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Goodwill and Other Intangible Assets (Rollforward of Other Intangible Assets) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Other Intangible Assets [Line Items] |  |  |  |  |  |
Other intangible assets, gross carrying amount |  |  |  |  |  | $ 354,200
Accumulated amortization |  |  |  |  |  | (103,800)
Other Intangible Assets [Rollforward] |  |  |  |  |  |
Other intangible assets, net, beginning balance |  |  |  | $ 250,373 |  |
Amortization expense |  | $ (6,900) | $ (6,600) | (21,500) | $ (17,000) |
Currency translation adjustments, other intangible assets |  |  |  | (10,100) |  |
Other intangible assets, net, ending balance |  | 218,761 |  | 218,761 |  |
Customer Relationships and Backlog [Member] |  |  |  |  |  |
Other Intangible Assets [Line Items] |  |  |  |  |  |
Other intangible assets, amortizing, gross carrying amount |  |  |  |  |  | 199,800
Accumulated amortization |  |  |  |  |  | (90,300)
Other Intangible Assets [Rollforward] |  |  |  |  |  |
Other intangible assets, net, amortizing, beginning balance |  |  |  | 109,500 |  |
Amortization expense |  |  |  | (20,100) |  |
Currency translation adjustments, amortizing intangible assets |  |  |  | (1,800) |  |
Other intangible assets, net, amortizing, ending balance |  | 87,600 |  | 87,600 |  |
Other Amortizing Intangible Assets [Member] |  |  |  |  |  |
Other Intangible Assets [Line Items] |  |  |  |  |  |
Other intangible assets, amortizing, gross carrying amount | [1] |  |  |  |  | 26,300
Accumulated amortization | [1] |  |  |  |  | (13,500)
Other Intangible Assets [Rollforward] |  |  |  |  |  |
Other intangible assets, net, amortizing, beginning balance | [1] |  |  | 12,800 |  |
Amortization expense | [1] |  |  | (1,400) |  |
Currency translation adjustments, amortizing intangible assets | [1] |  |  | (400) |  |
Other intangible assets, net, amortizing, ending balance | [1] | 11,000 |  | 11,000 |  |
Trade Names [Member] |  |  |  |  |  |
Other Intangible Assets [Line Items] |  |  |  |  |  |
Other intangible assets, non-amortizing, carrying amount |  | 34,800 |  | 34,800 |  | 34,800
Other Intangible Assets [Rollforward] |  |  |  |  |  |
Other intangible assets, non-amortizing, beginning balance |  |  |  | 34,800 |  |
Currency translation adjustments, non-amortizing intangible assets |  |  |  | 0 |  |
Other intangible assets, non-amortizing, ending balance |  | 34,800 |  | 34,800 |  |
Pre-Qualifications [Member] |  |  |  |  |  |
Other Intangible Assets [Line Items] |  |  |  |  |  |
Other intangible assets, non-amortizing, carrying amount |  | 85,400 |  | 93,300 |  | $ 93,300
Other Intangible Assets [Rollforward] |  |  |  |  |  |
Other intangible assets, non-amortizing, beginning balance |  |  |  | 93,300 |  |
Currency translation adjustments, non-amortizing intangible assets |  |  |  | (7,900) |  |
Other intangible assets, non-amortizing, ending balance |  | $ 85,400 |  | $ 85,400 |  |
[1] | Consists principally of trade names and non-compete agreements.

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- Definition Amount of increase (decrease) to intangible assets, excluding goodwill, for foreign currency translation adjustments. + References No definition available. + Details
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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 Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 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=56944662&loc=d3e3602-108585 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)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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