Background and Basis of Presentation (Tables)

12 Months Ended

Dec. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of supplemental cash flow information

The following table presents additional supplemental cash flow information for the year ended December 31, 2019, 2018 and 2017 (in thousands):

	FOR THE YEAR ENDED DECEMBER 31,
SUPPLEMENTAL CASH FLOW INFORMATION:	2019		2018			2017
Interest paid	$	7,886	$	4,740		$	4,740
Income taxes paid, including foreign withholding taxes	24,229		33,904			66,793
Non-cash investing and financing activities:
Dividend payable	10,746		11,627			12,156
Increases in noncontrolling interests	13,750		—			—
Non-cash acquisition of patents	22,500		—			32,500
Accrued capitalized patent costs and property and equipment	1,619		(2,789		)	1