Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Data [Line Items]

Schedule of Quarterly Financial Information

The following unaudited quarterly data has been prepared on the basis of a December 31 year-end.  Amounts are in thousands, except for per share amounts.

	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
2019 (1)	3/31		6/30		9/30		12/31
Total revenues	$	662,494	$	669,517	$	685,145	$	683,919
Operating income		209,969		369,260		368,363		408,952
Net income *		109,257		321,299		277,846		301,306
Net income available to Common Shares		103,766		308,196		266,333		288,992
Earnings per share:
Net income available to Common Shares - basic	$	0.28	$	0.83	$	0.72	$	0.78
Net income available to Common Shares - diluted	$	0.28	$	0.83	$	0.71	$	0.77

	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
2018 (1)	3/31		6/30		9/30		12/31
Total revenues	$	633,016	$	639,808	$	652,867	$	652,743
Operating income		339,082		217,603		339,403		219,282
Net income *		220,548		118,410		223,846		122,388
Net income available to Common Shares		211,036		112,830		214,164		116,415
Earnings per share:
Net income available to Common Shares - basic	$	0.57	$	0.31	$	0.58	$	0.32
Net income available to Common Shares - diluted	$	0.57	$	0.31	$	0.58	$	0.31

* The Company did not have any discontinued operations, extraordinary items or cumulative effect of change in accounting principle during the periods presented.  Therefore, income from continuing operations and income before extraordinary items and cumulative effect of change in accounting principle are not shown as they were both equal to the net income amounts disclosed above.

(1) Amounts may not equal full year results due to rounding.

ERPOP [Member]

Quarterly Financial Data [Line Items]

Schedule of Quarterly Financial Information

The following unaudited quarterly data has been prepared on the basis of a December 31 year-end.  Amounts are in thousands, except for per Unit amounts.

	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
2019 (1)	3/31		6/30		9/30		12/31
Total revenues	$	662,494	$	669,517	$	685,145	$	683,919
Operating income		209,969		369,260		368,363		408,952
Net income *		109,257		321,299		277,846		301,306
Net income available to Units		107,685		319,706		276,243		299,687
Earnings per Unit:
Net income available to Units - basic	$	0.28	$	0.83	$	0.72	$	0.78
Net income available to Units - diluted	$	0.28	$	0.83	$	0.71	$	0.77

	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
2018 (1)	3/31		6/30		9/30		12/31
Total revenues	$	633,016	$	639,808	$	652,867	$	652,743
Operating income		339,082		217,603		339,403		219,282
Net income *		220,548		118,410		223,846		122,388
Net income available to Units		219,095		117,129		222,323		120,837
Earnings per Unit:
Net income available to Units - basic	$	0.57	$	0.31	$	0.58	$	0.32
Net income available to Units - diluted	$	0.57	$	0.31	$	0.58	$	0.31

* The Operating Partnership did not have any discontinued operations, extraordinary items or cumulative effect of change in accounting principle during the periods presented.  Therefore, income from continuing operations and income before extraordinary items and cumulative effect of change in accounting principle are not shown as they were both equal to the net income amounts disclosed above.

(1) Amounts may not equal full year results due to rounding.