Leases (Tables)

12 Months Ended

Dec. 31, 2018

Leases [Abstract]

Operating Leases of Lessee Disclosure

Minimum payments due in future years under these agreements in effect at December 31, 2018 are as follows:

	Operating
	Leases		Royalties
	(In thousands)
2019	$	3,681	$	3,669
2020	2,260		8,096
2021	1,985		8,296
2022	2,024		8,086
2023	2,044		7,749
Thereafter	6,248		84,913
	$	18,242	$	120,809