Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010		Dec. 31, 2009
Revenues:
Rental income	$ 419,141	$ 408,375		$ 409,905
Tenant reimbursements	115,879	114,795		126,872
Property management fee revenue	1,584	3,212		3,111
Other rental income	5,038	6,658		2,764
Total revenues	541,642	533,040		542,652
Expenses:
Property operating costs	208,711	196,875		207,018
Depreciation	104,818	97,275		97,467
Amortization	54,903	38,021		46,359
Impairment losses on real estate assets	0	0	[1]	35,063
General and administrative	24,838	28,388		26,656
Operating Expenses	393,270	360,559		412,563
Real estate operating income	148,372	172,481		130,089
Other income (expense):
Interest expense	(65,817)	(66,486)		(71,464)
Interest and other income	2,774	3,486		4,407
Equity in income of unconsolidated joint ventures	1,619	2,633		104
Gain on consolidation of variable interest entity	1,532	0		0
Gain on extinguishment of debt	1,039	0		0
Nonoperating Income (Expense)	(58,853)	(60,367)		(66,953)
Income from continuing operations	89,519	112,114		63,136
Discontinued operations:
Operating income, excluding impairment loss	12,880	18,684		11,579
Impairment loss	0	(9,587)		0
Gain/(loss) on sale of real estate assets	122,657	(817)		0
Income from discontinued operations	135,537	8,280		11,579
Net income	225,056	120,394		74,715
Less: Net income attributable to noncontrolling interest	(15)	(15)		(15)
Net income attributable to Piedmont	$ 225,041	$ 120,379		$ 74,700
Per share information – basic:
Income from continuing operations	$ 0.52	$ 0.66		$ 0.40
Income from discontinued operations	$ 0.78	$ 0.05		$ 0.07
Income attributable to noncontrolling interest	$ 0.00	$ 0.00		$ 0.00
Net income available to common stockholders	$ 1.30	$ 0.71		$ 0.47
Per share information – diluted:
Income from continuing operations	$ 0.52	$ 0.65		$ 0.40
Income from discontinued operations	$ 0.78	$ 0.05		$ 0.07
Income attributable to noncontrolling interest	$ 0.00	$ 0.00		$ 0.00
Net income available to common stockholders	$ 1.30	$ 0.70		$ 0.47
Weighted-average common shares outstanding - basic (in shares)	172,764,838	170,752,520		158,419,262
Weighted-average common shares outstanding - diluted (in shares)	172,980,947	170,967,324		158,580,990

[1] During the year ended December 31, 2010, Piedmont recorded an impairment charge of approximately $9.6 million on the 111 Sylvan Avenue building as a component of discontinued operations. See Note 17 below for further detail.