Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Activity related to unrecognized tax benefits
Beginning balance	$ 4,378,000	$ 10,419,000	$ 10,419,000
Additions for tax positions related to prior years	30,103,000	0	0
Deductions for tax positions related to prior years	(34,481,000)	(3,969,000)	0
Settlements with taxing authorities	0	(2,072,000)	0
Ending balance	0	4,378,000	10,419,000
(Reversal) charge of Interest and penalties related to income taxes	(6,300,000)	(2,000,000.0)	$ 450,000
Total interest and penalties accrued	$ 0	$ 6,300,000