 |  | $ | -- |  | $ | -- |
Funded status at end of year | $ | (63,243) |  | $ | (51,801) |  | $ | (33,953) |  | $ | (28,854) |
Schedule of Net Funded Status [Table Text Block] |
|  | December 31,
|  | Qualified Plans |  | Non-Qualified Plans(1) |  | Total
|  | 2012 |  | 2011 |  | 2012 |  | 2011 |  | 2012 |  | 2011
Aggregate fair value of plan assets | $ | 49,516 |  | $ | 41,300 |  | $ | -- |  | $ | -- |  | $ | 49,516 |  | $ | 41,300
Aggregate projected benefit obligations |  | 62,397 |  |  | 51,980 |  |  | 50,362 |  |  | 41,121 |  |  | 112,759 |  |  | 93,101
| Under funded | $ | (12,881) |  | $ | (10,680) |  | $ | (50,362) |  | $ | (41,121) |  | $ | (63,243) |  | $ | (51,801)
(1) For non-qualified plans, there are no required funding levels.
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] |
|  | December 31, |
|  | Pension Benefits |  | Other Benefits |
|  | 2012 |  | 2011 |  | 2012 |  | 2011 |
Amounts recognized in accumulated other comprehensive income: |  |  |  |  |  |  |  |  |  |  |  |
Net actuarial loss | $ | 37,314 |  | $ | 30,565 |  | $ | 15,472 |  | $ | 13,875 |
Net prior service cost |  | 2,506 |  |  | 2,804 |  |  | -- |  |  | -- |
Total | $ | 39,820 |  | $ | 33,369 |  | $ | 15,472 |  | $ | 13,875 |
Schedule Of Projected Benefit Obligations In Excess Of Fair Value Of Plan Assets [Table Text Block] |
|  | 2012 |  | 2011 |  |  |  |  |  |  |
Projected benefit obligation | $ | 112,759 |  | $ | 93,101 |  |  |  |  |  |  |
Fair value of plan assets |  | 49,516 |  |  | 41,300 |  |  |  |  |  |  |
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block] |
The accumulated benefit obligations for all defined benefit pension plans were $106.8 million and $89.5 million at December 31, 2012 and 2011, respectively. The following table presents information for pension plans with an accumulated benefit obligation in excess of plan assets as of December 31, 2012 and 2011 (dollars in thousands):
|  | 2012 |  | 2011 |  |  |  |  |  |  |
Accumulated benefit obligation | $ | 106,845 |  | $ | 89,531 |  |  |  |  |  |  |
Fair value of plan assets |  | 49,516 |  |  | 41,300 |  |  |  |  |  |  |
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] |
The components of net periodic benefit cost and other changes in plan assets and benefit obligations recognized in other comprehensive income were as follows (dollars in thousands):
|  | Pension Benefits |  | Other Benefits
|  | 2012 |  | 2011 |  | 2010 |  | 2012 |  | 2011 |  | 2010
Net periodic benefit cost: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | 7,531 |  | $ | 5,985 |  | $ | 4,762 |  | $ | 1,641 |  | $ | 1,116 |  | $ | 847
Interest cost |  | 4,072 |  |  | 3,916 |  |  | 3,420 |  |  | 1,246 |  |  | 1,035 |  |  | 882
Expected return on plan assets |  | (3,066) |  |  | (2,937) |  |  | (2,577) |  |  | -- |  |  | -- |  |  | --
Amortization of prior actuarial losses |  | 3,439 |  |  | 980 |  |  | 688 |  |  | 743 |  |  | 353 |  |  | 236
Amortization of prior service cost |  | 376 |  |  | 399 |  |  | (171) |  |  | -- |  |  | -- |  |  | --
Settlements |  | 841 |  |  | -- |  |  | -- |  |  | -- |  |  | -- |  |  | --
| Net periodic benefit cost |  | 13,193 |  |  | 8,343 |  |  | 6,122 |  |  | 3,630 |  |  | 2,504 |  |  | 1,965
Other changes in plan assets and benefit obligations recognized in other comprehensive income: |  |  |  |  |  |  |  |  |  |  |  |  |
Net actuarial (gains) losses |  | 10,888 |  |  | 18,561 |  |  | (3,743) |  |  | 2,341 |  |  | 8,348 |  |  | 2,326
Prior service cost |  | -- |  |  | -- |  |  | -- |  |  | -- |  |  | -- |  |  | --
Amortization of actuarial (gains) losses |  | (3,439) |  |  | (980) |  |  | (688) |  |  | (743) |  |  | (353) |  |  | (236)
Amortization of prior service cost (credit) |  | (376) |  |  | (399) |  |  | 171 |  |  | -- |  |  | -- |  |  | --
Settlements |  | (841) |  |  | -- |  |  | -- |  |  | -- |  |  | -- |  |  | --
Foreign exchange translations and other adjustments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | 219 |  |  | (196) |  |  | (307) |  |  | -- |  |  | -- |  |  | --
| Total recognized in other comprehensive income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | 6,451 |  |  | 16,986 |  |  | (4,567) |  |  | 1,598 |  |  | 7,995 |  |  | 2,090
| Total recognized in net periodic benefit cost and other comprehensive income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| $ | 19,644 |  | $ | 25,329 |  | $ | 1,555 |  | $ | 5,228 |  | $ | 10,499 |  | $ | 4,055
Schedule of Expected Benefit Payments [Table Text Block] |
| Pension Benefits |  | Other Benefits
2013 | $ | 4,971 |  | $ | 350
2014 |  | 5,320 |  |  | 438
2015 |  | 5,547 |  |  | 505
2016 |  | 8,297 |  |  | 584
2017 |  | 7,167 |  |  | 666
2018-2022 |  | 45,270 |  |  | 4,812
Schedule of Assumptions Used [Table Text Block] |
|  | Pension Benefits |  | Other Benefits
|  | 2012 |  | 2011 |  | 2010 |  | 2012 |  | 2011 |  | 2010
Discount rate used to determine benefit obligation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| 3.80 | % |  | 4.48 | % |  | 5.47 | % |  | 4.15 | % |  | 4.50 | % |  | 5.40 | %
Discount rate used to determine net benefit cost or income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| 4.12 | % |  | 5.22 | % |  | 5.96 | % |  | 4.50 | % |  | 5.40 | % |  | 5.75 | %
Expected long-term rate of return on plan assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| 7.75 | % |  | 7.75 | % |  | 8.50 | % |  | -- | % |  | -- | % |  | -- | %
Rate of compensation increases | 4.20 | % |  | 4.20 | % |  | 4.20 | % |  | -- | % |  | -- | % |  | -- | %
Schedule of Health Care Cost Trend Rates [Table Text Block] |
| December 31,
| 2012 |  | 2011
Pre-Medicare eligible claims | 9% down to 5% in 2016 |  | 9% down to 5% in 2015
Medicare eligible claims | 9% down to 5% in 2015 |  | 8% down to 5% in 2013
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block] |
Assumed health care cost trend rates may have a significant effect on the amounts reported for health care plans. A one-percentage point change in assumed health care cost trend rates would have the following effects (dollars in thousands):
| One Percent Increase |  | One Percent Decrease |
Effect on total of service and interest cost components | $ | 826 |  | $ | (607) |
Effect on accumulated postretirement benefit obligation | $ | 8,238 |  | $ | (6,222) |
Schedule of Allocation of Plan Assets [Table Text Block] |
|  | December 31, 2012 |
|  |  |  |  | Fair Value Measurement Using: |
|  | Total |  | Level 1 |  | Level 2 |  | Level 3 |
Mutual Funds(1) | $ | 49,456 |  | $ | 49,456 |  | $ | -- |  | $ | -- |
Cash |  | 60 |  |  | 60 |  |  | -- |  |  | -- |
| Total | $ | 49,516 |  | $ | 49,516 |  | $ | -- |  | $ | -- |
(1) | Mutual funds were invested 42% in U.S. equity funds, 39% in U.S. fixed income funds, 16% in non-U.S. equity funds and 3% in other.
|  | December 31, 2011 |
|  |  |  |  | Fair Value Measurement Using: |
|  | Total |  | Level 1 |  | Level 2 |  | Level 3 |
Mutual Funds(2) | $ | 41,250 |  | $ | 41,250 |  | $ | -- |  | $ | -- |
Cash |  | 50 |  |  | 50 |  |  | -- |  |  | -- |
| Total | $ | 41,300 |  | $ | 41,300 |  | $ | -- |  | $ | -- |
(2) | Mutual funds were invested 43% in bond index funds, 25% in S&P 500 index funds, 12% in mid-cap stock funds, 13% in foreign large blend funds and 7% in small-cap funds.

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- Definition Tabular disclosure of accumulated benefit obligations and fair values of plan assets of pension plans and/or other employee benefit plans where the accumulated benefit obligation exceeds the fair value of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 715 -SubTopic 20 -Publisher FASB -Number -Article -Subparagraph (b) -Name Accounting Standards Codification -Paragraph 3 -Section 50 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e2417-114920 + Details
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- Definition Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 715 -SubTopic 20 -Publisher FASB -Number -Article -Subparagraph (d)(5) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation and net benefit cost, including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 715 -SubTopic 20 -Publisher FASB -Number -Article -Subparagraph (k) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the change in the benefit obligation of pension plans and/or other employee benefit plans from the beginning to the end of the period, showing separately, if applicable, the effects of the following: service cost, interest cost, contributions by plan participants, actuarial gains and losses, foreign currency exchange rate changes, benefits paid, plan amendments, business combinations, divestitures, curtailments, settlements, and special and contractual termination benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 715 -SubTopic 20 -Publisher FASB -Number -Article -Subparagraph (a) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the effect of a one-percentage-point increase and the effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs and the accumulated postretirement benefit obligation for health care benefits. + References Reference 1: 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 -Subparagraph (m) + Details
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