Acquisitions (Details) (USD $)			0 Months Ended		0 Months Ended								1 Months Ended							0 Months Ended			0 Months Ended
	Sep. 30, 2013 Property sqft	Dec. 31, 2012	Apr. 26, 2013 Lincoln Place Story sqft	Jan. 17, 2013 Tower Place 200 sqft	Mar. 07, 2013 Deerwood Portfolio sqft Property	Mar. 25, 2013 Tampa Fund II Assets sqft Property	Jun. 03, 2013 US Airways Building Property	Sep. 04, 2013 Thomas Properties Group, Inc	Apr. 26, 2013 Office Building Lincoln Place sqft	Apr. 26, 2013 Retail Site Lincoln Place sqft	Aug. 28, 2013 Land acre	Aug. 19, 2013 Land acre	Aug. 22, 2013 Chief Executive Officer Land	Aug. 22, 2013 Investor Land	Aug. 19, 2013 Henry F. Pratt III Land	Sep. 04, 2013 Houston, TX Thomas Properties Group, Inc Property	Sep. 04, 2013 Austin, Texas Thomas Properties Group, Inc Property	Sep. 04, 2013 Brandywine Realty Trust Commerce Square Philadelphia, PA Property	Sep. 04, 2013 Brandywine Realty Trust Four Points Centre Austin, Texas	Jun. 03, 2013 PKY W. Rio Salado, LLC US Airways Building sqft	Sep. 30, 2013 PKY W. Rio Salado, LLC US Airways Building sqft	Jun. 03, 2013 PKY W. Rio Salado, LLC US Airways Building	Sep. 11, 2013 7000 Central Park JV LLC 7000 Central Park sqft	Sep. 30, 2013 7000 Central Park JV LLC 7000 Central Park sqft	Sep. 16, 2013 7000 Central Park JV LLC 7000 Central Park	Sep. 30, 2013 Limited Partner 7000 Central Park JV LLC 7000 Central Park	Sep. 11, 2013 Limited Partner 7000 Central Park JV LLC 7000 Central Park	Sep. 30, 2013 Preferred Partner 7000 Central Park JV LLC 7000 Central Park
Business Acquisition [Line Items]
Area of real estate property (in square feet)	640,000		140,000	258,000	1,000,000	788,000			111,000	29,000	1	6								225,000	225,000		415,000	415,000
Cost of entity acquired				$ 56,300,000	$ 130,000,000	$ 97,500,000														$ 41,800,000
Number of real estate properties	42				2	4										2	5
Mortgage secured for properties in a business acquisition					84,500,000															3,500,000
Maturity date			Jun. 11, 2016		Apr. 01, 2023															Dec. 01, 2016
Interest rate on mortgage (in percent)			5.90%		3.90%															3.00%
Company purchased its co-investor's interest						70.00%																75.00%					40.00%
Mortgage assumed in a business acquisition						40,700,000
Mortgage loan on property in business combination						58,100,000
Number of stories in a property acquired							9
Expiration date of lease																				Apr. 01, 2024
Leased percentage of a property acquisition (in percent)			100.00%																	100.00%
First termination option																				Dec. 31, 2016
Second termination option																				Dec. 31, 2021
Months notice of termination																				0 years 12 months 0 days
Ownership by noncontrolling owners (in percent)						70.00%														25.00%
Number of stories in parking garage			5
Liabilities assumed in a business acquisition			49,600,000
Operating partnership units issued			900,000
closing stock price			$ 18.06
Implied purchase price			65,900,000
Acquisition purchase price								1,200,000,000			1,200,000	2,900,000
Business combination, equity interest issued													11,966	29,916	5,983
Shares of newly issued common stock in exchange for each share of TPGI								0.3822
Number of properties Held for Sale																		2
Disposal selling price																		332,000,000	51,000,000
Face amount of mortgage note																											65,000,000
Total purchase price																							56,600,000
Transaction costs related to acquisition of equity interest																							318,000
Total initial invesment																								45,000,000
Parkway's share of preferred equity investment																					42,200,000			44,900,000		8,000,000		37,000,000
Ownership percentage in equity investments (in percent)																					74.58%			40.00%
Mortgage notes payable	$ 722,313,000	$ 605,889,000
Property occupied percentage	83.90%																				100.00%				75.20%