Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Contingency [Line Items]
Deferred income tax (provision) benefit	$ (47)	$ 506	$ 253	$ (2,802)
Unrecognized tax benefits	43,000		43,000
Accrued tax penalties	0		0
Unrecognized tax benefits, interest on income taxes accrued	3,100		3,100
Unrecognized tax benefits that would reduce the income tax provision	8,100		8,100
Federal Coronavirus Aid Relief Economic Security Act[Member]
Income Tax Contingency [Line Items]
Deferred income tax (provision) benefit	$ 2,200		$ 5,700