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Goodwill and Other Intangible Assets (Details 2) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Intangible assets, net | $ 77,726,000 |  | $ 93,501,000 |
Gross Carrying Amount | 250,338,000 |  | 250,597,000 |
Accumulated Amortization | 172,612,000 |  | 157,096,000 |
Amortization expense for intangible assets | 17,600,000 |  | 31,500,000 | 33,000,000
Estimated amortization expense for the next five years |  |  |  |
2013 | 16,500,000 | [1] |  |
2014 | 14,250,000 | [1] |  |
2015 | 9,750,000 | [1] |  |
2016 | 8,000,000 | [1] |  |
2017 | 4,250,000 | [1] |  |
Customer related |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 183,862,000 |  | 183,576,000 |
Accumulated Amortization | 129,904,000 |  | 119,708,000 |
Non-compete agreements |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 1,347,000 |  | 1,353,000 |
Accumulated Amortization | 1,310,000 |  | 1,301,000 |
Patents |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 6,909,000 |  | 6,884,000 |
Accumulated Amortization | 5,503,000 |  | 5,145,000 |
Technology related |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 29,588,000 |  | 29,497,000 |
Accumulated Amortization | 17,551,000 |  | 14,614,000 |
Trade names |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 18,685,000 |  | 18,538,000 |
Accumulated Amortization | 11,688,000 |  | 8,379,000 |
Other |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 9,947,000 |  | 10,749,000 |
Accumulated Amortization | $ 6,656,000 |  | $ 7,949,000 |
[1] | These estimated amortization expense amounts do not reflect the potential effect of future foreign currency exchange rate fluctuations.

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + 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(2) -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 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 + Details
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