Income Taxes (Summary of Income Tax Benefit (Provision)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Taxes [Abstract]
Current income tax provision	$ (294)	$ (262)	$ (923)	$ (1,209)
Deferred income tax benefit (provision)	1,123	(47)	2,175	253
Income tax benefit (provision)	$ 829	$ (309)	$ 1,252	$ (956)