Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies

Schedule of future minimum lease payments under non-cancelable operating lease

(in thousands)
Years ending December 31:
2013	$	5,029
2014		4,859
2015		5,005
2016		5,155
2017		5,310
Thereafter		13,497
Total	$	38,855

Schedule of expenses and income associated with operating leases

	Year Ended December 31,
(in thousands)	2012			2011			2010
Rent expense	$	5,720		$	6,702		$	6,779
Sublease income, net		(160	)		(637	)		(622	)