Other Assets (Tables)

12 Months Ended

Dec. 31, 2011

Other Assets [Abstract]

Net Value Of Perpetual License

	December 31,
(In thousands)	2011		2010
Net value of perpetual license		$5,936		$7,436

Amortization Expense Of Perpetual License

	Year Ended December 31, 2011		Seven  Months Ended December 31, 2010		Year Ended May 31,
(In thousands)					2010		2009
Amortization expense of perpetual license		$1,500		$875		$1,500		$689