Equity (Tables)

12 Months Ended

Dec. 31, 2013

Equity

Schedule of Limited Partners' Preferred Interests in the Operating Partnership and Other Noncontrolling Redeemable Interests in Properties

	2013		2012
7.50% Cumulative Redeemable Preferred Units, 260,000 units authorized, 255,373 issued and outstanding	$	25,537	$	25,537
Other noncontrolling redeemable interests in properties		164,948		152,469
Limited partners' preferred interest in the Operating Partnership and other noncontrolling redeemable interests in properties	$	190,485	$	178,006

Schedule of LTIP units earned and aggregate grant date fair values adjusted for estimated forfeitures

LTIP Program	LTIP Units Earned	Grant Date Fair Value
2010 LTIP Program
1-year 2010 LTIP Program	133,673	1-year program — $7.2 million
2-year 2010 LTIP Program	337,006	2-year program — $14.8 million
3-year 2010 LTIP Program	489,654	3-year program — $23.0 million
2011-2013 LTIP Program	469,848	$35.0 million
2012-2014 LTIP Program	To be determined in 2015	$35.0 million
2013-2015 LTIP Program	To be determined in 2016	$33.5 million

Schedule of restricted stock awards

	For the Year Ended December 31,
	2013		2012		2011
Shares of restricted stock awarded during the year, net of forfeitures		107,123		114,066		116,885
Weighted average fair value of shares granted during the year	$	160.20	$	146.70	$	110.12
Amortization expense	$	18,311	$	14,001	$	14,018