Segment and Geographic Information (Tables)

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Summary of Revenue and Long-lived Assets

Information regarding revenue for the three years ended December 31, 2018, 2017 and 2016 and long-lived assets as of December 31, 2018 and 2017 follows:

	Year Ended December 31,
	2018		2017		2016
	(In thousands)
Revenues
United States	$	367,373	$	332,982	$	312,304
United Kingdom		66,241		58,991		53,865
Other		1,951		1,449		1,561
Total	$	435,565	$	393,422	$	367,730

	As of December 31,
	2018		2017
	(In thousands)
Long-lived assets, as defined
United States	$	55,200	$	27,990
United Kingdom		7,787		10,532
Other		23		26
Total	$	63,010	$	38,548