Common Stock, Redemption of Partnership Units, Ratio

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Disposal Group, Including Discontinued Operation, Transaction Costs

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Stockholders' Equity Note, Spinoff Transaction, Conversion Ratio

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Number of shares of equity interests issued or issuable to acquire entity.

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-Name Accounting Standards Codification
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

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The number of units or percentage investment held by one or more members or limited partners of the LLC or LP.

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The cash outflow associated with the investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group.

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Transactions With Parkway Properties, Inc. (Textual) (Details) $ / shares in Units, $ in Thousands, shares in Millions					1 Months Ended	12 Months Ended
	Oct. 07, 2016 USD ($) Rate	Oct. 06, 2016 USD ($) shares	Oct. 06, 2016 USD ($) Rate	Oct. 06, 2016 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)	Oct. 05, 2016 $ / shares
Business Acquisition [Line Items]
Stock conversion ratio \| Rate	12.50%
Percentage of partnership units owned by the Company			98.00%	98.00%
Payment to acquire outside partner's interest in the joint venture					$ 279,000
Revenue contributed from the merger						$ 68,700
Net income contributed from the merger						9,000
Spin-off
Business Acquisition [Line Items]
Transaction costs included in discontinued operations	$ 6,300
Outside Unit Holders
Business Acquisition [Line Items]
Percentage of partnership units owned by legacy outside unit holders \| Rate			2.00%
Limited Partner
Business Acquisition [Line Items]
Redemption of partnership units in shares of common stock, ratio				1
CPLP
Business Acquisition [Line Items]
Closing stock price (in usd per share) \| $ / shares							$ 10.19
Fair value of assets and liabilities assumed		$ 1,950,008	$ 1,950,008	$ 1,950,008
Acquisition and merger costs						$ 24,500
Parkway
Business Acquisition [Line Items]
Stock conversion ratio \| Rate			163.00%
Parkway \| Common Stock
Business Acquisition [Line Items]
Number of shares issued in merger \| shares		183
Parkway \| Preferred Stock
Business Acquisition [Line Items]
Number of shares issued in merger \| shares		7