Supplemental Information to Statements of Cash Flows - Cash Flow Information (Detail) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplemental Cash Flow Information [Line Items]
Interest Paid, Net of Capitalized Interest	$ 70,726	$ 83,504	$ 100,375
Capitalized Interest	3,611	1,997	437
Income Taxes (Refunded) Paid	5,433	(295)	1,876
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Dividend Payable	10,289	452
Exchange Of Limited Partnership Units For General Partnership Units [Abstract]
Conversion of Units to Common Stock	0	0	0
Property Transfer to Lender in Satisfaction of Non-Recourse Mortgage Loan
Net Investment in Real Estate	0	0	(3,200)
Prepaid Expenses and Other Assets, Net	0	0	(1,987)
Mortgage Loan Payable, Net	0	0	5,040
Loss from Retirement of Debt	0	0	(147)
Mortgage Loan Payable Assumed in Conjunction with a Property Acquisition	483	12,026	24,417
Notes Receivable Issued in Conjunction with Certain Property Sales	12,520	0	7,029
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate	15,249	12,524	6,517
Write-off of Fully Depreciated Assets	(62,281)	(46,801)	(58,357)
Noncontrolling Interest
Exchange Of Limited Partnership Units For General Partnership Units [Abstract]
Conversion of Units to Common Stock	(996)	(4,763)	(1,109)
Common Stock
Exchange Of Limited Partnership Units For General Partnership Units [Abstract]
Conversion of Units to Common Stock	1	5	1
Additional Paid-in Capital
Exchange Of Limited Partnership Units For General Partnership Units [Abstract]
Conversion of Units to Common Stock	995	4,758	1,108
Common Stock and Operating Partnership Units [Member]
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Dividend Payable	9,837	0	0
Preferred Stock
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Dividend Payable	$ 452	$ 452	$ 4,763