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Goodwill and Intangible Assets Goodwill (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Oct. 01, 2014
Goodwill [Line Items] |  |  |
Share Price | $ 34.20 us-gaap_SharePrice |  | $ 52.55 us-gaap_SharePrice
Goodwill Beginning | $ 398,905 us-gaap_Goodwill | $ 398,941 us-gaap_Goodwill |
Foreign currency translation adjustments and other | (2,676)us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments | (344)us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments |
Goodwill acquired during the year | 9,293 us-gaap_GoodwillAcquiredDuringPeriod | 308 us-gaap_GoodwillAcquiredDuringPeriod |
Goodwill Ending | $ 405,522 us-gaap_Goodwill | $ 398,905 us-gaap_Goodwill |
Minimum [Member] |  |  |
Goodwill [Line Items] |  |  |
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount | 10.00%us-gaap_ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Maximum [Member] |  |  |
Goodwill [Line Items] |  |  |
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount | 30.00%us-gaap_ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount / us-gaap_RangeAxis = us-gaap_MaximumMember |  |

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: 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=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Details
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- Definition Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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