Commitments and Contingencies (Notes)	6 Months Ended
Jun. 30, 2018
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, 2018 and 2017, and $0.6 million for the six months ended June 30, 2018 and 2017. As a result, of the acquisition of ECS, see “Note 4. Acquisitions," the Company assumed various operating lease commitments, for which total future payments are approximately $27.7 million as of June 30, 2018, with the last payment scheduled to be in February 2027. The Company carries retention policies for its workers’ compensation liability exposures. The workers' compensation loss reserves are based upon an actuarial study conducted by a third-party specialist. Changes in estimates and differences between estimates and the actual payments for claims are recognized in the period that the estimates change or the payments are made. The workers' compensation loss reserves were approximately $1.9 million and $2.1 million at June 30, 2018 and December 31, 2017, net of anticipated insurance and indemnification recoveries of $15.1 million and $12.7 million, at June 30, 2018 and December 31, 2017, respectively. We have unused stand-by letters of credit outstanding to secure obligations for workers’ compensation claims with various insurance carriers. The unused stand-by letters of credit at June 30, 2018 and December 31, 2017 were $4.4 million. The Company’s deferred compensation plan liability was $6.1 million at June 30, 2018, and was included in other long-term liabilities. The Company established a rabbi trust to fund the deferred compensation plan, see "Note 8. Fair Value Measurements." Certain employees participate in the Company’s Amended and Restated 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 position with the Company and include severance, continuation of health insurance and a pro rata bonus. Legal Proceedings The Company is involved in various legal proceedings, claims and litigation arising in the ordinary course of business. 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.

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, 2018 and 2017, and $0.6 million for the six months ended June 30, 2018 and 2017.

As a result, of the acquisition of ECS, see “Note 4. Acquisitions," the Company assumed various operating lease commitments, for which total future payments are approximately $27.7 million as of June 30, 2018, with the last payment scheduled to be in February 2027.

The Company carries retention policies for its workers’ compensation liability exposures. The workers' compensation loss reserves are based upon an actuarial study conducted by a third-party specialist. Changes in estimates and differences between estimates and the actual payments for claims are recognized in the period that the estimates change or the payments are made. The workers' compensation loss reserves were approximately $1.9 million and $2.1 million at June 30, 2018 and December 31, 2017, net of anticipated insurance and indemnification recoveries of $15.1 million and $12.7 million, at June 30, 2018 and December 31, 2017, respectively. We have unused stand-by letters of credit outstanding to secure obligations for workers’ compensation claims with various insurance carriers. The unused stand-by letters of credit at June 30, 2018 and December 31, 2017 were $4.4 million.

The Company’s deferred compensation plan liability was $6.1 million at June 30, 2018, and was included in other long-term liabilities. The Company established a rabbi trust to fund the deferred compensation plan, see "Note 8. Fair Value Measurements."

Certain employees participate in the Company’s Amended and Restated 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 position with the Company and include severance, continuation of health insurance and a pro rata bonus.

Legal Proceedings

The Company is involved in various legal proceedings, claims and litigation arising in the ordinary course of business. 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.