Income Taxes (Reconciliation of Statutory Rate to Effective Tax Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Continuing operations:
Provisions using statutory federal income tax rate	$ 36,476	$ 31,340	$ 53,175
State income taxes (benefit), net of federal tax benefit	2,421	1,915	(776)
REIT benefit	(22,395)	(19,992)	(43,554)
Change in valuation allowance	1,456	(1,245)	2,055
Federal tax credits	(2,118)	(1,904)	(2,016)
Tax Cut and Jobs Act impact	0	(301)	9,584
Foreign income taxes (benefit)	1,934	1,479	(1,830)
Other, net	(1,126)	2,825	1,320
Total provision for income taxes	$ 16,648	$ 14,117	$ 17,958