Organization and Summary of Significant Accounting Policies - Other Assets (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Apr. 06, 2018	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Assets
Deferred compensation plan assets		$ 15,053	$ 15,053	$ 11,716
Investments in privately held companies		17,129	17,129	22,530
Long-term notes receivable		2,722	2,722	13,504
Other		6,557	6,557	9,829
Total Other Assets		41,461	41,461	57,579
Impairment and other charges			23,750	$ 657	$ 809
NinePoint Medical, Inc.
Other Assets
Option to purchase outstanding equity, up to	100.00%
Total purchase price	$ 10,000
Loan from acquisition	$ 10,500
Interest rate on loan	9.00%
Impairment and other charges		20,500	20,500
Write off of accrued interest		$ (1,600)	$ (1,600)