Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Future Minimum Annual Lease Payments under Capital and Operating Leases with Non-cancelable Terms in Excess of One Year

Future minimum annual lease payments under capital and operating leases with noncancelable terms in excess of one year as of December 31, 2018, are as follows (in thousands):

	Capital Leases		Operating Leases
2019	$	2,072	$	39,047
2020	2,053		29,788
2021	2,020		21,294
2022	1,962		14,352
2023	1,942		10,072
Thereafter	10,648		13,294
Total future minimum lease obligation	$	20,697	$	127,847