The Company leases certain service facilities and equipment. Rent expense was $23.2 million, $21.1 million, and $18.1 million for the years ended December 31, 2018, 2017 and 2016, respectively.

At December 31, 2018, the Company was committed under non-cancellable operating lease agreements requiring minimum annual rentals payable as follows (in thousands):

	Amount
2019	$	21,285
2020		16,978
2021		14,159
2022		11,482
2023		8,215
Thereafter		22,531
Total	$	94,650

Management expects that in the normal course of business, leases will be renewed or replaced as they expire.

Capital expenditures committed were $25.6 million at December 31, 2018. As of December 31, 2018 and 2017, the Company had $22.0 million and $11.2 million, respectively, of capital expenditures in accounts payable.

The Company pays its pro rata share of the cost of letters of credit outstanding for certain workers’ compensation claims incurred prior to March 1, 2000 that Saia’s former parent maintains for insurance programs. The Company’s pro rata share of these outstanding letters of credit was $1.8 million at December 31, 2018 and 2017.

The Company is subject to legal proceedings that arise in the ordinary course of its business. Management believes that adequate provisions for resolution of all contingencies, claims and pending litigation have been made for probable and estimable losses and that the ultimate outcome of these actions will not have a material adverse effect on its financial condition but could have a material adverse effect on its results of operations in a given quarter or annual period.