Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Annual Commitments

Future Minimum Annual Commitments at June 30, 2018(in thousands):

Year ending December 31,	Operating Lease Minimum Rental Payments		Minimum Purchase Commitments
2018	$	39,115	$	12,413
2019	73,080		21,037
2020	57,683		15,663
2021	38,639		8,008
2022	31,652		5,640
Thereafter	61,790		4,141
Total future lease and purchase commitments	$	301,959	$	66,902