16. COMMITMENTS AND CONTINGENCIES:

Lease Commitments

We lease certain land, buildings, wet slips, machinery, equipment, and vehicles related to our dealerships under non-cancelable third-party operating leases. Certain of our leases include options for renewal periods and provisions for escalation. Rental expenses, including month-to-month rentals, were approximately $6.0 million, $7.1 million, and $8.3 million for the fiscal years ended September 30, 2015, 2016, and 2017, respectively.

Future minimum lease payments under non-cancelable operating leases as of September 30, 2017, were as follows:

	(Amounts in thousands)
2018		7,637
2019		7,057
2020		7,069
2021		6,365
2022		5,264
Thereafter		34,069
Total	$	67,461

Other Commitments and Contingencies

We are party to various legal actions arising in the ordinary course of business. We believe that these matters should not have a material adverse effect on our consolidated financial condition, results of operations, or cash flows.

During the fiscal years ended September 30, 2015, 2016, and 2017, we incurred costs associated with store closings and lease terminations of approximately $581,000, $0, and $88,000, respectively. These costs primarily related to the future minimum operating lease payments of the closed locations. The store closings were a key component in our effort to better match our fixed costs with the decline in retail business caused by the soft economic conditions. The store closing costs have been included in selling, general, and administrative expenses in the consolidated statements of operations during the fiscal years ended September 30, 2015, 2016, and 2017.

In connection with certain of our workers’ compensation insurance policies, we maintain standby letters of credit for our insurance carriers in the amount of $1.1 million relating primarily to retained risk on our workers compensation claims.

We are subject to federal and state environmental regulations, including rules relating to air and water pollution and the storage and disposal of gasoline, oil, other chemicals and waste. We believe that we are in compliance with such regulations.

Certain of our facilities in Florida and the British Virgin Islands suffered damage from Hurricane Irma. In addition, our yacht charter fleet in the British Virgin Islands suffered inventory damage. With the exception of the British Virgin Islands, the damage to these facilities resulted in only minor interruptions of sales and service activities at those facilities. We maintain insurance for property damage, inventory damage, and business interruption, subject to deductibles. Total expenses as a result of damage caused by Hurricane Irma of approximately $2.9 million were recorded in selling, general, and administrative expenses in the consolidated statement of operations for the fiscal year ended September 30, 2017. We cannot currently quantify the complete negative effects of inventory or property damage incurred, nor the potential amount of insurance proceeds we will receive as a result of damage to our facilities and inventory.