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 $7.1 million, $8.3 million, and $8.4 million for the fiscal years ended September 30, 2016, 2017, and 2018, respectively.

Future minimum lease payments under non-cancelable operating leases as of September 30, 2018, were as follows:

	(Amounts in thousands)
2019		7,296
2020		7,077
2021		6,077
2022		4,961
2023		4,835
Thereafter		25,361
Total	$	55,607

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.

In connection with certain of our workers’ compensation insurance policies, we maintain standby letters of credit for our insurance carriers in the amount of $1.4 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.