Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of principal contractual commitments outstanding under our capital leases

The following table summarizes our principal contractual commitments outstanding under our capital leases at December 31, 2018 for the next five years, and in total thereafter (in thousands):

2019	$	1,052
2020	1,052
2021	1,052
2022	909
2023	451
Thereafter	—
Total minimum lease payments	4,516
Less: Amount representing interest	(424)
Present value of capital lease obligations	4,092
Less current portion of capital lease obligations	(883)
Total long-term capital lease obligations	$	3,209

Rental expense

Rental expense was as follows for the periods indicated (in thousands):

	Year Ended December 31,
	2018		2017		2016
Rental expense	$	11,078	$	12,073	$	11,314

Long-term non-cancelable operating leases and terminal arrangements for the next five years

At December 31, 2018, rental obligations under non-cancelable operating leases and terminal arrangements with terms in excess of one year for the next five years and thereafter are payable as follows (in thousands):

2019	$	4,242
2020	2,258
2021	2,107
2022	1,782
2023	1,495
Thereafter	1,488
Total operating lease payments	$	13,372

Schedule of expenses and losses incurred but not reported

The amount of pre-funded insurance premiums left to cover potential future losses and our accruals for automobile and workers’ compensation claims were as follows at the dates indicated (in thousands):

	December 31,
	2018		2017
Pre-funded premiums for losses incurred but not reported	$	427	$	988
Accrued automobile and workers’ compensation claims	2,246		450

Schedule of accrued medical claims

Medical accrual amounts were as follows at the dates indicated (in thousands):

	December 31,
	2018		2017
Accrued medical claims	$	1,181	$	1,329