Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of principal contractual commitments outstanding under capital leases

The following table summarizes our principal contractual commitments outstanding under our capital leases at June 30, 2018 for the next five years, and in total thereafter (in thousands):

Remainder of 2018	$	199
2019	398
2020	398
2021	398
2022	255
Thereafter	—
Total minimum lease payments	1,648
Less: Amount representing interest	(126)
Present value of capital lease obligations	1,522
Less current portion of capital lease obligations	(345)
Total long-term capital lease obligations	$	1,177

Rental expense

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

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
Rental expense	$	2,835	$	3,230	$	5,422	$	6,458

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

At June 30, 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):

Remainder of 2018	$	2,986
2019	3,336
2020	1,641
2021	1,531
2022	1,499
Thereafter	2,966
Total operating lease payments	$	13,959

Schedule of expenses and losses incurred but not reported and accrued workers' compensation

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):

	June 30,		December 31,
	2018		2017
Pre-funded premiums for losses incurred but not reported	$	516	$	988
Accrued automobile and workers’ compensation claims	1,262		450

Schedule of accrued medical claims

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

	June 30,		December 31,
	2018		2017
Accrued medical claims	$	1,439	$	1,329