COMMITMENTS AND CONTINGENCIES Litigation Various suits and claims arising in the ordinary course of business are pending against us. We conduct business throughout the continental United States and may be subject to jury verdicts or arbitrations that result in outcomes in favor of the plaintiffs. We are also exposed to various claims abroad. We continually assess our contingent liabilities, including potential litigation liabilities, as well as the adequacy of our accruals and our need for the disclosure of these items. We establish a provision for a contingent liability when it is probable that a liability has been incurred and the amount is reasonably estimable. We have $2.2 million of other liabilities related to litigation that is deemed probable and reasonably estimable as of March 31, 2013 . We do not believe that the disposition of any of these matters will result in an additional loss materially in excess of amounts that have been recorded. Self-Insurance Reserves We maintain reserves for workers  compensation and vehicle liability on our balance sheet based on our judgment and estimates using an actuarial method based on claims incurred. We estimate general liability claims on a case-by-case basis. We maintain insurance policies for workers  compensation, vehicle liability and general liability claims. These insurance policies carry self-insured retention limits or deductibles on a per occurrence basis. The retention limits or deductibles are accounted for in our accrual process for all workers  compensation, vehicular liability and general liability claims. As of March 31, 2013 and December 31, 2012 , we have recorded $68.1 million and $69.4 million , respectively, of self-insurance reserves related to workers  compensation, vehicular liabilities and general liability claims. Partially offsetting these liabilities, we had $20.3 million and $20.6 million of insurance receivables as of March 31, 2013 and December 31, 2012 , respectively. We believe that the liabilities we have recorded are appropriate bas