Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020		Jun. 30, 2019
Balance at beginning of period	$ 108,844	$ 372,365	$ 397,340	[1]	$ 353,667
Change in accumulated other comprehensive income	3,645	0	(27,001)		0
Balance at end of period	589,100	144,682	589,100		144,682
Accumulated Other Comprehensive Income (Loss) [Member]
Balance at beginning of period	(25,756)	0	4,890		0
Change in accumulated other comprehensive income	3,645		(27,001)
Balance at end of period	(22,111)	$ 0	(22,111)		$ 0
Foreign Currency [Member]
Balance at beginning of period	(25,756)		4,890
Change in accumulated other comprehensive income	3,645		(27,001)
Balance at end of period	$ (22,111)		$ (22,111)

[1] The balance sheet at December 31, 2019, has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by United States generally accepted accounting principles for complete financial statements.