Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

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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 230

-SubTopic 10

-Section 45

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-Subparagraph (b)

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- Definition

The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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-SubTopic 10

-Section 50

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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination.

+ References

No definition available.

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Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, resulting from a business combination.

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No definition available.

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The net result for the period of deducting operating expenses from operating revenues.

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No definition available.

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- Definition

This element represents a sum total of expenses not separately reflected on the income statement for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-04.7)

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

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-Topic 225

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-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

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ACQUISITIONS (Details) (USD $)	0 Months Ended	3 Months Ended
ACQUISITIONS (Details) (USD $)	Jan. 01, 2015	Mar. 31, 2015	Mar. 31, 2014
Business Acquisition [Line Items]
Revenues		3,300,890,000us-gaap_Revenues	$ 3,142,585,000us-gaap_Revenues
Revenues, pro forma			3,283,647,000
Income from operations		181,925,000us-gaap_OperatingIncomeLoss	156,971,000us-gaap_OperatingIncomeLoss
Income from operations, pro forma			160,681,000
Freightquote
Business Acquisition [Line Items]
Total purchase price	398,400,000
Estimated life		5 years
Identifiable intangible assets	37,800,000
Revenues			141,062,000
Income from operations			3,710,000
Freightquote \| Acquisition-related Costs
Business Acquisition [Line Items]
Additional amortization expense on identifiable intangible assets		(1,890,000)
Other		796,000
Freightquote \| Trademarks
Business Acquisition [Line Items]
Acquired trademarks value	8,600,000
Freightquote \| Customer relationships
Business Acquisition [Line Items]
Identifiable intangible assets	37,500,000
Freightquote \| Noncompete agreements
Business Acquisition [Line Items]
Identifiable intangible assets	$ 300,000