Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments And Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments Under Non-cancelable Operating Leases

Future minimum payments, by year and in the aggregate, under non-cancellable operating leases with initial or remaining lease terms of one year or more, are as follows:

(Thousands)
2019	$	10,585
2020		7,543
2021		4,815
2022		3,186
2023		2,382
Thereafter		15,269
Total	$	43,780