Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Commitments Under Operating Leases

The estimated future minimum noncancelable lease commitments under operating leases, as of December 31, 2017, are as follows:

	Facilities		Equipment		Total
2018	$	2,866	$	6,097	$	8,963
2019	3,095		817		3,912
2020	2,713		426		3,139
2021	2,386		45		2,431
2022	1,901		26		1,927
Thereafter	1,498		8		1,506
	$	14,459	$	7,419	$	21,878

Rent Expense Under Operating Leases

Rent expense under operating leases was:

Year Ended December 31,	Facilities		Equipment		Total
2017	$	3,138	$	1,151	$	4,289
2016	$	15,861	$	852	$	16,713
2015	$	14,659	$	543	$	15,202

Commitments under facility lease obligation

the estimated future minimum noncancelable commitments under the Company's capital and facility lease obligations, excluding the purchase price the Company would be obligated to pay if the Company were to exercise its option to purchase the Facility (as described above), are as follows:

	Capital and Facility Lease Obligations
2018	$	21,085
2019	23,838
2020	26,257
2021	27,650
2022	6,837
Thereafter	—
	$	105,667