Segment and Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Total revenues	$ 330,984	$ 322,432	$ 663,377	$ 622,325
Total long-lived assets	716,073		716,073		$ 778,507
Disposal Group, Held-for-sale, Not Discontinued Operations
Disposal Group, Including Discontinued Operations, Long-Lived Assets	2,800		2,800
UNITED STATES
Total revenues	261,157	253,234	531,466	484,577
Total long-lived assets	636,599		636,599		701,580
CANADA
Total revenues	17,000	17,300	33,570	34,353
IRELAND
Total revenues	12,570	15,440	25,573	31,063
All Other Countries [Member]
Total revenues	40,257	$ 36,458	72,768	$ 72,332
Total long-lived assets	$ 79,474		$ 79,474		$ 76,927