Commitments, Guarantees, and Contingencies

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Commitments, Guarantees, and Contingencies

Commitments

Operating Leases

We have various noncancelable leases for real property and machinery and equipment. Such leases expire at various dates with, in some cases, options to extend their terms.

Minimum rentals under long-term operating leases are as follows (in thousands):



Fiscal year ending:	Real property		Machinery and equipment		Total
2018	$	8,659	$	994	$	9,653
2019	7,364		464		7,828
2020	5,303		109		5,412
2021	3,868		23		3,891
2022	3,094		5		3,099
Thereafter	6,942		—		6,942
Total	$	35,230	$	1,595	$	36,825

Certain of the leases contain provisions for rent escalation based on increases in a specified Consumer Price Index, real estate taxes and operating costs incurred by the lessor. Rent expense was approximately $11.0 million, $9.8 million and $10.2 million for the years ended December 31, 2017, 2016 and 2015, respectively.

Other

As of December 31, 2017, we had eleven outstanding letters of credit totaling $5.4 million, which expire in 2018 through 2022. In addition, we have three outstanding performance bonds totaling $6.4 million for contracts to be completed in 2018.