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Goodwill (Details) (USD $)
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3 Months Ended | |
|---|---|---|
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Mar. 31, 2014
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Mar. 31, 2013
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| Goodwill [Line Items] | ||
| Acquisition of business, net of cash acquired | $ 1,144,000 | $ 0 |
| Impairment loss for goodwill | 0 | 0 |
| Accumulated impairment of goodwill since the Merger | 4,766,190,000 | |
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Agero, Inc. [Member]
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| Goodwill [Line Items] | ||
| Acquisition of business, net of cash acquired | $ 1,144,000 | |
| X | ||||||||||
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- Definition
Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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