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Goodwill (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended			3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2012 Goodwill [Member]	Mar. 31, 2012 Goodwill [Member]	Sep. 30, 2011 Goodwill [Member]
Indefinite-lived Intangible Assets [Line Items]
Goodwill and intangible assets impairment	$ 49,521	$ 3,277	$ 0	$ 13,200	$ 6,500	$ 3,300
Goodwill (Textual) [Abstract]
Impairments analyses	Sep. 30, 2012

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Impairments analyses.

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- Definition

Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill.

+ References

No definition available.

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