The Company makes commitments in the normal course of business. The Company leases equipment, vehicles and facilities under non-cancelable operating leases, some of which contain renewal options. Total future minimum lease payments consisted of the following at December 31, 2018:

	Total leases
	(In thousands)
2019	$	3,371
2020		2,785
2021		2,219
2022		1,221
2023		1,191
Thereafter		2,190
Total lease obligations	$	12,977

Total rental expense charged to operations under all operating leases was $3.7 million, $3.6 million and $3.3 million in 2018, 2017 and 2016, respectively.

In the normal course of business, the Company is named in legal proceedings. There are currently no material legal proceedings pending with respect to the Company.

The Company is subject to contingencies related to environmental laws and regulations. A future change in circumstances with respect to specific matters or with respect to sites formerly or currently owned or operated by the Company, off-site disposal locations used by the Company, and property owned by third parties that is near such sites, could result in future costs to the Company and such amounts could be material. Expenditures for compliance with environmental control provisions and regulations during 2018, 2017 and 2016 were not material.

The Company relies on single suppliers for most brass castings and certain resin and electronic subassemblies in several of its product lines. The Company believes these items would be available from other sources, but that the loss of certain suppliers would result in a higher cost of materials, delivery delays, short-term increases in inventory and higher quality control costs in the short term. The Company attempts to mitigate these risks by working closely with key suppliers, purchasing minimal amounts from alternative suppliers and by purchasing business interruption insurance where appropriate.

The Company reevaluates its exposures on a periodic basis and makes adjustments to reserves as appropriate.