Summary of Quarterly Results (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Data Tables [Abstract]

Schedule Of Quarterly Financial Information Table Text Block

						Net Income
						Attributable		Net Income Per
						to Common		Common Share (2)
	(Amounts in thousands, except per share amounts)			Revenues		Shareholders (1)		Basic		Diluted
		2012
			December 31	$	697,654	$	62,633	$	0.34	$	0.33
			September 30		710,538		232,393		1.25		1.24
			June 30		683,985		20,510		0.11		0.11
			March 31		674,280		233,735		1.26		1.25
		2011
			December 31	$	689,959	$	69,508	$	0.38	$	0.37
			September 30		689,190		41,135		0.22		0.22
			June 30		679,084		91,913		0.50		0.49
			March 31		674,603		399,215		2.17		2.12
_______________________________
	(1)		Fluctuations among quarters resulted primarily from non-cash impairment losses, mark-to-market of derivative instruments, net gains on sale of real estate and from seasonality of business operations.
	(2)		The total for the year may differ from the sum of the quarters as a result of weighting.