Employee Benefit Plans and Insurance

We maintain a 401(k) retirement plan for our eligible employees. Under this plan, we may make a matching contribution, on a discretionary basis, equal to a percentage of each eligible employee’s annual contribution, which we determine annually. Our matching contributions for the years ended December 31, 2018, 2017 and 2016 were $4.6 million, $3.1 million and $0.3 million, respectively. In an effort to reduce costs in response to the downturn in our industry, we suspended matching contributions from February 2016 to January 2017.

We use a combination of self-insurance and third-party insurance for various types of coverage. We are self-insured for up to $500,000 per incident for all workers’ compensation claims submitted by employees for on-the-job injuries. We accrue our workers’ compensation claim cost estimates using an actuarial calculation that is based on industry and our company’s historical claim development data, and we accrue the cost of administrative services associated with claims processing. We maintain a self-insurance program for major medical and hospitalization coverage for employees and their dependents, which is partially funded by employee payroll deductions. We have a maximum health insurance liability of $200,000 per covered individual per year, while amounts in excess of this maximum are covered under a separate policy provided by an insurance company. We have provided for reported claims costs as well as incurred but not reported medical costs in the accompanying consolidated balance sheets. We also have a deductible of $250,000 per occurrence under both our general liability insurance and auto liability insurance.

Accrued insurance premiums and deductibles related to our estimate of the self-insured portion of costs associated with our health, workers’ compensation, general liability and auto liability insurance are as follows:



	As of December 31,
	2018		2017
Workers’ compensation	$	2,992	$	3,689
Health insurance	1,834		2,046
General liability and auto liability	656		1,007
	$	5,482	$	6,742

Based upon our past experience, management believes that we have adequately provided for potential losses. However, future multiple occurrences of serious injuries to employees could have a material adverse effect on our financial position and results of operations.

Our insurance recoveries receivables and our accrued liability for insurance claims and settlements represent our estimate of claims in excess of our deductible, which are covered and managed by our third-party insurance providers, some of which may ultimately be settled by the insurance provider in the long-term. These are presented in our consolidated balance sheets as current due to the uncertainty in the timing of reporting and payment of claims.