Commitments and Contingencies Contractual and purchase obligations We lease facilities under non-cancelable operating leases with various expiration dates through 2024. The facilities generally require us to pay property taxes, insurance and maintenance costs. Further, several lease agreements contain rent escalation clauses or rent holidays. For purposes of recognizing minimum rental expenses on a straight-line basis over the terms of the leases, we use the date of initial possession to begin amortization. We have the option to extend or renew most of our leases, which may increase the future minimum lease commitments. Purchase obligations are primarily for purchases of inventory and manufacturing related service contracts. Purchase obligations are defined as agreements that are enforceable and legally binding and that specify all significant terms, including: fixed or minimum quantities to be purchased; fixed, minimum or variable price provisions; and the approximate timing of the transaction. Timing of payments and actual amounts paid may be different depending on the time of receipt of goods or services or changes to agreed-upon amounts for some obligations. Our lease and purchase obligations have not materially changed as of June 25, 2016 from those disclosed in our Annual Report on Form 10-K for the year ended December 26, 2015 , apart from Cascade Microtech's lease and purchase obligations which are disclosed below as of June 25, 2016 , and arising as a result of our acquisition of Cascade Microtech on June 24, 2016. See Note 3 to the Condensed Consolidated Financial Statements - Acquisition, for further details. Remainder of 2016 2017-2018 2019-2020 2021 and Beyond Total (In thousands) Operating leases $ 1,225 $ 4,091 $ 1,868 $ 384 $ 7,568 Purchase order commitments obligations (1) 5,227 169   5,396 Total $ 6,452 $ 4,260 $ 1,868 $ 384 $ 12,964 (1) Purchase order commitments primarily represent open orders for inventory and capital expenditures. Also, our contractual obligations as of June 25, 2016 inclu