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Goodwill (Changes In The Carrying Amount Of Goodwill By Geographic Reporting Unit) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Goodwill [Line Items] |  |  |
Balance at beginning of period | $ 589,537,000 | $ 370,066,000 |
Acquisitions and adjustments | 55,262,000 | 235,897,000 |
Impairment of goodwill | (443,659,000) | 0 | $ 0
Effect of foreign currency exchange rates | (13,265,000) | (16,426,000) |
Balance at end of period | 187,875,000 | 589,537,000 | 370,066,000
Americas [Member] |  |  |
Goodwill [Line Items] |  |  |
Balance at beginning of period | 339,411,000 | 264,735,000 |
Acquisitions and adjustments | 47,452,000 | 72,872,000 |
Impairment of goodwill | (382,271,000) |  |
Effect of foreign currency exchange rates | (4,592,000) | 1,804,000 |
Balance at end of period |  | 339,411,000 | 264,735,000
EMEA [Member] |  |  |
Goodwill [Line Items] |  |  |
Balance at beginning of period | 216,942,000 | 71,155,000 |
Acquisitions and adjustments | 2,602,000 | 163,025,000 |
Impairment of goodwill | (61,388,000) |  |
Effect of foreign currency exchange rates | (7,635,000) | (17,238,000) |
Balance at end of period | 150,521,000 | 216,942,000 | 71,155,000
Asia Pacific [Member] |  |  |
Goodwill [Line Items] |  |  |
Balance at beginning of period | 33,184,000 | 34,176,000 |
Acquisitions and adjustments | 5,208,000 |  |
Effect of foreign currency exchange rates | (1,038,000) | (992,000) |
Balance at end of period | $ 37,354,000 | $ 33,184,000 | $ 34,176,000

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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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- Definition Amount of loss from the write-down of an asset representing the 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 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 3: 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=31042434&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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