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Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	7. Commitments and Contingencies The Company has entered into various non-cancelable operating leases, primarily related to its facilities and certain office equipment used in the ordinary course of business. The Company leases two properties owned by related parties. Rent expense for these two properties was $0.3 million for the three months ended June 30, 2016 and 2015. Rent expense for these two properties was $0.6 million for the six months ended June 30, 2016 and 2015. The Company carries large retention policies for its workers’ compensation liability exposures. The workers' compensation loss reserves are based upon an actuarial report obtained from a third party and determined based on claims filed and claims incurred but not reported. The Company accounts for claims incurred but not yet reported based on estimates derived from historical claims experience and current trends of industry data. Changes in estimates, differences in estimates, and actual payments for claims, are recognized in the period that the estimates changed or the payments were made. The workers' compensation loss reserves were approximately $1.5 million and $1.8 million, net of anticipated insurance and indemnification recoveries of $12.7 million and $13.2 million, at June 30, 2016 and December 31, 2015, respectively. The Company has unused stand-by letters of credit to secure obligations for workers’ compensation claims with various insurance carriers. The unused stand-by letters of credit at June 30, 2016 and December 31, 2015 were $3.5 million. The Company is subject to contingent consideration agreements entered into in connection with certain of its acquisitions. The contingent consideration liability at June 30, 2016 was $5.8 million (see "Note 8. Fair Value Measurements"). Certain employees participate in the Company’s Change in Control Severance Plan, or have separate agreements that provide for certain benefits in the event of termination at the Company's convenience or following a change in control, as defined by the plan or agreement. Generally, these benefits are based on the employee’s length of service and position with the Company and include, severance, continuation of health insurance and in certain cases acceleration of vesting of option or stock awards. Legal Proceedings The Company is involved in various legal proceedings, claims and litigation arising in the ordinary course of business. Based on the facts currently available, the Company does not believe that the disposition of matters that are pending or asserted will have a material effect on its condensed consolidated financial statements.