Equity (Tables)

12 Months Ended

Dec. 31, 2015

Equity

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	401,203	$35.0 million
2013-2015 LTIP program	To be determined in 2016	$29.5 million
2014-2016 LTIP program	To be determined in 2017	$30.0 million
2015-2017 LTIP program	To be determined in 2018	$29.9 million

Schedule of restricted stock awards

Future minimum lease payments due under these leases for years ending December 31, excluding applicable extension options and any sublease income, are as follows:

	For the Year Ended December 31,
	2015		2014		2013
Shares of restricted stock awarded during the year, net of forfeitures		63,738		83,509		107,123
Weighted average fair value of shares granted during the year	$	197.17	$	166.36	$	160.22
Amortization expense	$	13,692	$	18,256	$	18,311