Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies Disclosure [Abstract]

Commitments Under Operating Leases

The estimated future minimum noncancelable lease commitments under operating leases are as follows:

December 31,	Facilities		Equipment		Total
2013	$	7,502	$	1,250	$	8,752
2014	7,554		273		7,827
2015	7,698		74		7,772
2016	7,857				7,857
2017	7,517				7,517
Thereafter	52,520				52,520
	$	90,648	$	1,597	$	92,245

Rent Expense Under Operating Leases

Rent expense under operating leases was:

Year Ending December 31,	Facilities		Equipment		Total
2012	$	7,428	$	601	$	8,029
2011	7,191		599		7,790
2010	7,301		335		7,636

Commitments Under Capital Leases

The estimated future minimum noncancelable lease commitments under capital leases are as follows:

December 31,	Equipment
2013	$	1,255
2014	130
Total minimum lease payments	1,385
Less: amount representing interest	(76		)
	$	1,309

Commitments Under Facility Lease Obligations

The estimated future minimum noncancelable commitments under these facility lease obligations, as of December 31, 2012, are as follows:

December 31,	Buildings A and B		Building C		Total
2013	$	13,092	$	4,370	$	17,462
2014	13,343		4,490		17,833
2015	13,600		4,614		18,214
2016	13,864		4,740		18,604
2017	14,134		4,870		19,004
Thereafter	98,906		35,029		133,935
	$	166,939	$	58,113	$	225,052