Summary of Quarterly Results (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Data [Abstract]

Schedule Of Quarterly Financial Information Table Text Block

						Net Income (Loss)
						Attributable		Net Income (Loss) Per
						to Common		Common Share (2)
	(Amounts in thousands, except per share amounts)			Revenues		Shareholders (1)		Basic		Diluted
		2014
			December 31	$	679,101	$	513,238	$	2.73	$	2.72
			September 30		657,209		131,159		0.70		0.69
			June 30		652,972		76,642		0.41		0.41
			March 31		646,658		62,349		0.33		0.33
		2013
			December 31	$	649,403	$	(68,887)	$	(0.37)	$	(0.37)
			September 30		655,883		83,005		0.44		0.44
			June 30		658,550		145,926		0.78		0.78
			March 31		705,433		231,990		1.24		1.24
_______________________________
	(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.