Supplemental Consolidated Balance Sheet Information | 7 . SUPPLEMENTAL CONSOLIDATED BALANCE SHEET INFORMATION Accounts Receivable, net The components of accounts receivable were as follows (in thousands): March 31, December 31, 2016 2015 Billed amounts $ 148,921 $ 153,837 Engagements in process 103,134 80,102 Allowance for uncollectible billed amounts (11,015) (9,797) Allowance for uncollectible engagements in process (10,863) (7,482) Accounts receivable, net $ 230,177 $ 216,660 Receivables attributable to engagements in process represent balances for services that have been performed and earned but have not been billed to the client. Services are generally billed on a monthly basis for the prior month’s services. Our allowance for uncollectible accounts is based on historical experience and management judgment and may change based on market conditions or specific client circumstances. Prepaid Expenses and Other Current Assets The components of prepaid expenses and other current assets were as follows (in thousands): March 31, December 31, 2016 2015 Notes receivable - current $ 2,829 $ 3,342 Prepaid recruiting and retention incentives - current 11,020 9,688 Other prepaid expenses and other current assets 19,298 16,699 Prepaid expenses and other current assets $ 33,147 $ 29,729 Other Assets The components of other assets were as follows (in thousands): March 31, December 31, 2016 2015 Notes receivable - non-current $ 2,119 $ 4,420 Capitalized client-facing software 1,406 1,567 Prepaid recruiting and retention incentives - non-current 15,256 14,009 Prepaid expenses and other non-current assets 2,262 2,535 Other assets $ 21,043 $ 22,531 Notes receivable, current and non-current, represent unsecured employee loans. These loans were issued to recruit or r etain certain senior-level client-service employees . During the three months ended March 31, 2016 and 2015, no such loans were issued. The principal amount and accrued interest on these loans is either paid by the employee or forgiven by us over the term of the loans so long as the employee remains continuously employed by us and complies with certain contractual requirements. The expense associated with the forgiveness of the principal amount of the loans is amortized as compensation expense over the service period, which is consistent with the term of the loans. Capitalized client-facing software is used by our clients as part of client engagements. These amounts are amortized into cost of services before reimbursable expenses over their estimated remaining useful life. Prepaid recruiting and retention incentives, current and non-current, include sign-on and retention bonuses that are generally recoverable from an employee if the employee voluntarily terminates employment or if the employee’s employment is terminated for “cause” prior to fulfilling his or her obligations to us. These amounts are amortized as compensation expense over the period in which they are recoverable from the employee, generally in periods up to six years. During the three months ended March 31, 2016 and 2015 we granted $6.5 million and $1.6 million, respectively, of sign-on and retention bonuses, which have been included in current and non-current prepaid recruiting and retention incentives. Property and Equipment, net Property and equipment, net consisted of (in thousands): March 31, December 31, 2016 2015 Furniture, fixtures and equipment $ 62,520 $ 63,995 Software 79,935 77,910 Leasehold improvements 43,161 40,560 Property and equipment, at cost 185,616 182,465 Less: accumulated depreciation (109,717) (105,748) Property and equipment, net $ 75,899 $ 76,717 During the three months ended March 31, 2016 , we recorded $ 5.0 million in property and equipment which included $2.0 million in our technology infrastructure and softwa re and $1.0 million in furniture . We also recorded $2.6 million in leasehold improvements ( $0.8 million was non-cash) related to the build-outs of various office spaces. During the three months ended March 31, 2016 , we retired $2.5 million in fully depreciated assets. Other Current Liabilities The components of other current liabilities were as follows (in thousands): March 31, December 31, 2016 2015 Deferred acquisition liabilities $ 10,072 $ 1,665 Deferred revenue 16,702 19,317 Deferred rent - short term 2,983 2,909 Other current liabilities 2,574 8,256 Total other current liabilities $ 32,331 $ 32,147 Other Non-Current Liabilities The components of other non-current liabilities were as follows (in thousands): March 31, December 31, 2016 2015 Deferred acquisition liabilities $ - $ 8,300 Deferred rent - long term 14,453 14,358 Other non-current liabilities 6,618 6,298 Total other non-current liabilities $ 21,071 $ 28,956 D eferred acquisition liabilities , current and non-current, at March 31, 2016 consisted of cash obligations related to definitive and contingent purchase price considerations recorded at net present value and fair value, respectively . During the three months ended March 31, 2016, we made a payment of $5.5 million to the selling members of McKinnis for cash held in the business at closing, which reduced other current liabilities. The current and non-current portion s of deferred rent relates to tenant allowances and incentives on lease arrangements for our office facilities that expire at various dates through 2028 . At March 31, 2016 , other non-current liabilities included $2.4 million of performance-based long-term incentive compensation liabilities. As part of our long-term incentive program for select senior-level client service employees and leaders, we grant restricted stock units which vest three years from the grant date based on the achievement of certain performance targets during the prior year. Deferred revenue represents advance billings to our clients for services that have not yet been performed and earned. |