Cash Flows (Tables)

12 Months Ended

Dec. 31, 2018

Supplemental Cash Flow Elements [Abstract]

Schedule of Cash Payments for Interest on Indebtedness and Cash Payments for Taxes on Income

Cash payments for interest on indebtedness and cash payments for taxes on income were as follows (in thousands):

	Years Ended December 31,
	2018		2017		2016
Supplemental disclosures of cash flow information:
Cash paid during the year for interest	$	10,155	$	10,976	$	3,782
Cash paid during the year for income taxes, net of    refunds	$	31,218	$	55,470	$	39,051