Commitments and Contingencies

The Company leases its facilities and certain office equipment under operating leases, which expire at various dates through 2025. Certain leases contain rent escalations or renewal options or both. Rent expense for all significant leases is recognized on a straight-line basis. Rent expense is included in SG&A expenses and was $26.4 million, $25.6 million and $21.6 million in 2017, 2016 and 2015, respectively. The balance of the deferred rent liability reflected in other current liabilities in the accompanying consolidated balance sheets was $1.2 million and $0.6 million at December 31, 2017 and 2016, respectively, and the balance reflected in other long-term liabilities was $5.0 million and $5.2 million, at December 31, 2017 and 2016, respectively.

The following is a summary of the Company's specified contractual cash obligations as of December 31, 2017, excluding current liabilities that are included in the consolidated balance sheet (in thousands):



	Operating Leases		Related Party Leases		Purchase Obligations		Total
2018	$	20,387	$	1,302	$	10,283	$	31,972
2019	17,520		1,282		8,362		27,164
2020	14,698		1,314		1,055		17,067
2021	12,146		1,347		—		13,493
2022	8,089		1,380		—		9,469
Thereafter	7,267		2,618		—		9,885
Total	$	80,107	$	9,243	$	19,700	$	109,050

As a result of the Apex Systems acquisition, the Company leases two properties owned by certain board members and an executive of the Company. Rent expense for these two properties was $1.3 million for each of the years 2017, 2016 and 2015.

Purchase obligations are non-cancelable job board service agreements, software maintenance and license agreements and software subscriptions.

The workers' compensation loss reserves were $2.1 million and $1.8 million, net of anticipated insurance and indemnification recoveries of $12.7 million and $14.0 million, at December 31, 2017 and 2016, respectively. The Company has 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 December 31, 2017 and December 31, 2016 were $4.4 million and $4.0 million, respectively.

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 consolidated financial statements.