Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2012

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

Depreciation and amortization of property and equipment are provided over their estimated useful lives, using the straight-line method, as follows:

Computer equipment and related software	3 - 5 years
Leasehold and building improvements	Shorter of the lease term or the estimated useful life
Furniture and fixtures	5 years
Equipment	3 - 5 years

Property and equipment consist of the following (in thousands):

	December 31, 2012			December 31, 2011
Equipment	$	32,528		$	25,101
Furniture and fixtures	5,126			1,811
Leasehold improvements	6,992			3,692
Purchased software	19,870			20,641
Capital in process	2,693			2,283
	67,209			53,528
Accumulated depreciation and amortization	(33,102		)	(36,222		)
Property and equipment, net	$	34,107		$	17,306