Income Taxes (Reconciliation of Statutory Rate to Effective Tax Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Continuing operations:
Provisions using statutory federal income tax rate	$ 49,410	$ 53,239	$ 29,801
State income taxes (benefit), net of federal tax benefit	(322)	2,510	1,104
REIT Benefit	(42,536)	(44,538)	(34,454)
Impact of REIT election	0	0	(14,946)
Change in contingent tax liabilities	(395)	(576)	(5,701)
Change in valuation allowance	3,702	664	(802)
Other, net	(2,470)	2,794	(1,052)
Total provision (benefit) for income taxes	$ 7,389	$ 14,093	$ (26,050)