Income Taxes (Summary of Income Tax Benefit (Provision)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Taxes [Abstract]
Current income tax provision	$ (289)	$ (400)	$ (629)	$ (947)
Deferred income tax benefit (provision)	490	1,869	1,052	300
Income tax benefit (provision)	$ 201	$ 1,469	$ 423	$ (647)