2. Acquisitions The results of operations for our acquisitions have been included in our consolidated financial statements from the respective dates of acquisition. HDI Holdings, Inc. In December 2011, we purchased all of the issued and outstanding common stock of privately-held HDI for an aggregate consideration of $370.4 million, of which $366.6 million was cash. $40.0 million of the purchase price was placed in an indemnity escrow account through November 7, 2012, at which time, $36.6 million was released. The remainder is being held in escrow pending the disposition of a potential covered loss. In connection with acquisition, we issued replacement option awards with an aggregate fair value of $14.3 million, of which $3.8 million is attributable to the purchase price. The fair value of the replacement option awards and the amount included in the purchase price was calculated using a Black-Scholes model as of the acquisition date. These awards have vesting schedules of 1-48 months and the portion of the fair value of these awards that is not attributable to the purchase price is being expensed over the applicable vesting period. Based in Las Vegas, Nevada, HDI provides improper payment identification services for government and commercial health plans, and is the Medicare RAC in CMS Region D, covering 17 states and three U.S. territories. HDI offers a comprehensive suite of claims integrity services, including complex medical reviews, automated reviews, hospital bill audits, and pharmacy audits. The following table summarizes the estimated fair values of the assets acquired and liabilities assumed at the acquisition date ( in thousands ): December 16, 2011 (As initially reported) Measuring Period Adjustments December 16, 2011 (As Adjusted) Cash and cash equivalents $ 15,113 $ 15,113 Accounts receivable 13,190 13,190 Other current assets 1,358 1,358 Deferred income taxes 4,454 4,454 Property, plant and equipment 74,741 398 75,139 Intangible assets 119,500 1,600 121,100 Other assets 45 45 Total identifiable asset