Other Income (Expense), Net Other Income (Expense), Net (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Nonoperating Income (Expense), Net - Total	$ (13,000)	$ 7,096,000	$ (26,225,000)	$ 24,206,000
Gain (Loss) on Disposition of Assets			0	(11,000)
Other Nonoperating Income (Expense), Net - Other	(19,000)	(4,000)	(131,000)	24,000
Other Nonoperating Expense	(1,294,000)	0	(1,294,000)	0
kaleo [Member]
Other Interest and Dividend Income		17,600,000		17,600,000
Unrealized Gain (Loss) on Investments - kaleo	$ 1,300,000	$ 7,100,000	$ (24,800,000)	$ 24,182,000