Assets Manufactured for Internal Use

12 Months Ended

Dec. 31, 2011

Assets Manufactured for Internal Use

Assets Manufactured for Internal Use

Note 7.  Assets Manufactured for Internal Use

        The components of assets manufactured for internal use, included in amounts reported as other assets, are as follows:

	December 31,
	2011			2010
	(in thousands)
Cost	$	25,684		$	16,148
Accumulated depreciation		(8,707	)		(3,768	)
	$	16,977		$	12,380

        These products are used in-house for research and development, training, and customer demonstration purposes. Costs are generally amortized to expense over five years. Amortization expense was $4.9 million, $3.3 million, and $3.8 million, for the years ended December 31, 2011, 2010, and 2009, respectively.