Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Revaluation of deferred tax assets due to tax rate change	$ 352		$ 0	$ 352	$ 0
Net tax benefit	(22)		(879)	1,421	(767)
Provision for/resolution of tax audits and contingencies, net	0		(1,489)	278	(1,733)
Write-off of net operating losses related to tax audit	$ 0		0	$ 0	$ 1,830
Deferred income tax expense (benefit)			$ 1,000
Deferred federal income tax expense (benefit)		$ 1,800