Share-Based and Long-Term Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of share-based compensation activity

	Restricted Shares				Deferred Incentive Share Units				Stock Options				RSUs				LTIP Units
	# of Shares		Weighted Average Grant-Date Fair Value		# of Share Units		Weighted Average Grant-Date Fair Value		# of Options		Weighted Average Grant-Date Fair Value		# of Stock Units		Weighted Average Grant-Date Fair Value		# of LTIP Units	Weighted Average Grant-Date Fair Value
Balance at 12/31/14	13,769		$	14.61	6,855		$	16.63	1,293,750		$	4.17	504,534		$	16.03	300,636	$	9.26
Granted	—		—		—		—		—		—		267,596		13.50		147,302	7.18
Vested	(8,580	)	15.20		(6,130	)	17.08		(431,250	)	4.17		(145,854	)	18.45		—	—
Forfeited	—		—		(725	)	12.89		—		—		(24,001	)	10.96		—	—
Balance at 12/31/15	5,189		$	13.65	—		$	—	862,500		$	4.17	602,275		$	14.52	447,938	$	8.58

Summary of weighted-average assumptions used to estimate fair values of options granted

The following table presents the weighted-average assumptions used to estimate the fair values of the options granted in the periods presented:

	Year Ended
	December 31,
	2015	2014	2013
Risk-free interest rate	—	—	1.01%
Expected volatility	—	—	31.0%
Expected life (in years)	—	—	6
Dividend Yield	—	—	4%
Weighted-average estimated fair value of options granted during the year	—	—	$4.17