Liability for Appeals (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2019	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Other Liabilities Disclosure [Abstract]
Release of estimated return obligation liability	$ 10,500	$ 8,400	$ 19,380	$ 8,436