Acquisitions (Details 2) (Total Logistic Control [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2010
Total Logistic Control [Member]
Assets:
Current assets	$ 24,588
Operating property and equipment	73,135
Goodwill	131,911
Customer relationships and other intangibles	34,980
Other assets	816
Assets	265,430
Liabilities:
Current liabilities	(26,875)
Deferred income taxes and other liabilities	(31,432)
Liabilities	58,307
Net asset acquired	$ 207,123

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The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

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The amount of acquisition cost of a business combination allocated to assets acquired.

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The total purchase price of the acquired entity. This includes cash paid to equity interest holders of the acquired entity, fair value of debt and equity securities issued to equity holders of the acquired entity, and transaction costs paid to third parties to consummate the acquisition.

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The amount of acquisition cost of a business combination allocated to current assets.

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Amount of acquisition cost of a business combination allocated to noncurrent deferred tax assets net of valuation allowance and noncurrent deferred tax liabilities.

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Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

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Amount of acquisition cost of a business combination allocated to other noncurrent assets not separately disclosed.

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The amount of acquisition cost of a business combination allocated to property, plant and equipment to be used in ongoing operations.

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