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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010
Goodwill and Intangible Assets Disclosure [Abstract] |  |
Goodwill | Goodwill. A roll-forward of goodwill is as follows (see Note 5 for additional information about the Company's business acquisitions):
Balance as of December 31, 2009 | $ | — |
Goodwill arising from Nichols acquisition | 3.1 |
Balance as of December 31, 2010 | $ | 3.1 |
Goodwill arising from Alexco acquisition | 34.1 |
Balance as of December 31, 2011 | $ | 37.2 |
Identifiable intangible assets | December 31, 2011:
|  | Weighted average Estimated useful life |  | Original cost |  | Accumulated amortization |  | Net book value
Customer relationships |  | 25 |  |  | $ | 38.5 |  |  | $ | (1.7 | ) |  | $ | 36.8 |
Backlog |  | 2 |  |  | 0.8 |  |  | (0.7 | ) |  | 0.1 |
Trademark and trade name |  | 3 |  |  | 0.4 |  |  | (0.1 | ) |  | 0.3 |
Total |  | 24 |  |  | $ | 39.7 |  |  | $ | (2.5 | ) |  | $ | 37.2 |
| December 31, 2010:
|  | Weighted average Estimated useful life |  | Original cost |  | Accumulated amortization |  | Net book value
Customer relationships |  | 20 |  |  | $ | 3.8 |  |  | $ | (0.1 | ) |  | $ | 3.7 |
Backlog |  | 3 |  |  | 0.5 |  |  | (0.2 | ) |  | 0.3 |
Total |  | 18 |  |  | $ | 4.3 |  |  | $ | (0.3 | ) |  | $ | 4.0 |
Expected amortization of intangible assets for the next five years | The expected amortization of intangible assets for the next five calendar years is as follows:
2012 | $ | 1.8 |
2013 | 1.7 |
2014 | 1.6 |
2015 | 1.6 |
2016 | 1.6 |
Thereafter | 28.9 |
Total | $ | 37.2 |

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- Definition Tabular disclosure of the estimated aggregate amortization expense for intangible assets subject to amortization for each of the five succeeding fiscal years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 350 -SubTopic 30 -Publisher FASB -Number -Article -Subparagraph (a) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275 + Details
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- Definition Tabular disclosure of amortizable intangibles assets, in total and by major class, including the gross carrying amount and accumulated amortization. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a -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 Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16265-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275 + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total. Disclosure details may include, but are not limited to, the carrying amount of goodwill, goodwill acquired during the year, goodwill impairment losses recognized, goodwill written-off due to the sale of a business unit, goodwill not yet allocated, and any other changes to goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13854-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13816-109267 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph c -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 142 -Paragraph 45 -Subparagraph e -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 142 -Paragraph 47 -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. + Details
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