Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2016

Commitments under facility lease obligation [Table Text Block]

The estimated future minimum noncancelable commitments under these facility lease obligations, as of December 31, 2016, exclusive of the potential impact of the closing of the Purchase Agreement (which is anticipated to occur in the first quarter of 2017), are as follows:



	Buildings A and B		Building C		Buildings D and E		Building F		Total
2017	$	13,965	$	4,740	$	12,922	$	490	$	32,117
2018	14,242		4,873		13,267		759		33,141
2019	14,526		5,009		13,621		786		33,942
2020	14,818		5,149		13,983		813		34,763
2021	15,116		5,292		14,354		841		35,603
Thereafter	101,010		48,801		121,927		7,190		278,928
	$	173,677	$	73,864	$	190,074	$	10,879	$	448,494

Commitments Under Operating Leases

The estimated future minimum noncancelable lease commitments under operating leases, as of December 31, 2016, are as follows:



	Facilities		Equipment		Total
2017	$	4,728	$	5,156	$	9,884
2018	4,860		825		5,685
2019	4,817		273		5,090
2020	4,271		12		4,283
2021	3,982		11		3,993
Thereafter	22,336		—		22,336
	$	44,994	$	6,277	$	51,271

Rent Expense Under Operating Leases

Rent expense under operating leases was:



Year Ended December 31,	Facilities		Equipment		Total
2016	$	15,861	$	852	$	16,713
2015	14,659		543		15,202
2014	13,360		952		14,312

Facility lease obligation [Table Text Block]

Facility lease obligations consist of the following:



	As of December 31,
	2016		2015
Buildings A and B	$	99,323	$	108,857
Building C	44,338		49,475
Buildings D and E	194,037		206,376
Building F	16,154		—
	$	353,852	$	364,708