v2.4.0.8

Acquisitions - Gas-Arc Group Acquisition (Details) (USD $) In Thousands, unless otherwise specified				0 Months Ended		1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Oct. 31, 2013 Gas-Arc Group Ltd	Oct. 31, 2013 Selling, General and Administrative Expenses Gas-Arc Group Ltd	Jan. 31, 2014 Subsequent Event Gas-Arc Group Ltd
Business Acquisition [Line Items]
Acquisition price				$ 39,015
Acquisition price paid				32,831		6,184
Transaction costs					1,871
Goodwill	195,743	187,123	182,429	13,504
Intangibles				$ 21,506

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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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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

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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.

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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.

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