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COMMITMENTS AND CONTINGENCIES | 12 Months Ended
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Jan. 01, 2017
Commitments and Contingencies Disclosure [Abstract] |
COMMITMENTS AND CONTINGENCIES | COMMITMENTS AND CONTINGENCIES Workers’ compensation commitments Our insurance carriers and certain state workers’ compensation programs require us to collateralize a portion of our workers’ compensation obligation, for which they become responsible should we become insolvent. The collateral typically takes the form of cash and cash equivalents, highly rated investment grade debt securities, letters of credit, and/or surety bonds. On a regular basis these entities assess the amount of collateral they will require from us relative to our workers' compensation obligation. The majority of our collateral obligations are held in the Trust. We have provided our insurance carriers and certain states with commitments in the form and amounts listed below (in thousands):
| January 1, 2017 |  | December 25, 2015
Cash collateral held by workers' compensation insurance carriers | $ | 28,066 |  |  | $ | 23,133 |
Cash and cash equivalents held in Trust | 32,841 |  |  | 26,046 |
Investments held in Trust | 146,517 |  |  | 126,788 |
Letters of credit (1) | 7,982 |  |  | 4,520 |
Surety bonds (2) | 20,440 |  |  | 17,946 |
Total collateral commitments | $ | 235,846 |  |  | $ | 198,433 |
(1) | We have agreements with certain financial institutions to issue letters of credit as collateral.
(2) | Our surety bonds are issued by independent insurance companies on our behalf and bear annual fees based on a percentage of the bond, which are determined by each independent surety carrier. These fees do not exceed 2.0% of the bond amount, subject to a minimum charge. The terms of these bonds are subject to review and renewal every one to four years and most bonds can be canceled by the sureties with as little as 60 days' notice.
Operating leases We have contractual commitments in the form of operating leases related to office space and equipment. Future non-cancelable minimum lease payments under our operating lease commitments as of January 1, 2017 are as follows for each of the next five years and thereafter (in thousands):
2017 | $ | 6,729 |
2018 | 6,056 |
2019 | 5,365 |
2020 | 4,593 |
2021 | 2,787 |
Thereafter | 602 |
Total future non-cancelable minimum lease payments | $ | 26,132 |
Operating leases are generally renewed in the normal course of business, and most of the options are negotiated at the time of renewal. However, for the majority of our office space leases, we have the right to cancel the lease, typically within 90 days of notification. Accordingly, we have not included the leases with these cancellation provisions in our disclosure of future minimum lease payments. Total rent expense for 2016, 2015, and 2014 was $26.5 million, $23.1 million, and $23.0 million, respectively. Purchase obligations Purchase obligations include agreements to purchase goods and services in the ordinary course of business that are enforceable, legally binding, and specify all significant terms. Purchase obligations do not include agreements that are cancelable without significant penalty. We had $11.6 million of purchase obligations as of January 1, 2017, of which $7.6 million are expected to be paid in 2017. Legal contingencies and developments We are involved in various proceedings arising in the normal course of conducting business. We believe the liabilities included in our financial statements reflect the probable loss that can be reasonably estimated. The resolution of those proceedings is not expected to have a material effect on our results of operations or financial condition.

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