BUSINESS ACQUISITIONS AND RESTRUCTURING CHARGES Acquisitions We acquired various solid waste businesses during the three months ended March 31, 2013 and 2012 . The purchase price paid for these acquisitions during those periods and the preliminary allocation of the purchase price as of March 31 follow: 2013 2012 Purchase price: Cash used in acquisitions, net of cash acquired $ 10.2 $ 19.7 Holdbacks 1.0   Total 11.2 19.7 Allocated as follows: Working capital 0.2 (0.9 ) Property and equipment 2.4 4.4 Other liabilities, net (0.4 )   Value of assets acquired and liabilities assumed 2.2 3.5 Excess purchase price to be allocated $ 9.0 $ 16.2 Excess purchase price allocated as follows: Other intangible assets $ 1.0 $ 5.8 Goodwill 8.0 10.4 Total allocated $ 9.0 $ 16.2 Substantially all of the goodwill and intangible assets recorded for these acquisitions are deductible for tax purposes. The pro forma effect of these acquisitions, individually and collectively, was not material. Restructuring Charges During 2012, we restructured our field and corporate operations to create a more efficient and competitive company. These changes included consolidating our field regions from four to three and our areas from 28 to 20 , relocating office space, and reducing administrative staffing levels. During the three months ended March 31, 2013 , we incurred $4.9 million of restructuring charges, which consisted of severance and other employee termination benefits, relocation benefits, and the closure of offices with lease agreements with non-cancellable terms. During the three months ended March 31, 2013 , we paid $7.2 million related to these restructuring charges. As of March 31, 2013 , $6.7 million remains accrued for severance and other employee termination benefits and lease exit costs. We expect to incur approximately $10 million of additional expense during the remainder of 2013 to complete such activities. Substantially all of these charges were or will be recorded in our corporate segment, and we expect the charges will be paid