Acquisitions of Real Estate Assets (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended		9 Months Ended			9 Months Ended		7 Months Ended		3 Months Ended		2 Months Ended
	Dec. 31, 2011 ENCLAVE PARKWAY 1200 [Member] sqft	Mar. 30, 2011 ENCLAVE PARKWAY 1200 [Member] building	Dec. 31, 2011 W MONROE 500 [Member] sqft building	Mar. 31, 2011 W MONROE 500 [Member] building		Dec. 31, 2011 THE DUPREE [Member] sqft	Apr. 29, 2011 THE DUPREE [Member] building	Dec. 31, 2011 THE MEDICI [Member] sqft building	Jun. 07, 2011 THE MEDICI [Member] building	Dec. 31, 2011 The 225 and 235 Presidential Way Buildings sqft building	Sep. 13, 2011 The 225 and 235 Presidential Way Buildings building	Dec. 31, 2011 TOWNPARK 400 [Member] sqft building	Nov. 10, 2011 TOWNPARK 400 [Member] building
Business Acquisition [Line Items]
Number of Buildings		1		1			1		1		2		1
Rentable Square Feet	149,654		962,361			137,818		152,221		440,130		175,674
Percentage Occupied as of Acquisition Date		18.00%		67.00%			83.00%		22.00%		100.00%		19.00%
Purchase Price		$ 18.5		$ 227.5	[1]		$ 20.5		$ 13.2		$ 85.3		$ 23.9

[1] Piedmont acquired the 500 W. Monroe building located in downtown Chicago, Illinois through a foreclosure sale related to certain notes receivable previously held by Piedmont (see Note 6 for a more complete description of this transaction). No additional purchase consideration was required to acquire the 500 W. Monroe building interests.