In March 2015, we also began operating under a new contract with the Texas HHSC and the Centers for Medicare and Medicaid Services to serve dual-eligible members in three counties as part of the state's dual demonstration program.
At December 31, 2015, we served 449,000 members in Medicaid expansion programs in eight states compared to 201,300 members at December 31, 2014 in six states, included in the table above.
Cost of services expense includes the pharmaceutical costs associated with our pharmacy benefit manager and specialty pharmacy's external revenues and certain direct costs to support the functions responsible for generation of our service revenues. These expenses consist of the salaries and wages of the professionals who provide the services and associated expenses.
Our subsidiary, Kentucky Spirit Health Plan (KSHP), ceased serving Medicaid members in Kentucky as of July 6, 2013. Accordingly, the results of operations for KSHP are classified as discontinued operations for all periods presented in our consolidated financial statements. The following discussion and analysis is presented primarily in the context of continuing operations unless otherwise identified.
Cash flows used in investing activities in 2014 primarily consisted of additions to the investment portfolio of our regulated subsidiaries, including transfers from cash and cash equivalents to long term investments, the acquisition of U.S. Medical Management and CHS, an equity investment in Ribera Salud and capital expenditures. We completed the acquisition of U.S. Medical Management for $213 million in total consideration. The transaction was financed through a combination of Centene common stock as well as $80 million of cash. We also completed a transaction with CHS for initial cash consideration of $56 million as well as common stock. Additionally, we purchased a noncontrolling interest in Ribera Salud, S.A. (Ribera Salud), a Spanish health management group for $17 million. During 2013, our investing activities primarily related to additions to the investment portfolio of our regulated subsidiaries, including transfers from cash and cash equivalents to long term investments, the acquisition of AcariaHealth and capital expenditures. We completed the acquisition of AcariaHealth for $142 million in total consideration. The transaction was financed through a combination of Centene common stock as well as $67 million of cash.
The $500 million revolving credit agreement contains non-financial and financial covenants, including requirements of minimum fixed charge coverage ratios, maximum debt-to-EBITDA ratios and minimum tangible net worth. We are required not to exceed a maximum debt-to-EBITDA ratio of 3.0 to 1.0. As of December 31, 2015, we had $225 million in borrowings outstanding under our revolving credit facility, and we were in compliance with all covenants. As of December 31, 2015, there were no limitations on the availability under the revolving credit agreement as a result of the debt-to-EBITDA ratio.
We apply various estimation methods depending on the claim type and the period for which claims are being estimated. For more recent periods, incurred non-inpatient claims are estimated based on historical per member per month claims experience adjusted for known factors. Incurred hospital inpatient claims are estimated based on known inpatient utilization data and prior claims experience adjusted for known factors. For older periods, we utilize an estimated completion factor based on our historical experience to develop IBNR estimates. The completion factor is an actuarial estimate of the percentage of claims incurred during a given period that have been received or adjudicated as of the reporting period to the estimate of the total ultimate incurred costs. When we commence operations in a new state or region, we have limited information with which to estimate our medical claims liability. See “Risk Factors - Failure to accurately predict our medical expenses could negatively affect our financial position, results of operations or cash flows.” These approaches are consistently applied to each period presented.
In May 2014, the FASB issued an ASU which supersedes existing revenue recognition standards with a single model unless those contracts are within the scope of other standards (e.g., an insurance entity's insurance contracts). Under the new standard, recognition of revenue occurs when a customer obtains control of promised goods or services in an amount that reflects the consideration which the entity expects to receive in exchange for those goods or services. In addition, the standard requires disclosure of the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. The new effective date is for annual and interim periods beginning after December 15, 2017. Early adoption is permitted. The Company is currently evaluating the effect of the new revenue recognition guidance.
LiveHealthier, Inc. In January 2015, the Company acquired the remaining 79% of LiveHealthier, Inc. (LiveHealthier) for $28 million , bringing its total ownership to 100%. LiveHealthier is a provider of technology and service-based health management solutions. The fair value of consideration of $28 million consists of cash paid of $11 million, Centene common stock issued at closing of $13 million, and the fair value of estimated contingent consideration of $4 million to be paid in cash over a three year period. The contingent consideration will not exceed $9 million.
As a result of put option agreements, noncontrolling interest is considered redeemable and is classified in the Redeemable Noncontrolling Interest section of the consolidated balance sheets. Noncontrolling interest is initially measured at fair value using the binomial lattice model as of the acquisition date. The Company has elected to accrete changes in the redemption value through additional paid-in capital over the period from the date of issuance to the earliest redemption date following the effective interest method.
The contractual maturities of short term and long term investments and restricted deposits are as follows ($ in millions):
The change in medical claims liability is summarized as follows ($ in millions):
The total fair value of restricted stock and restricted stock units vested during the years ended December 31, 2015, 2014 and 2013, was $112 million, $82 million and $49 million, respectively.
On July 5, 2013, the Company's subsidiary, Kentucky Spirit Health Plan, Inc. (Kentucky Spirit), terminated its contract with the Commonwealth of Kentucky (the Commonwealth). Kentucky Spirit believes it had a contractual right to terminate the contract and filed a lawsuit in Franklin Circuit Court seeking a declaration of this right. The Commonwealth has alleged that Kentucky Spirit's exit constitutes a material breach of contract. The Commonwealth seeks to recover substantial damages and to enforce its rights under Kentucky Spirit's $25 million performance bond. The Commonwealth's attorneys have asserted that the Commonwealth's expenditures due to Kentucky Spirit's departure range from $28 million to $40 million plus interest, and that the associated CMS expenditures range from $92 million to $134 million. Kentucky Spirit disputes the Commonwealth's alleged damages, and filed a lawsuit in April 2013, amended in October 2014, in Franklin Circuit Court seeking damages against the Commonwealth for losses sustained due to the Commonwealth's alleged breaches.
On May 26, 2015, the Commonwealth issued a demand for indemnification to its actuarial firm, for "all defense costs, and any resultant monetary awards in favor of Kentucky Spirit, arising from or related to Kentucky Spirit's claims which are predicated upon the alleged omissions and errors in the Data Book and the certified actuarially sound rates." On August 19, 2015, the actuarial firm moved to intervene in the litigation. The Franklin Circuit Court granted the actuarial firm's motion on September 8, 2015 and ordered a forty-five day stay of all pretrial proceedings in order for the firm to review the record. Also, on August 19, 2015, the actuarial firm filed a petition seeking a declaratory judgment that it is not liable to the Commonwealth for indemnification related to the claims asserted by Kentucky Spirit against the Commonwealth. On October 5, 2015, the Commonwealth filed an answer to the actuarial firm's petition and asserted counterclaims/cross-claims against the firm.
During 2015, 2014 and 2013, the Registrant received dividends from its subsidiaries totaling $14 million, $54 million and $21 million, respectively.