COMMITMENTS AND CONTINGENCIES In the normal course of business, from time to time, the Company is involved in legal proceedings relating to the ownership and operations of its properties. In addition, on June 14, 2018, the Company was served with a petition involving approximately 500 individuals or entities who claim that their properties, located in the Timarron Park neighborhood of The Woodlands, were damaged by flood waters that resulted from the unprecedented rainfall that occurred throughout Harris County and surrounding areas during Hurricane Harvey in August 2017. The complaint was filed in State Court in Harris County of the State of Texas. In general, the plaintiffs allege negligence in the development of Timarron Park and violations of Texas Deceptive Trade Practices Act and name as defendants The Howard Hughes Corporation, The Woodlands Land Development Company and two unaffiliated parties involved in the planning and engineering of Timarron Park. The Company intends to vigorously defend the matter as it believes that these claims are baseless and without merit and that it has substantial legal and factual defenses to the claims and allegations contained in the complaint. Based upon the present status of this matter, the Company does not believe it is probable that a loss will be incurred. Accordingly, the Company has not recorded a charge as a result of this action. In managements opinion, the liabilities, if any, that may ultimately result from normal course of business legal actions, and the Woodlands legal proceeding discussed above, are not expected to have a material effect on HHC's consolidated financial position, results of operations or liquidity. As of December 31, 2018 and December 31, 2017, the Company had outstanding letters of credit and a guarantee totaling $15.3 million and $13.8 million and surety bonds totaling $101.2 million and $88.5 million , respectively. These letters of credit, guarantee and bonds were issued primarily in connection with insurance requirements, special real estate assessments and construction obligations. The Company leases land or buildings at certain properties from third parties. Rental payments are expensed as incurred and, to the extent applicable, have been straight-lined over the term of the lease. Contractual rental expense, including participation rent, was $9.7 million , $8.6 million and $8.4 million for the years ended December 31, 2018 , 2017 and 2016, respectively. The amortization of above and below-market ground leases and straight-line rents included in the contractual rent amount was not significant. HHC's obligations for minimum rentals under non-cancelable operating leases are as follows: Subsequent/ (In thousands) 2019 2020 2021 2022 2023 Other Total Ground lease and other leasing commitments $ 8,199 $ 7,871 $ 7,380 $ 6,713 $ 8,380 $ 291,611 $ 330,154 The Company has entered into guarantee agreements as part of certain development projects. In conjunction with the execution of the ground lease for the Seaport District NYC, the Company executed a completion guarantee for the redevelopment of Seaport District NYC - Pier 17 and Seaport District NYC - Tin Building. As part of the Funding Agreement for the Downtown Columbia Redevelopment District TIF bonds, one of HHC's wholly-owned subsidiaries has agreed to complete certain defined public improvements and to indemnify Howard County, Maryland for certain matters. The Company has guaranteed these obligations, with a limit of $1.0 million , expiring on October 31, 2020. To the extent that increases in taxes do not cover debt service payments on the TIF bonds, HHCs wholly-owned subsidiary is obligated to pay special taxes. The Company evaluates the likelihood of future performance under these guarantees and did not record an obligation as of December 31, 2018 and December 31, 2017.