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

12 Months Ended

Dec. 31, 2012

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

Schedule of market condition goals

The time-based awards will vest ratably over four years from the date the shares are granted.  The market condition awards are contingent on the Company meeting goals for compounded annual total return to stockholders ("TRTS") over the three year period beginning July 1, 2010.  The market condition goals are based upon (i) the Company's absolute compounded annual TRS; and (ii) the Company's absolute compounded annual TRTS relative to the compounded annual return of the MSCI US REIT ("RMS") Index calculated on a gross basis, as follows:

	Threshold	Target	Maximum
Absolute Return Goal	10%	12%	14%
Relative Return Goal	RMS + 100 bps	RMS + 200 bps	RMS + 300 bps

Summary of restricted shares and deferred incentive share unit activity

A summary of the Company's restricted stock and deferred incentive share unit activity is as follows:

	Restricted Shares		Weighted Average Price		Deferred Incentive Share Units		Weighted Average Price
Outstanding at December 31, 2009	308,975		$	29.94	18,055		$	34.08
Issued	345,120		7.30		3,805		14.83
Vested	(152,941	)	33.06		(4,355	)	47.78
Forfeited	(21,224	)	26.69		(1,865	)	32.99
Outstanding at December 31, 2010	479,930		12.81		15,640		25.71
Issued	235,168		10.31		20,435		23.97
Vested	(99,202	)	23.99		(4,930	)	45.11
Forfeited	(161,826	)	10.68		(3,775	)	20.38
Outstanding at December 31, 2011	454,070		9.83		27,370		21.65
Issued	21,900		10.15		—		—
Vested	(56,013	)	21.55		(3,030	)	14.93
Forfeited	(138,724	)	8.18		(6,580	)	14.06
Outstanding at December 31, 2012	281,233		$	8.34	17,760		$	25.61

Vesting Scheduled of Restricted Stock and DISUs [Table Text Block]

Restricted shares and deferred incentive share units vest in the following years, subject to service and market conditions:

	Time Based Awards	Market Condition Awards (1)	Total Restricted Shares	Deferred Incentive Share Units
2013	14,052	117,014	131,066	—
2014	14,048	117,017	131,065	1,490
2015	11,781	—	11,781	16,270
2016	7,321	—	7,321	—
	47,202	234,031	281,233	17,760

(1) The market condition restricted shares will vest in the years noted above subject to achievement of the market condition goals described.

Summary of stock option activity

A summary of the Company's stock option activity and related information is as follows:

	1994 Stock Option Plan				1991 Directors Stock Option Plan			2001 Directors Stock Option Plan
	Shares		Weighted Average Price		Shares	Weighted Average Price		Shares		Weighted Average Price
Outstanding at December 31, 2009	86,280		$	31.46	—	$	—	12,500		$	41.63
Forfeited	(56,319	)	30.28		—	—		(3,000	)	38.95
Outstanding at December 31, 2010	29,961		33.69		—	—		9,500		42.47
Forfeited	(27,508	)	33.51		—	—		(6,500	)	44.10
Outstanding at December 31, 2011	2,453		35.70		—	—		3,000		38.95
Forfeited	(2,453	)	35.70		—	—		(3,000	)	38.95
Vested and Exercisable at  December 31, 2012	—		$	—	—	$	—	—		$	—