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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 25

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- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

The number of businesses acquired by the entity during the period.

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No definition available.

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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

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Business Acquisition, Contingent Consideration, Payments, Payable Term

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Business Acquisition Contingent Considerations Computation Assumed Discount Rate

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Business combination net working capital adjustment.

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- Definition

The number of businesses acquired by the entity during the period that are not specifically described.

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Acquisitions (Narrative) (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended					1 Months Ended		6 Months Ended
	Jun. 30, 2014 entity	Jun. 30, 2013 entity	Jun. 30, 2014 Dunn & Company LLC [Member]	Jun. 30, 2014 Dunn & Company LLC [Member] Maximum [Member]	Jun. 30, 2014 Dunn & Company LLC [Member] Minimum [Member]	Oct. 31, 2012 R360 Environmental Solutions Inc [Member]	Mar. 31, 2013 R360 Environmental Solutions Inc [Member]	Jun. 30, 2014 Screwbean Landfill, LLC [Member] Dunn & Company LLC [Member]
Business Acquisition [Line Items]
Cash consideration, net of cash acquired	$ 29,596	$ 1,181				$ 18,906		$ 27,020
Contingent consideration payable period			2 years
Contingent Consideration payment discount rate				2.70%	2.40%
Adjustment to net working capital							18,000
Acquisition related costs	648	806
Number of individual businesses acquired that are not specifically described	1
Contingent consideration			$ 2,923	$ 3,000
Number of immaterial businesses acquired in period		3