Goodwill and Other Intangible Assets (Schedule of Goodwill) (Details) (USD $)	3 Months Ended
Mar. 31, 2014
Goodwill [Roll Forward]
Balance as of December 31, 2013	$ 307,365,845
Acquisitions	0
Divestitures	0
Impairments	0
Other	0
Balance as of March 31, 2014	$ 307,365,845

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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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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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.

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Amount of other (increase) decrease 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.

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Amount of divestiture 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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