Cousins Properties (CUZ) 10-K 6 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Jan. 31, 2019	Jun. 30, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	COUSINS PROPERTIES INC
Entity Central Index Key	25,232
Document Type	10-K
Document Ending Period Date	Dec. 31, 2018
Amendment Flag	false
Document Fiscal Year Focus	2,018
Document Fiscal Year Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Public Float			$ 3,996,942,489
Entity Common Stock, Shares Outstanding		420,366,403

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Real estate assets:
Operating properties, net of accumulated depreciation of $421,495 and $275,977 in 2018 and 2017, respectively	$ 3,603,011	$ 3,332,619
Projects under development	24,217	280,982
Land	72,563	4,221
Total properties	3,699,791	3,617,822
Cash and cash equivalents	2,547	148,929
Restricted cash	148	56,816
Notes and accounts receivable, net of allowance for doubtful accounts of $629 and $535 in 2018 and 2017, respectively	13,821	14,420
Deferred rents receivable	83,116	58,158
Investment in unconsolidated joint ventures	161,907	101,414
Intangible assets, net	145,883	186,206
Other assets	39,083	20,854
Total assets	4,146,296	4,204,619
Total assets
Notes payable	1,062,570	1,093,228
Accounts payable and accrued expenses	110,159	137,909
Deferred income	41,266	37,383
Intangible liabilities, net of accumulated amortization of $42,473 and $28,960 in 2018 and 2017, respectively	56,941	70,454
Other liabilities	54,204	40,534
Total liabilities	1,325,140	1,379,508
Commitments and contingencies
Stockholders' investment:
Preferred stock, $1 par value, 20,000,000 shares authorized, 6,867,357 shares issued and outstanding in 2018 and 2017	6,867	6,867
Common stock, $1 par value, 700,000,000 shares authorized, 430,724,520 and 430,349,620 shares issued in 2018 and 2017, respectively	430,725	430,350
Additional paid-in capital	3,606,191	3,604,776
Treasury stock at cost, 10,339,735 and 10,329,082 shares in 2018 and 2017, respectively	(148,473)	(148,373)
Distributions in excess of cumulative net income	(1,129,445)	(1,121,647)
Distributions in excess of cumulative net income	2,765,865	2,771,973
Total stockholders' investment	55,291	53,138
Distributions in excess of cumulative net income	2,821,156	2,825,111
Total equity	$ 4,146,296	$ 4,204,619

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Operating properties, accumulated depreciation	$ 421,495	$ 275,977
Notes and accounts receivable, allowance for doubtful accounts	629	535
Intangible liabilities, accumulated amortization	$ 42,473	$ 28,960
Preferred stock, par value (in usd per share)	$ 1	$ 1
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	6,867,357	6,867,357
Preferred stock, shares outstanding	6,867,357	6,867,357
Common stock, par value (in usd per share)	$ 1	$ 1
Common stock, shares authorized	700,000,000	700,000,000
Common stock, shares issued	430,724,520	430,349,620
Treasury stock, shares	10,339,735	10,329,082

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues:
Total rental property revenues	$ 475,212	$ 466,185	$ 259,211
Expenses:
Rental property operating expenses	164,678	163,882	96,908
Reimbursed expenses	3,782	3,527	3,259
General and administrative expenses	22,040	27,523	25,592
Interest expense	39,430	33,524	26,650
Depreciation and amortization	181,382	196,745	97,948
Acquisition and transaction costs	248	1,661	24,521
Other	556	1,796	5,888
Total costs and expenses	412,116	428,658	280,766
Gain (loss) on extinguishment of debt	8	2,258	(5,180)
Income (loss) from continuing operations before unconsolidated joint ventures and gain on sale of investment properties	63,104	39,785	(26,735)
Income from unconsolidated joint ventures	12,224	47,115	10,562
Income (loss) from continuing operations before gain on sale of investment properties	75,328	86,900	(16,173)
Gain on sale of investment properties	5,437	133,059	77,114
Income from continuing operations	80,765	219,959	60,941
Income from discontinued operations	0	0	19,163
Net income	80,765	219,959	80,104
Net income attributable to noncontrolling interests	(1,601)	(3,684)	(995)
Net income available to common stockholders	$ 79,164	$ 216,275	$ 79,109
Per common share information — basic and diluted:
Income from continuing operations (in usd per share)	$ 0.19	$ 0.52	$ 0.24
Income from discontinued operations (in usd per share)	0	0	0.07
Net income per common share - basic and diluted (in usd per share)	$ 0.19	$ 0.52	$ 0.31
Weighted average shares — basic (in shares)	420,305	415,610	253,895
Weighted average shares — diluted (in shares)	427,473	423,297	256,023
Dividends declared per common share (in usd per share)	$ 0.26	$ 0.3	$ 0.24
Rental property revenues
Revenues:
Total rental property revenues	$ 461,853	$ 446,035	$ 249,814
Fee income
Revenues:
Total rental property revenues	10,089	8,632	8,347
Other
Revenues:
Total rental property revenues	$ 3,270	$ 11,518	$ 1,050

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Treasury Stock	Distributions in Excess of Cumulative Net Income	Stockholders’ Investment	Nonredeemable Noncontrolling Interests
Beginning balance at Dec. 31, 2015	$ 1,683,415	$ 0	$ 220,256	$ 1,722,224	$ (134,630)	$ (124,435)	$ 1,683,415	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	80,104					79,109	79,109	995
Securities issued in merger	1,950,008	6,867	183,207	1,683,076			1,873,150	76,858
Noncontrolling interest in assets acquired in merger	292,337							292,337
Common stock issuance pursuant to stock based compensation	504		280	224			504
Spin-off of New Parkway	(1,141,061)					(1,118,240)	(1,118,240)	(22,821)
Amortization of stock options and restricted stock, net of forfeitures	1,648		(35)	1,683			1,648
Common stock redemption by unit holders	0		39	223			262	(262)
Contributions from nonredeemable noncontrolling interests	4,126							4,126
Distributions to nonredeemable noncontrolling interests	(292,550)							(292,550)
Repurchase of common stock	(13,743)				(13,743)		(13,743)
Common dividends	(50,548)					(50,548)	(50,548)
Ending balance at Dec. 31, 2016	2,514,240	6,867	403,747	3,407,430	(148,373)	(1,214,114)	2,455,557	58,683
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	219,959						216,275	3,684
Common stock offering, net of issuance costs	211,774		25,000	186,774			211,774
Common stock issuance pursuant to stock based compensation	124		403	(279)			124
Spin-off of New Parkway	545					545	545
Amortization of stock options and restricted stock, net of forfeitures	1,983		(3)	1,986			1,983
Common stock redemption by unit holders	0		1,203	8,865			10,068	(10,068)
Contributions from nonredeemable noncontrolling interests	2,646							2,646
Distributions to nonredeemable noncontrolling interests	(1,807)							(1,807)
Common dividends	(124,353)					(124,353)	(124,353)
Ending balance at Dec. 31, 2017	2,825,111	6,867	430,350	3,604,776	(148,373)	(1,121,647)	2,771,973	53,138
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of change in accounting principle	22,329					22,329	22,329
Net income	80,765					79,164	79,164	1,601
Common stock issuance pursuant to stock based compensation	(567)		397	(864)	(100)		(567)
Amortization of stock options and restricted stock, net of forfeitures	2,257		(22)	2,279			2,257
Contributions from nonredeemable noncontrolling interests	3,205							3,205
Distributions to nonredeemable noncontrolling interests	(2,653)							(2,653)
Common dividends	(109,291)					(109,291)	(109,291)
Ending balance at Dec. 31, 2018	$ 2,821,156	$ 6,867	$ 430,725	$ 3,606,191	$ (148,473)	$ (1,129,445)	$ 2,765,865	$ 55,291

Consolidated Statements of Eq_2

Consolidated Statements of Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Common dividends per share (in usd per share)	$ 0.26	$ 0.30	$ 0.24

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 80,765	$ 219,959	$ 80,104
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of investment properties	(5,437)	(133,059)	(77,114)
Depreciation and amortization, including discontinued operations	181,382	196,745	145,293
Amortization of deferred financing costs and premium/discount on notes payable	2,417	(2,139)	(1,595)
Stock-based compensation expense, net of forfeitures	3,399	2,994	2,152
Effect of non-cash adjustments to rental revenues	(32,401)	(40,410)	(25,873)
Income from unconsolidated joint ventures	(12,224)	(47,115)	(10,562)
(Gain) loss on extinguishment of debt	16,756	11,065	14,184
(Gain) loss on extinguishment of debt	(8)	(2,258)	5,180
Other	0	0	4,526
Changes in other operating assets and liabilities:
Change in other receivables and other assets, net	(6,049)	11,456	2,156
Change in operating liabilities, net	434	(5,589)	(20,749)
Net cash provided by operating activities	229,034	211,649	117,702
Proceeds from investment property sales
Proceeds from investment property sales	372	370,944	622,643
Proceeds from sale of interest in unconsolidated joint venture	0	12,514	0
Property acquisition, development, and tenant asset expenditures	(223,636)	(319,975)	(193,534)
Investment in unconsolidated joint ventures	0	(13,382)	0
Investment in unconsolidated joint ventures	(50,933)	(20,080)	(28,531)
Cash and restricted cash acquired in merger with Parkway Properties, Inc.	0	0	93,753
Distributions from unconsolidated joint ventures	2,032	75,506	949
Investment in marketable securities	0	0	(21,190)
Change in notes receivable and other assets	(8,317)	6,583	(8,241)
Other	(4,002)	0	0
Net cash provided by (used in) investing activities	(284,484)	112,110	465,849
Proceeds from credit facility
Proceeds from credit facility	8,000	589,300	716,800
Repayment of credit facility	(8,000)	(723,300)	(674,800)
Proceeds from issuance of notes payable	0	350,000	870,000
Repayment of notes payable	(31,402)	(495,913)	(907,300)
Payment of deferred financing costs	(6,166)	(2,074)	0
Cash distributed to Parkway, Inc.	0	0	(192,755)
Repurchase of Common Stock	0	0	(13,743)
Common stock issued, net of expenses	0	211,521	0
Contributions from noncontrolling interests	1,497	2,646	4,126
Distributions to nonredeemable noncontrolling interests	(2,653)	(1,807)	(286,122)
Common dividends paid	(107,167)	(99,151)	(50,548)
Other	(1,709)	(557)	(4,195)
Net cash used in financing activities	(147,600)	(169,335)	(538,537)
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT BEGINNING OF PERIOD	(203,050)	154,424	45,014
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT BEGINNING OF PERIOD	205,745	51,321	6,307
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT END OF PERIOD	$ 2,695	$ 205,745	$ 51,321

Description of Business and Bas

Description of Business and Basis of Presentation	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION	DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION Description of Business: Cousins Properties Incorporated (“Cousins”), a Georgia corporation, is a self-administered and self-managed real estate investment trust (“REIT”). Cousins conducts substantially all of its business through Cousins Properties, LP ("CPLP"). Cousins owns approximately 98% of CPLP and consolidates CPLP. CPLP owns Cousins TRS Services LLC ("CTRS") a taxable entity which owns and manages its own real estate portfolio and performs certain real estate related services for other parties. Cousins, CPLP, CTRS, and their subsidiaries (collectively, the “Company”) develop, acquire, lease, manage, and own primarily Class A office properties and opportunistic mixed-use developments in the Sunbelt markets of the United States with a focus on Georgia, Texas, Arizona, Florida, and North Carolina. As of December 31, 2018 , the Company’s portfolio of real estate assets consisted of interests in 15.0 million square feet of office space and 310,000 square feet of mixed-use space. Basis of Presentation: The consolidated financial statements include the accounts of the Company and its consolidated partnerships and wholly-owned subsidiaries. Intercompany transactions and balances have been eliminated in consolidation. The Company presents its financial statements in accordance with accounting principles generally accepted in the United States (“GAAP”) as outlined in the Financial Accounting Standard Board’s Accounting Standards Codification (the “Codification” or “ASC”). The Codification is the single source of authoritative accounting principles applied by nongovernmental entities in the preparation of financial statements in conformity with GAAP. For the three years ended December 31, 2018 , there were no items of other comprehensive income. Therefore, the Company did not present comprehensive income. The Company evaluates all partnerships, joint ventures, and other arrangements with variable interests to determine if the entity or arrangement qualifies as a variable interest entity (“VIE”), as defined in the Codification. If the entity or arrangement qualifies as a VIE and the Company is determined to be the primary beneficiary, the Company is required to consolidate the assets, liabilities, and results of operations of the VIE. As of December 31, 2018 the Company did not have any partnerships, joint ventures, or other arrangements with variable interests that qualified as a VIE. Recently Issued Accounting Standards : On January 1, 2018, the Company adopted ASU 2014-09 ("ASC 606"), "Revenue from Contracts with Customers" using the “modified retrospective” method; as such, the Company applied the guidance only to the most recent period presented in the financial statements. Under the new guidance, companies are required to recognize revenue when the seller satisfies a performance obligation, which would be when the buyer takes control of the good or service. Prior to adoption of ASC 606, gains or losses from real estate sales were adjusted at the time of the sale by the maximum exposure to loss related to continuing involvement with the real estate asset. After adoption, any continuing involvement is considered a separate performance obligation and the sales price is required to be allocated between the elements with continuing involvement and those without continuing involvement. As the continuing performance obligations are satisfied, additional gains or losses are recognized. The Company had no sales of real estate with continuing involvement during 2018 or in any prior periods that affected results of operations in 2018 or could affect results of operations in future periods. The Company categorizes its primary sources of revenue into revenue from contracts with customers and other revenue accounted for as leases under Accounting Standards Codification Topic 840 - Leases ("ASC 840") as follows: • Rental property revenue consists of (1) contractual revenues from leases recognized on a straight-line basis over the term of the respective lease; (2) percentage rents recognized once a specified sales target is achieved; (3) parking revenue; and (4) the reimbursement of the tenants' share of real estate taxes, insurance, and other operating expenses. Rental property revenue is accounted for in accordance with the guidance set forth in ASC 840. • Fee revenue consists of development fees, management fees, and leasing fees earned from unconsolidated joint ventures and from third parties. Fee revenue is accounted for in accordance with the guidance set forth in ASC 606. • Other revenue consists primarily of termination fees, which are accounted for in accordance with the guidance set forth in ASC 840. Fee revenue and other revenue, as a whole, are immaterial to total revenues. The Company made no changes to previously reported amounts related to the adoption of ASC 606. For the years ended December 31, 2018 , 2017 , and 2016 the Company recognized rental property revenue of $461.9 million , $446.0 million , and $249.8 million , respectively. For the years ended December 31, 2018 , 2017 , and 2016 the Company recognized fee and other revenue of $13.4 million , $20.2 million , and $9.4 million , respectively. In February 2016, the FASB issued ASU 2016-02, "Leases," ("ASC 842") which amends the existing standards for lease accounting by requiring lessees to record most leases on their balance sheets and making targeted changes to lessor accounting and reporting. The new standard will require lessees to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months and classify such leases as either finance or operating leases based on the principle of whether the lease is effectively a financed purchase of the leased asset by the lessee. This classification will determine whether the lease expense is recognized based on an effective interest method (finance leases) or on a straight-line basis over the term of the lease (operating leases). Leases with a term of 12 months or less will be accounted for similarly to existing guidance for operating leases. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance. In July 2018, the FASB amended the new leasing standard, providing lessors with a practical expedient to not separately classify and disclose non-lease components of revenue from the related lease components under certain conditions. The new standard also revises the treatment of indirect leasing costs and permits the capitalization and amortization of direct leasing costs only. In 2018, the Company capitalized $3.8 million of indirect leasing costs. Because the Company expects substantially all of its leases with tenants to qualify for the practical expedient, the Company's accounting and reporting for leases as lessor is not expected to change materially. For those leases where the Company is lessee, specifically ground leases, the adoption of ASC 842 will require the Company to record a right of use asset and a lease liability on the consolidated balance sheet. Ground leases executed before the adoption of ASC 842 will continue to be accounted for as operating leases and will not result in a materially different ground lease expense. However, ground leases executed after the adoption of ASC 842 are expected to be accounted for as finance leases which will result in ground lease expense being recorded using the effective interest method instead of the straight-line method over the term of the lease, which would result in higher ground lease expense in the earlier years of a ground lease when compared to the straight line method. The Company expects to use the "modified retrospective" method upon adoption of ASC 842 on January 1, 2019, which permits application of the new standard on the adoption date as opposed to the earliest comparative period presented in its financial statements. The Company expects to record a right of use asset and a lease liability in the amount of approximately $40 million upon the adoption of ASC 842. In February 2017, the FASB issued ASU No. 2017-05, “Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets” (“ASU 2017-05”). ASU 2017-05 updates the definition of an “in substance nonfinancial asset” and clarifies the derecognition guidance for nonfinancial assets to conform with the new revenue recognition standard. Among other things, ASU 2017-05 requires companies to recognize 100% of the gain on the transfer of a nonfinancial asset to an entity in which it has a noncontrolling interest. ASU 2017-05 is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. The Company adopted this guidance using the "modified retrospective" method effective on January 1, 2018. As a result of the adoption of ASU 2017-05, the Company recorded a cumulative effect from change in accounting principle which credited distributions in excess of cumulative net income by $22.3 million . This cumulative effect adjustment resulted from the 2013 transfer of a wholly-owned property to an entity in which it had a noncontrolling interest. In May 2017, FASB issued ASU 2017-09, "Scope of Modification Accounting," which amends the scope of modification accounting for share-based payment arrangements and provides guidance on the types of changes to the terms or conditions of share-based payment awards to which an entity would be required to apply modification accounting under ASC 718, "Compensation—Stock Compensation." This update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017, with early adoption permitted. The Company adopted this standard on January 1, 2018. Adoption of the standard did not have a material impact on the Company's financial statements.

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
SIGNIFICANT ACCOUNTING POLICIES	SIGNIFICANT ACCOUNTING POLICIES Real Estate Assets Cost Capitalization: Costs related to planning, developing, leasing, and constructing a property, including costs of development personnel working directly on projects under development, are capitalized. In addition, the Company capitalizes interest to qualifying assets under development based on average accumulated expenditures outstanding during the period. In capitalizing interest to qualifying assets, the Company first uses the interest incurred on specific project debt, if any, and next uses the Company’s weighted average interest rate for non-project specific debt. The Company also capitalizes interest to investments accounted for under the equity method when the investee has property under development with a carrying value in excess of the investee’s borrowings. To the extent debt exists within an unconsolidated joint venture during the construction period, the venture capitalizes interest on that venture-specific debt. The Company capitalizes interest, real estate taxes, and certain operating expenses on the unoccupied portion of recently completed development properties from the date a project is substantially complete to the earlier of (1) the date on which the project achieves 90% economic occupancy or (2) one year after it is substantially complete. Through December 31, 2018, the Company capitalized direct and indirect leasing costs related to leases that are probable of being executed. These costs included commissions paid to outside brokers, legal costs incurred to negotiate and document a lease agreement, and internal costs that are based on time spent by leasing personnel on successful leases. The Company allocated these costs to individual tenant leases and amortized them over the related lease term. Beginning January 1, 2019, in connection with the implementation of ASC 842, the Company will only capitalize direct costs of a lease, which would not have been incurred if the lease had not been obtained. These costs generally would include commissions paid to employees or third parties and any other costs incremental to executing a lease that would not have otherwise been incurred. Impairment: For real estate assets that are considered to be held for sale according to accounting guidance or those that are distributed to stockholders in a spin-off, the Company records impairment losses if the fair value of the asset or disposal group net of estimated selling costs is less than the carrying amount. For those long-lived assets that are held and used according to accounting guidance, management reviews each asset for the existence of any indicators of impairment. If indicators of impairment are present, the Company calculates the expected undiscounted future cash flows to be derived from such assets. If the undiscounted cash flows are less than the carrying amount of the asset, the Company reduces the asset to its fair value and records an impairment loss. Acquisition of Real Estate Assets: The Company records the acquired tangible and intangible assets and assumed liabilities of operating property acquisitions at fair value at the acquisition date. The acquired assets and assumed liabilities for an operating property acquisition generally include but are not limited to: land, buildings and improvements, and identified tangible and intangible assets and liabilities associated with in-place leases, including leasing costs, value of above-market and below-market tenant leases, value of above-market and below-market ground leases, acquired in-place lease values, and tenant relationships, if any. The fair value of land is derived from comparable sales of land within the same submarket and/or region. The fair value of buildings and improvements, tenant improvements, and leasing costs are based upon current market replacement costs and other relevant market rate information. The fair value of the above-market or below-market component of an acquired lease is based upon the present value (calculated using a market discount rate) of the difference between (i) the contractual rents to be paid pursuant to the lease over its remaining term and (ii) management’s estimate of the rents that would be paid using fair market rental rates and rent escalations at the date of acquisition over the remaining term of the lease. The amounts recorded for above-market and below-market ground leases are included in intangible liabilities and intangible assets, respectively, and are amortized on a straight-line basis into rental property revenues over the remaining terms of the applicable leases. The fair value of acquired in-place leases is derived based on management’s assessment of lost revenue and costs incurred for the period required to lease the “assumed vacant” property to the occupancy level when purchased. The amount recorded for acquired in-place leases is included in intangible assets and amortized as an increase to depreciation and amortization expense over the remaining term of the applicable leases. Depreciation and Amortization: Real estate assets are stated at depreciated cost less impairment losses, if any. Buildings are depreciated over their estimated useful lives, which range generally from 30 to 42 years. The life of a particular building depends upon a number of factors including whether the building was developed or acquired and the condition of the building upon acquisition. Furniture, fixtures and equipment are depreciated over their estimated useful lives of three to five years. Tenant improvements, leasing costs and leasehold improvements are amortized over the term of the applicable leases or the estimated useful life of the assets, whichever is shorter. The Company accelerates the depreciation of tenant assets if it estimates that the lease term will end prior to the termination date. This acceleration may occur if a tenant files for bankruptcy, vacates its premises or defaults in another manner on its lease. Deferred expenses are amortized over the period of estimated benefit. The Company uses the straight-line method for all depreciation and amortization. Discontinued Operations: Assets held for sale or disposals representing strategic shifts in operations are reflected in discontinued operations. During 2016, the Company completed a spin-off as described in note 3. The Company considered this disposition to be a strategic shift in operations and reclassified the historical operations of the assets included in the spin-off into discontinued operations on the consolidated statements of operations. During 2017 and 2018, there were no assets held for sale or disposals that represented a strategic shift in operations. The Company ceases depreciation of a property when it is categorized as held for sale. Investment in Joint Ventures For joint ventures that the Company does not control, but over which it exercises significant influence, the Company uses the equity method of accounting. The Company's judgment with regard to its level of influence or control of an entity involves consideration of various factors including the form of its ownership interest; its representation in the entity's governance; its ability to participate in policy-making decisions; and the rights of other investors to participate in the decision-making process, to replace the Company as manager, and/or to liquidate the venture. These ventures are recorded at cost and adjusted for equity in earnings (losses) and cash contributions and distributions. Any difference between the carrying amount of these investments on the Company’s balance sheet and the underlying equity in net assets on the joint venture’s balance sheet is adjusted as the related underlying assets are depreciated, amortized, or sold. The Company generally allocates income and loss from an unconsolidated joint venture based on the venture's distribution priorities, which may be different from its stated ownership percentage. The Company evaluates the recoverability of its investment in unconsolidated joint ventures in accordance with accounting standards for equity investments by first reviewing each investment for any indicators of impairment. If indicators are present, the Company estimates the fair value of the investment. If the carrying value of the investment is greater than the estimated fair value, management makes an assessment of whether the impairment is “temporary” or “other-than-temporary.” In making this assessment, management considers the following: (1) the length of time and the extent to which fair value has been less than cost, (2) the financial condition and near-term prospects of the entity, and (3) the Company’s intent and ability to retain its interest long enough for a recovery in market value. If management concludes that the impairment is "other than temporary," the Company reduces the investment to its estimated fair value. Noncontrolling Interest The Company consolidates CPLP and certain joint ventures in which it owns a controlling interest. In cases where the entity’s documents do not contain a required redemption clause, the Company records the partner’s share of the entity in the equity section of the balance sheets in nonredeemable noncontrolling interests. In cases where the entity’s documents contain a provision requiring the Company to purchase the partner’s share of the venture at a certain value upon demand or at a future date, the Company records the partner’s share of the entity in redeemable noncontrolling interests on the balance sheets. The outside partners' interests in CPLP are redeemable into shares of cash or common stock of the Company at the Company's sole discretion. Therefore, noncontrolling interests associated with CPLP are considered nonredeemable noncontrolling interests. The noncontrolling partners' share of all consolidated entities' income is reflected in net income attributable to noncontrolling interest on the statements of operations. Revenue Recognition Rental Property Revenues: The Company recognizes contractual revenues from leases on a straight-line basis over the term of the respective lease. Certain of these leases also provide for percentage rents based upon the level of sales achieved by the lessee. Percentage rents are recognized once the specified sales target is achieved. In addition, leases typically provide for reimbursement of the tenants' share of real estate taxes, insurance, and other operating expenses to the Company. Operating expense reimbursements are recognized as the related expenses are incurred. During 2018 , 2017 , and 2016 , the Company recognized $79.8 million , $67.2 million , and $90.2 million , respectively, in revenues, including discontinued operations, from tenants related to operating expenses. The Company makes valuation adjustments to all tenant-related accounts receivable based upon its estimate of the likelihood of collectibility of amounts due from the tenant. The amount of any valuation adjustment is based on the tenant’s credit and business risk, history of payment, and other factors considered by management. Fee Income: The Company recognizes development, management, and leasing fees as it satisfies the related performance obligations under the respective contracts. The Company recognizes development and leasing fees received from unconsolidated joint ventures and related salaries and other direct costs incurred by the Company as income and expense based on the percentage of the joint venture which the Company does not own. Correspondingly, the Company adjusts its investment in unconsolidated joint ventures when fees are paid to the Company by a joint venture in which the Company has an ownership interest. Gain on Sale of Investment Properties : Prior to the adoption of ASC 606, the Company recognized gains or losses on sale of investment property when the sale of a property was consummated, the buyer’s initial and continuing investment was adequate to demonstrate commitment to pay, any receivable obtained was not subject to future subordination, the usual risks and rewards of ownership were transferred, and the Company had no substantial continuing involvement with the property. If the Company had a commitment to the buyer and that commitment was a specific dollar amount, this commitment was accrued and the gain on sale that the Company recognized was reduced. If the Company had a construction commitment to the buyer, management made an estimate of this commitment, deferred a portion of the profit from the sale, and recognized the deferred profit when the commitment was fulfilled. After adoption of ASC 606, the Company recognizes a gain on the sale of investment property at the time the buyer obtains control of the investment property. If the Company maintains any continuing involvement with the investment property, that continuing involvement is considered to be one or more additional performance obligations and additional gains on losses will be recognized as these performance obligations are satisfied. Income Taxes Cousins has elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). To qualify as a REIT, Cousins must distribute annually at least 90% of its adjusted taxable income, as defined in the Code, to its stockholders and satisfy certain other organizational and operating requirements. It is management’s current intention to adhere to these requirements and maintain Cousins’ REIT status. As a REIT, Cousins generally will not be subject to federal income tax at the corporate level on the taxable income it distributes to its stockholders. If Cousins fails to qualify as a REIT in any taxable year, it will be subject to federal income taxes at regular corporate rates and may not be able to qualify as a REIT for four subsequent taxable years. Cousins may be subject to certain state and local taxes on its income and property, and to federal income taxes on its undistributed taxable income. CTRS is a C-Corporation for federal income tax purposes and uses the liability method for accounting for income taxes. Tax return positions are recognized in the financial statements when they are “more-likely-than-not” to be sustained upon examination by the taxing authority. Deferred income tax assets and liabilities result from temporary differences. Temporary differences are differences between the tax bases of assets and liabilities and their reported amounts in the financial statements that will result in taxable or deductible amounts in future periods. A valuation allowance may be placed on deferred income tax assets, if it is determined that it is more likely than not that a deferred tax asset may not be realized. Earnings per Share (“EPS”) Net income per share-basic is calculated as net income available to common stockholders divided by the weighted average number of common shares outstanding during the period, including nonvested restricted stock which has nonforfeitable dividend rights. Net income per share-diluted is calculated as net income available to common stockholders plus noncontrolling interests in CPLP divided by the diluted weighted average number of common shares outstanding during the period. Diluted weighted average number of common shares uses the same weighted average share number as in the basic calculation and adds the potential dilution that would occur if the outside units in CPLP were converted into the Company's common stock and stock options (or any other contracts to issue common stock) were exercised and resulted in additional common shares outstanding, calculated using the treasury stock method. Stock options are dilutive when the average market price of the Company’s stock during the period exceeds the option exercise price. Cash and Cash Equivalents Cash and cash equivalents include unrestricted cash and highly-liquid money market instruments. Highly-liquid money market instruments include securities and repurchase agreements with original maturities of three months or less , money market mutual funds, and United States Treasury Bills with maturities of 30 days or less . Restricted Cash Restricted Cash includes escrow accounts held by lenders to pay real estate taxes, earnest money paid in connection with future acquisitions, and proceeds from property sales held by qualified intermediaries for potential like-kind exchanges in accordance with Section 1031 of the Code, if any. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Transactions With Parkway Prope

Transactions With Parkway Properties, Inc.	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
TRANSACTIONS WITH PARKWAY PROPERTIES, INC.	TRANSACTIONS WITH PARKWAY PROPERTIES, INC. On October 6, 2016, Parkway Properties, Inc. ("Parkway") merged with and into a wholly-owned subsidiary of the Company (the "Merger"), with this subsidiary continuing as the surviving corporation of the Merger. The Company incurred $188,000 , $1.7 million , and $24.5 million in expenses related to the Merger during the years ended December 31, 2018, 2017, and 2016, respectively . The Merger accounted for $68.7 million of consolidated revenue and $9.0 million in consolidated net income as reported for 2016. On October 7, 2016, Cousins distributed pro rata to its common and limited voting preferred stockholders, including legacy Parkway common and limited voting stockholders, all of the outstanding shares of common and limited voting stock, respectively, of Parkway, Inc. ("New Parkway"), a newly-formed entity that included the combined businesses relating to the ownership of real properties in Houston, Texas and certain other businesses of Parkway (the "Spin-Off"). New Parkway became an independent public company. The following unaudited supplemental pro forma information presented for the year ended December 31, 2016, is based upon the Company's historical consolidated statements of operations, adjusted as if the Merger had occurred on January 1, 2015. This supplemental pro forma information is not necessarily indicative of future results, or of actual results, that would have been achieved had the transactions been consummated at the beginning of the period (unaudited, in thousands, except per share amounts). Revenues $ 732,117 Income from continuing operations 179,625 Net income 174,117 Net income available to common stockholders 166,375 Per share information: Basic $ 0.42 Diluted $ 0.41 As a result of the Spin-Off, the historical results of operations of the Company's properties that were contributed to New Parkway have been presented as discontinued operations in the consolidated statements of operations and comprehensive income. The above pro forma information is presented prior to the discontinued operations reclassification. Discontinued operations include transaction costs of $6.3 million incurred in 2016 as a result of the Spin-Off. The following table includes a summary of discontinued operations of the Company for the year ended December 31, 2016 (in thousands). Rental property revenues $ 136,927 Rental property operating expenses (58,336 ) Other revenues 288 Interest expense (6,022 ) Depreciation and amortization (47,345 ) Other expenses (6,349 ) Income from discontinued operations $ 19,163 Cash provided by operating activities $ 42,604 Cash used in investing activities $ 30,067

Real Estate Transactions

Real Estate Transactions	12 Months Ended
	Dec. 31, 2018
Real Estate [Abstract]
REAL ESTATE TRANSACTIONS	REAL ESTATE TRANSACTIONS Dispositions The Company had no dispositions in 2018 . The Company sold the following properties in 2017 and 2016 ($ in thousands): Property Property Type Location Square Feet Sales Price 2017 American Cancer Society Center Office Atlanta, GA 996,000 $ 166,000 Bank of America Center, One Orlando Centre, -- and Citrus Center Office Orlando, FL 1,038,000 $ 208,100 2016 Post Oak Central Office Houston, TX 1,280,000 (1 ) Greenway Plaza Office Houston, TX 4,348,000 (1 ) 191 Peachtree Office Atlanta, GA 1,225,000 $ 267,500 Two Liberty Place Office Philadelphia, PA 941,000 $ 219,000 Lincoln Place Office Miami, FL 140,000 $ 80,000 The Forum Office Atlanta, GA 220,000 $ 70,000 100 North Point Center East Office Atlanta, GA 129,000 $ 22,000 (1) Properties distributed to New Parkway in the Spin-Off. The Company sold the properties noted above as part of its ongoing investment strategy of exiting non-core markets and selling non-core assets, using these proceeds to fund new investment activity. Acquisitions During 2018, the Company acquired interests in two tracts of land in Midtown Atlanta, Georgia and one tract of land in Tempe, Arizona for future investment. These three tracts of land were valued at $68.4 million and are included in land on the accompanying balance sheets.

Notes and Accounts Receivable

Notes and Accounts Receivable	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
NOTES AND ACCOUNTS RECEIVABLE	NOTES AND ACCOUNTS RECEIVABLE At December 31, 2018 and 2017 , notes and accounts receivables included the following (in thousands): 2018 2017 Notes receivable $ 453 $ 465 Tenant and other receivables 13,997 14,490 Allowance for doubtful accounts related to tenant and other receivables (629 ) (535 ) $ 13,821 $ 14,420 At December 31, 2018 and 2017 , the fair value of the Company’s notes receivable approximated the cost basis. Fair value was calculated by discounting future cash flows from the notes receivable at estimated rates in which similar loans would have been made at December 31, 2018 and 2017 . The estimate of the rate, which is the most significant input in the discounted cash flow calculation, is intended to replicate notes of similar type and maturity. This fair value calculation is considered to be Level 3 under the guidelines as set forth in ASC 820, as the Company utilizes internally generated assumptions regarding current interest rates at which similar instruments would be executed.

Investment in Unconsolidated Jo

Investment in Unconsolidated Joint Ventures	12 Months Ended
	Dec. 31, 2018
Equity Method Investments and Joint Ventures [Abstract]
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES	INVESTMENT IN UNCONSOLIDATED JOINT VENTURES The following information summarizes financial data and principal activities of the Company’s unconsolidated joint ventures. The information included in the following table entitled summary of financial position is as of December 31, 2018 and 2017 . The information included in the summary of operations table is for the years ended December 31, 2018 , 2017 , and 2016 (in thousands). Total Assets Total Debt Total Equity (Deficit) Company's Investment SUMMARY OF FINANCIAL POSITION 2018 2017 2018 2017 2018 2017 2018 2017 Terminus Office Holdings $ 258,060 $ 261,999 $ 198,732 $ 203,131 $ 50,539 $ 48,033 $ 48,571 $ 24,898 DC Charlotte Plaza LLLP 155,530 53,791 — — 88,922 42,853 46,554 22,293 Austin 300 Colorado Project, LP 51,180 — — — 41,298 — 22,335 — Carolina Square Holdings LP 106,187 106,580 74,638 64,412 28,844 33,648 16,840 19,384 HICO Victory Center LP 15,069 14,403 — — 14,801 14,401 10,003 9,752 Charlotte Gateway Village, LLC 112,553 124,691 — — 109,666 121,386 8,225 14,568 AMCO 120 WT Holdings, LLC 36,680 18,066 — — 31,372 16,354 5,538 1,664 CL Realty, L.L.C. 4,169 8,287 — — 4,183 8,127 2,886 2,980 Temco Associates, LLC 1,482 4,441 — — 1,379 4,337 919 875 EP II LLC 247 277 — — 165 180 30 44 EP I LLC 461 521 — — 296 319 6 25 Wildwood Associates 11,157 16,337 — — 11,108 16,297 (460 ) (1) (1,151 ) (1) Crawford Long - CPI, LLC 26,429 27,362 69,522 71,047 (44,146 ) (44,815 ) (21,071 ) (1) (21,323 ) (1) Other — 6,379 — — — 6,303 — 4,931 $ 779,204 $ 643,134 $ 342,892 $ 338,590 $ 338,427 $ 267,423 $ 140,376 $ 78,940 Total Revenues Net Income (Loss) Company's Share of Net Income (Loss) SUMMARY OF OPERATIONS 2018 2017 2016 2018 2017 2016 2018 2017 2016 Charlotte Gateway Village, LLC $ 26,932 $ 26,465 $ 34,156 $ 10,285 $ 9,528 $ 14,536 $ 5,143 $ 4,764 $ 2,194 Terminus Office Holdings 44,429 43,959 42,386 5,506 6,307 4,608 2,755 3,153 2,303 Wildwood Associates — — — (1,140 ) (116 ) (140 ) 2,723 (58 ) (70 ) Crawford Long - CPI, LLC 12,383 12,079 12,113 3,446 3,171 2,743 1,641 1,572 1,372 HICO Victory Center LP 400 429 383 400 431 376 219 225 187 Austin 300 Colorado Project, LP 487 — — 220 — — 110 — — Temco Associates, LLC 176 192 1,343 (2,965 ) 123 440 43 46 502 Courvoisier Centre JV, LLC — 15,106 3,968 — (1,750 ) (489 ) 5 521 (93 ) DC Charlotte Plaza LLLP — 2 47 — 2 45 (1 ) 1 24 EP II LLC 5 2,644 5,376 (16 ) 13,008 (1,187 ) (14 ) 9,756 (878 ) EP I LLC 17 4,123 12,239 (23 ) 45,115 2,294 (20 ) 28,667 1,684 CL Realty, L.L.C. — 2,964 567 (161 ) 2,668 237 (94 ) 536 128 Carolina Square Holdings LP 10,686 2,701 58 (169 ) (532 ) 9 (275 ) 522 — AMCO 120 WT Holdings, LLC — — — 38 58 — — — — Other — — 4,219 (69 ) (69 ) 3,926 (11 ) (2,590 ) 3,209 $ 95,515 $ 110,664 $ 116,855 $ 15,352 $ 77,944 $ 27,398 $ 12,224 $ 47,115 $ 10,562 (1) Negative balances are included in deferred income on the consolidated balance sheets. Terminus Office Holdings LLC ("TOH") – TOH is a 50 - 50 joint venture between the Company and institutional investors advised by J.P. Morgan Asset Management ("JPM"), which owns and operates two office buildings in Atlanta, Georgia. TOH has two non-recourse mortgage loans totaling $198.7 million that mature on January 1, 2023 . The weighted average interest rate on these fixed rate loans is 4.68% . Operating cash flows and proceeds from capital transactions of TOH are allocated to the partners equally until JPM receives an agreed upon return, after which the Company may receive an additional promoted interest. The assets of the venture in the above table include a cash balance of $7.5 million at December 31, 2018 . DC Charlotte Plaza LLLP ("Charlotte Plaza") – Charlotte Plaza is a 50 - 50 joint venture between the Company and Dimensional Fund Advisors ("DFA"), formed to develop DFA's 282,000 square foot regional headquarters building in Charlotte, North Carolina. Capital contributions and distributions of cash flow are made equally in accordance with each partner's partnership interest. The Company's required capital contribution is limited to a maximum of $46 million . The assets of the venture in the above table include a cash balance of $842,000 at December 31, 2018 . Austin 300 Colorado Project, LP ("300 Colorado") – In 2018, 300 Colorado, a joint venture between the Company, 3C Block 28 Partners, LP ("3CB"), and 3C RR Xylem, LP ("3CRR"), was formed for the purpose of developing a 358,000 square foot office building in Austin, Texas. The Company owns a 50% interest in the venture, 3CB owns a 34.5% interest, and 3CRR owns a 15.5% interest. Upon formation, 3CB and 3CRR contributed land for use by the joint venture in the development project, the Company contributed $6.0 million in cash, and 300 Colorado assumed a ground lease for an additional parcel of land. The assets of the venture in the above table include a cash balance of $1.7 million at December 31, 2018 . Carolina Square Holdings LP ("Carolina Square") – Carolina Square is a 50 - 50 joint venture between the Company and NR 123 Franklin LLC ("Northwood Ravin"), which owns and operates a mixed-use property in Chapel Hill, North Carolina. This property contains 158,000 square feet of office space, 44,000 square feet of retail space, and 246 apartment units. Carolina Square has a construction loan, secured by the project, with an outstanding balance of $74.6 million. The loan bears interest at LIBOR plus 1.90% and matures on May 1, 2019, with the second of two one -year extensions available, subject to conditions. The Company and Northwood Ravin each guarantee 12.5% of the outstanding loan amount and guarantee completion of the project. The assets of the venture in the table above include a cash balance of $3.8 million at December 31, 2018. HICO Victory Center LP ("HICO") – HICO is a joint venture between the Company and Hines Victory Center Associates Limited Partnership ("Hines Victory"), formed for the purpose of acquiring and subsequently developing an office parcel in Dallas, Texas. Pursuant to the joint venture agreement, all pre-development expenditures, other than land, are funded equally by the partners. The Company funded 75% of the cost of land while Hines Victory funded 25% . If the partners decide to commence construction of an office building, the capital accounts and economics of the venture will be adjusted such that the Company will own at least 90% of the venture and Hines will own up to 10% . As of December 31, 2018 , the Company accounted for its investment in HICO under the equity method because it does not control the activities of the venture. If the partners decide to construct an office building within the venture, the Company expects to consolidate the venture. The assets of the venture in the table above include a cash balance of $565,000 at December 31, 2018 . Charlotte Gateway Village, LLC ("Gateway") – Gateway is a 50 - 50 joint venture between the Company and Bank of America Corporation (“BOA”), which owns and operates Gateway Village, a 1.1 million square foot office building in Charlotte, North Carolina. Through December 1, 2016, Gateway’s net income or loss and cash distributions were allocated to the members as follows: first to the Company so that it received a cumulative compounded return equal to 11.46% on its capital contributions, second to BOA until it received an amount equal to the aggregate amount distributed to the Company, and then 50% to each member. After December 1, 2016, net income and cash flows are allocated 50% to each until the Company receives a 17% internal rate of return; thereafter, cash flows are allocated 80% to BOA and 20% to the Company. The assets of the venture in the above table include a cash balance of $3.2 million at December 31, 2018 . CL Realty, L.L.C. ("CL Realty") – CL Realty is a 50 - 50 joint venture between the Company and Forestar Realty Inc. ("Forestar"), that owns a parcel of land in Texas. The assets of the venture in the above table include a cash balance of $379,000 at December 31, 2018 . AMCO 120 WT Holdings, LLC ("Cousins AMCO") – Cousins AMCO is a joint venture between the Company, with a 20% interest, and affiliates of AMLI Residential (“AMLI”), with an 80% interest, formed to develop 120 West Trinity, a mixed-use property in Decatur, Georgia. The property is expected to contain approximately 33,000 square feet of office space, 19,000 square feet of retail space, and 330 apartment units. Initial contributions to the joint venture for the purchase of land were funded entirely by AMLI. Subsequent contributions are funded in proportion to the members' percentage interests. The Company accounts for its investment in this joint venture under the equity method as it does not control the activities of the venture. The assets of the venture in the above table include a cash balance of $1,000 at December 31, 2018 . Temco Associates, LLC ("Temco") – Temco is a 50 - 50 joint venture between the Company and Forestar, that owns a golf course in Georgia. The assets of the venture in the above table include a cash balance of $500,000 at December 31, 2018 . EP I LLC ("EP I") and EP II LLC ("EP II") – EP I and EP II are joint ventures between the Company, with a 75% ownership interest, and Lion Gables Realty Limited Partnership (“Gables”), with a 25% ownership interest, which owned Emory Point, a mixed-use property in Atlanta, Georgia. In 2017, EP I and EP II sold Emory Point for a combined gross sales price of $199.0 million . After repayment of debt, the Company received a distribution of $70.0 million and recognized a gain of $37.9 million , which is recorded in income from unconsolidated joint ventures. The assets of the ventures in the above table include a cash balance of $695,000 at December 31, 2018 . Courvoisier Centre JV, LLC ("Courvoisier") – Courvoisier was a joint venture between the Company, with a 20% interest, and Spanish Key LLC, with an 80% interest, that owned Courvoisier Centre, a 343,000 square foot, two-building office property in Miami, Florida. In 2017, the Company sold its 20% interest in Courvoisier Centre for $12.6 million and recognized a gain of $716,000 in a transaction that valued its interest in the property at $33.9 million , prior to deduction for existing mortgage debt. Wildwood Associates ("Wildwood") – Wildwood is a 50 - 50 joint venture between the Company and IBM which owns undeveloped land in the Wildwood Office Park in Atlanta, Georgia. At December 31, 2018 , the Company’s investment in Wildwood was a credit balance of $460,000 . This credit balance resulted from cumulative distributions from Wildwood over time that exceeded the Company’s basis in its contributions, and essentially represents deferred gain not recognized at venture formation. This credit balance will decline as the venture’s remaining land is sold. During 2018, the venture sold land resulting in the Company decreasing the credit balance by $749,000 and recognizing income from unconsolidated joint ventures of $2.3 million related to this sale. The Company does not have any obligation to fund Wildwood’s working capital needs. The assets of the venture in the above table include a cash balance of $68,000 at December 31, 2018 . Crawford Long—CPI, LLC ("Crawford Long" ) – Crawford Long is a 50 - 50 joint venture between the Company and Emory University that owns the Emory University Hospital Midtown Medical Office Tower, a 358,000 square foot medical office building located in Atlanta, Georgia. Crawford Long has a $69.5 million , 3.5% fixed rate mortgage note which matures on June 1, 2023 . The assets of the venture in the above table include a cash balance of $2.1 million at December 31, 2018 . At December 31, 2018 , the Company's unconsolidated joint ventures had aggregate outstanding indebtedness to third parties of $342.9 million . These loans are mortgage or construction loans, most of which are non-recourse to the Company, except as described above. In addition, in certain instances, the Company provides “non-recourse carve-out guarantees” on these non-recourse loans. The Company recognized $9.3 million , $7.2 million , and $7.4 million of development, leasing, and management fees, including salary and expense reimbursements, from unconsolidated joint ventures in 2018 , 2017 , and 2016 , respectively.

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
INTANGIBLE ASSETS	INTANGIBLE ASSETS At December 31, 2018 and 2017 , intangible assets included the following (in thousands): 2018 2017 In-place leases, net of accumulated amortization of $125,130 and $91,548 in 2018 and 2017, respectively $ 105,964 $ 139,548 Above-market tenant leases, net of accumulated amortization of $19,502 and $13,038 in 2018 and 2017, respectively 20,453 26,917 Below-market ground lease, net of accumulated amortization of $621 and $345 in 2018 and 2017, respectively 17,792 18,067 Goodwill 1,674 1,674 $ 145,883 $ 186,206 Aggregate net amortization expense related to intangible assets and liabilities was $27.0 million , $42.4 million , and $24.0 million for the years ended December 31, 2018 , 2017 , and 2016 , respectively. Over the next five years and thereafter, aggregate amortization of these intangible assets and liabilities is anticipated to be as follows (in thousands): Below Market Above Market Below Market Ground Lease Above Market In Place Leases Total 2019 $ (11,645 ) $ (46 ) $ 276 $ 5,308 $ 26,161 $ 20,054 2020 (10,519 ) (46 ) 276 4,433 21,230 15,374 2021 (8,753 ) (46 ) 276 3,374 16,366 11,217 2022 (6,185 ) (46 ) 276 2,292 11,309 7,646 2023 (4,844 ) (46 ) 276 1,710 8,843 5,939 Thereafter (13,272 ) (1,488 ) 16,412 3,336 22,055 27,043 $ (55,218 ) $ (1,718 ) $ 17,792 $ 20,453 $ 105,964 $ 87,273 Weighted average remaining lease term 6 years 37 years 65 years 6 years 6 years 10 years The carrying amount of goodwill did not change during the years ended December 31, 2018 and 2017 .

Other Assets

Other Assets	12 Months Ended
	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
OTHER ASSETS	OTHER ASSETS At December 31, 2018 and 2017 , other assets included the following (in thousands): 2018 2017 Furniture, fixtures and equipment, leasehold improvements, and other deferred costs, net of accumulated depreciation of $25,193 and $21,925 in 2018 and 2017, respectively $ 14,942 $ 12,241 Prepaid expenses and other assets 5,087 3,902 Lease inducements, net of accumulated amortization of $1,545 and $978 in 2018 and 2017, respectively 4,961 3,126 Line of credit deferred financing costs, net of accumulated amortization of $1,451 and $3,119 in 2018 and 2017, respectively 5,844 1,213 Predevelopment costs and earnest money 8,249 372 $ 39,083 $ 20,854 Lease inducements are incentives paid to tenants in conjunction with leasing space, such as moving costs, sublease arrangements of prior space and other costs. These amounts are amortized into rental revenues over the individual underlying lease terms. Predevelopment costs represent amounts that are capitalized related to predevelopment projects that the Company determined are probable of future development.

Notes Payable

Notes Payable	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
NOTES PAYABLE	NOTES PAYABLE The following table summarizes the terms of notes payable outstanding at December 31, 2018 and 2017 (in thousands): Description Interest Rate Maturity * 2018 2017 Term Loan, unsecured 3.70% 2021 $ 250,000 $ 250,000 Senior Notes, unsecured 3.91% 2025 250,000 250,000 Fifth Third Center 3.37% 2026 143,497 146,557 Colorado Tower 3.45% 2026 119,427 120,000 Senior Notes, unsecured 4.09% 2027 100,000 100,000 Promenade 4.27% 2022 99,238 102,355 816 Congress 3.75% 2024 81,676 83,304 Meridian Mark Plaza 6.00% 2020 23,524 24,038 Credit Facility, unsecured 3.55% 2023 — — The Pointe 4.01% 2019 — 22,510 $ 1,067,362 $ 1,098,764 Unamortized premium, net — 219 Unamortized loan costs (4,792 ) (5,755 ) Total Notes Payable $ 1,062,570 $ 1,093,228 *Weighted average maturity of notes payable outstanding at December 31, 2018 was 5.7 years. Credit Facility Through January 2, 2018, the Company had a $500 million senior unsecured line of credit (the "Credit Facility") that was scheduled to mature on May 28, 2019 . The Credit Facility contained financial covenants that required, among other things, the maintenance of an unencumbered interest coverage ratio of at least 2.00 ; a fixed charge coverage ratio of at least 1.50 ; an overall leverage ratio of no more than 60% ; and a minimum shareholders' equity in an amount equal to $1.0 billion , plus a portion of the net cash proceeds from certain equity issuances. The Credit Facility also contained customary representations and warranties and affirmative and negative covenants, as well as customary events of default. The interest rate applicable to the Credit Facility varied according to the Company’s leverage ratio, and was, at the election of the Company, determined based on either (1) the current London Interbank Offered Rate (" LIBOR ") plus a spread of between 1.10% and 1.45% , based on leverage or (2) the greater of Bank of America's prime rate , the federal funds rate plus 0.50% or the one-month LIBOR plus 1.0% (the “Base Rate”), plus a spread of between 0.10% and 0.45% , based on leverage. The Company also paid an annual facility fee on the total commitments under the Credit Facility of between 0.15% and 0.30% , based on leverage. On January 3, 2018, the Company entered into a Fourth Amended and Restated Credit Agreement (the "New Credit Facility") under which the Company may borrow up to $1 billion if certain conditions are satisfied. The New Credit Facility recasts the Credit Facility by, among other things, increasing the size from $500 million to $1 billion ; extending the maturity date from May 28, 2019 to January 3, 2023; providing for the expansion of the New Facility by an additional $500 million , subject to receipt of additional commitments from lenders and other customary conditions; and decreasing the Consolidated Unencumbered Interest Coverage ratio from 2.0 to 1.75 . The interest rate applicable to the New Credit Facility varies according to the Company's leverage ratio, and may, at the election of the Company, be determined based on either (1) the current LIBOR plus a spread of between 1.05% and 1.45% , or (2) the greater of Bank of America's prime rate, the federal funds rate plus 0.50% , or the one-month LIBOR plus 1.0% (the "Base Rate"), plus a spread of between 0.10% or 0.45% , based on leverage. At December 31, 2018 , the New Credit Facility's spread over LIBOR was 1.05% . At December 31, 2018 , the Company had no amounts drawn under the New Credit Facility and had the ability to borrow $998 million of the $1 billion available, with $2 million utilized by an outstanding letter of credit. Term Loan The Company has a $250 million unsecured term loan (the "Term Loan") that matures on December 2, 2021. Through January 21, 2018, the Term Loan contained financial covenants substantially consistent with those of the Credit Facility. On January 22, 2018, the Term Loan was amended to make the financial covenants consistent with those of the New Credit Facility. The interest rate applicable to the Term Loan varies according to the Company’s leverage ratio, and may, at the election of the Company, be determined based on either (1) the current LIBOR plus a spread of between 1.20% and 1.70% , based on leverage or (2) the greater of Bank of America's prime rate , the federal funds rate plus 0.50% or the one-month LIBOR plus 1.0% (the “Base Rate”), plus a spread of between 0.00% and 0.75% , based on leverage. At December 31, 2018 , the Term Loan's spread over LIBOR was 1.2% . Unsecured Senior Notes In 2017, the Company closed a $350 million private placement of senior unsecured notes, which were funded in two tranches. The first tranche of $100 million has a 10 -year maturity and has a fixed annual interest rate of 4.09% . The second tranche of $250 million has an 8 -year maturity and has a fixed annual interest rate of 3.91% . The senior unsecured notes contain financial covenants that require, among other things, the maintenance of an unencumbered interest coverage ratio of at least 2.00 ; a fixed charge coverage ratio of at least 1.50 ; an overall leverage ratio of no more than 60% ; and a minimum shareholders' equity in an amount equal to $1.9 billion , plus a portion of the net cash proceeds from certain equity issuances. The senior notes also contain customary representations and warranties and affirmative and negative covenants, as well as customary events of default. Mortgage Loan Information In 2018, the Company repaid in full, without penalty, the $22.2 million The Pointe mortgage note. In 2017, the Company repaid in full, without penalty, the $128.0 million One Eleven Congress mortgage note, the $101.0 million San Jacinto Center mortgage note, the $52.0 million Two Buckhead Plaza mortgage note, and the $77.9 million 3344 Peachtree mortgage note. In connection with these repayments, the Company recorded gains on extinguishment of debt of $2.6 million , which represented the unamortized premium recorded on the notes at the time of the Merger. In 2017, the Company sold the ACS Center. A portion of the proceeds from the sale were used to repay the $127.0 million mortgage note on the associated property, and the Company recorded a loss on extinguishment of debt of $376,000 , which represented the remaining unamortized loan costs and other costs associated with repaying the debt. As of December 31, 2018 , the Company had $467.3 million outstanding on five non-recourse mortgage notes. Assets with depreciated carrying values of $505.3 million were pledged as security on these mortgage notes payable. Other Debt Information At December 31, 2018 and 2017 , the estimated fair value of the Company’s notes payable was $1.1 billion , calculated by discounting the debt's remaining contractual cash flows at estimated rates at which similar loans could have been obtained at December 31, 2018 and 2017 . The estimate of the current market rate, which is the most significant input in the discounted cash flow calculation, is intended to replicate debt of similar maturity and loan-to-value relationship. These fair value calculations are considered to be Level 2 under the guidelines as set forth in ASC 820 as the Company utilizes market rates for similar type loans from third party brokers. For the years ended December 31, 2018 , 2017 , and 2016 , interest was recorded as follows (in thousands): 2018 2017 2016 Total interest incurred $ 44,332 $ 42,767 $ 31,347 Interest capitalized (4,902 ) (9,243 ) (4,697 ) Total interest expense $ 39,430 $ 33,524 $ 26,650 Debt Maturities Future principal payments due (including scheduled amortization payments and payments due upon maturity) on the Company's notes payable at December 31, 2018 are as follows (in thousands): 2019 $ 10,997 2020 33,825 2021 261,258 2022 97,042 2023 8,274 Thereafter 655,966 $ 1,067,362

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Commitments The Company had outstanding letters of credit and performance bonds totaling $2.6 million at December 31, 2018 . As a lessor, the Company had a total of $ 100.2 million in future obligations under leases to fund tenant improvements and other future construction obligations at December 31, 2018 . The Company recorded ground and operating lease expense of $3.6 million , $3.3 million , and $2.4 million in 2018 , 2017 , and 2016 , respectively. The Company has future lease commitments under ground leases and operating leases totaling $205.6 million over weighted-average remaining terms of 76 and 2 years, respectively. Amounts due under ground and operating lease commitments are as follows (in thousands): 2019 $ 2,582 2020 2,484 2021 2,461 2022 2,396 2023 2,374 Thereafter 193,346 $ 205,643 Litigation The Company is subject to various legal proceedings, claims and administrative proceedings arising in the ordinary course of business, some of which are expected to be covered by liability insurance. Management makes assumptions and estimates concerning the likelihood and amount of any potential loss relating to these matters using the latest information available. The Company records a liability for litigation if an unfavorable outcome is probable and the amount of loss or range of loss can be reasonably estimated. If an unfavorable outcome is probable and a reasonable estimate of the loss is a range, the Company accrues the best estimate within the range. If no amount within the range is a better estimate than any other amount, the Company accrues the minimum amount within the range. If an unfavorable outcome is probable but the amount of the loss cannot be reasonably estimated, the Company discloses the nature of the litigation and indicates that an estimate of the loss or range of loss cannot be made. If an unfavorable outcome is reasonably possible and the estimated loss is material, the Company discloses the nature and estimate of the possible loss of the litigation. The Company does not disclose information with respect to litigation where an unfavorable outcome is considered to be remote or where the estimated loss would not be material. Based on current expectations, such matters, both individually and in the aggregate, are not expected to have a material adverse effect on the liquidity, results of operations, business or financial condition of the Company.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
STOCKHOLDERS' EQUITY	STOCKHOLDERS' EQUITY In 2017, the Company issued 25.0 million shares of common stock, resulting in gross proceeds to the Company of $ 212.9 million . The Company recorded $ 1.1 million in legal, accounting, and other expenses associated with the issuance resulting in net proceeds of $ 211.8 million . The Company used the net proceeds from this offering to reduce indebtedness. During the year ended December 31, 2017, certain holders of CPLP units redeemed 1,203,286 units in exchange for shares of the Company's common stock. The aggregate value at the time of these transactions was $ 10.1 million based upon the value of the Company's common stock at the time of the transactions. In 2016, in connection with the Merger, the Company issued 6.9 million shares of limited voting preferred stock, par value $1 per share. Each share of limited voting preferred stock is "paired" with a limited partnership unit in CPLP. A share of Cousins limited voting preferred stock will be automatically redeemed by Cousins without consideration if such share's paired limited partnership unit in CPLP is transferred or redeemed. Holders of the limited voting preferred stock are entitled to one vote on the following matters only: the election of directors, any proposed amendment of the Company's Articles of Incorporation, any merger or other business combination of the Company, any sale of substantially all of the Company's assets, and any liquidation of the Company. Holders of limited voting preferred stock are not entitled to any dividends or distributions and the limited voting preferred stock is not convertible into or exchangeable for any other property or securities of the Company. Ownership Limitations — In order to minimize the risk that the Company will not meet one of the requirements for qualification as a REIT, the Company's Articles of Incorporation include certain restrictions on the ownership of more than 3.9% of the Company’s total common and preferred stock, subject to waiver by the Board of Directors. Distribution of REIT Taxable Income — The following reconciles dividends paid and dividends applied in 2018 , 2017 , and 2016 to meet REIT distribution requirements (in thousands): 2018 2017 2016 Common and preferred dividends $ 107,167 $ 99,138 $ 1,077,179 Dividends treated as taxable compensation (150 ) (129 ) (92 ) Portion of dividends declared in current year, and paid in current year, which was applied to the prior year distribution requirements — — — Portion of dividends declared in subsequent year, and paid in subsequent year, which apply to current year distribution requirements — — — Dividends in excess of current year REIT distribution requirements — — (827,005 ) Dividends applied to meet current year REIT distribution requirements $ 107,017 $ 99,009 $ 250,082 Tax Status of Distributions — The following summarizes the components of the taxability of the Company’s common stock distributions for the years ended December 31, 2018 , 2017 , and 2016 : Total Ordinary Long-Term Unrecaptured Nondividend Distributions AMT Adjustment (2) 2018 $ 0.255000 $ 0.251396 $ 0.003604 $ — $ — $ — 2017 $ 0.240000 $ 0.093312 $ 0.146688 $ 0.070522 $ — $ 0.017756 2016 $ 2.853075 $ 0.079661 $ 0.582778 $ 0.100934 $ 2.190636 $ — (1) Represents a portion of the dividend allocated to long-term capital gain. (2) The Company apportioned certain 2017 alternative minimum tax adjustments to its shareholders. Individual taxpayers should refer to Internal Revenue Service Form 6251, Alternative Minimum Tax - Individuals. Corporate taxpayers should refer to Internal Revenue Service Form 4626, Alternative Minimum Tax - Corporations.

Future Minimum Rents

Future Minimum Rents	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
FUTURE MINIMUM RENTS	FUTURE MINIMUM RENTS The Company’s leases typically contain escalation provisions and provisions requiring tenants to pay a pro rata share of operating expenses. The leases typically include renewal options and are classified and accounted for as operating leases. At December 31, 2018 , future minimum rents to be received by consolidated entities under existing non-cancelable leases are as follows (in thousands): 2019 $ 328,607 2020 330,477 2021 314,410 2022 280,959 2023 256,233 Thereafter 1,115,490 $ 2,626,176

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION The Company maintains the 2009 Incentive Stock Plan (the “2009 Plan”), which allows the Company to issue awards of stock options, stock grants, or stock appreciation rights to employees and directors. As of December 31, 2018 , 2,466,153 shares were authorized to be awarded pursuant to the 2009 Plan. The Company also maintains the 2005 Restricted Stock Unit ("RSU") Plan, as amended, which allows the Company to issue awards to employees that are paid in cash on the vesting date in an amount equal to the fair market value, as defined, of one share of the Company’s stock. The Company has granted stock options, restricted stock, and restricted stock units to employees as discussed below. As a result of the Spin-Off, the number and strike price of stock options, shares of restricted stock, and the number of restricted stock units were adjusted to preserve the intrinsic value of the awards immediately prior to the Spin-Off using an adjustment ratio based on the market price of the Company's stock prior to the Spin-Off and the market price of the Company's stock subsequent to the Spin-Off pursuant to anti-dilution provisions of the 2009 Plan. Since these adjustments were considered to be a modification of the awards, the Company compared the fair value of the awards immediately prior to the Spin-Off to the fair value immediately after the Spin-Off to measure potential incremental stock-based compensation expense. The adjustments did not result in an increase in the fair value of the awards and, accordingly, the Company did not record incremental stock-based compensation expense. Stock Options At December 31, 2018 , the Company had 458,154 stock options outstanding to key employees and outside directors pursuant to the 2009 Plan, which are exercisable for common stock. The Company typically uses authorized, unissued shares to provide shares for option exercises. The stock options have a term of ten years from the date of grant and have a vesting period of four years , except director stock options, which vest immediately. In 2018 , 2017 , and 2016 , there were no stock option grants to employees or directors. In 2016, in conjunction with the Merger, the Company granted 672,375 options to former Parkway key executives that vested immediately and had a term of ten years from the date of grant. The weighted average fair value of options granted was $0.84 per option, and the Company computed the fair value of options granted using the Black-Scholes option pricing model with the following assumptions: Risk-free interest rate 1.37 % Assumed dividend yield 3.60 % Assumed lives of option awards (in years) 6.4 Assumed volatility 23.23 % The Company recorded $565,000 to additional paid-in capital for the fair value of the options granted as part of the Merger. During 2018 , 2017 , and 2016 , the Company recognized no compensation expense related to stock options. The Company does not anticipate recognizing any future compensation expense related to stock options outstanding. During 2018 , the Company issued 47,309 shares and paid $945,000 to optionees for option exercises. As of December 31, 2018 , the intrinsic value of the options outstanding and exercisable was $851,000 . The intrinsic value is calculated using the exercise prices of the options compared to the market value of the Company’s stock. At December 31, 2018 and 2017 , the weighted-average contractual lives for the options outstanding and exercisable were 1.1 years and 2.3 years, respectively. The following is a summary of stock option activity for the years ended December 31, 2018 , 2017 , and 2016 (options in thousands): Number of Options Weighted Average Exercise Price Per Option Outstanding at December 31, 2015 1,763 $ 22.05 Granted as a result of the Merger and Spin-Off 1,222 11.78 Exercised (2 ) 8.35 Forfeited/Expired (721 ) 27.24 Outstanding at December 31, 2016 2,262 10.82 Exercised (577 ) 7.51 Forfeited/Expired (756 ) 18.47 Outstanding at December 31, 2017 929 6.59 Exercised (457 ) 6.60 Forfeited/Expired (14 ) 18.72 Outstanding at December 31, 2018 458 $ 6.00 Options Exercisable at December 31, 2018 458 $ 6.00 Restricted Stock In 2018 , 2017 , and 2016 , the Company issued 315,199 , 308,289 , and 234,965 shares of restricted stock to employees, which vest ratably over three years from the issuance date. In 2018 , 2017 , and 2016 , the Company also issued 118,555 , 120,878 , and 72,771 shares of stock to independent members of the board of directors which vested immediately on the issuance date. All shares of restricted stock receive dividends and have voting rights during the vesting period. The Company records restricted stock in common stock and additional paid-in capital at fair value on the grant date, with the offsetting deferred compensation also recorded in additional paid-in capital. The Company records compensation expense over the vesting period. Compensation expense related to restricted stock was $2.3 million , $2.0 million , and $1.6 million in 2018 , 2017 , and 2016 , respectively. As of December 31, 2018 , the Company had recorded $2.8 million of unrecognized compensation cost included in additional paid-in capital related to restricted stock, which will be recognized over a weighted average period of 1.7 years. The total fair value of the restricted stock which vested during 2018 was $2.3 million . The following table summarizes restricted stock activity for the years ended December 31, 2018 , 2017 , and 2016 (shares in thousands): Number of Shares Weighted-Average Grant Date Fair Value Non-vested restricted stock at December 31, 2015 293 $ 10.65 Granted 235 8.62 Granted as a result of the Spin-Off 114 7.57 Vested (141 ) 8.54 Forfeited (30 ) 9.77 Non-vested restricted stock at December 31, 2016 471 7.57 Granted 308 8.63 Vested (214 ) 7.50 Forfeited (8 ) 6.53 Non-vested restricted stock at December 31, 2017 557 7.93 Granted 315 8.51 Vested (259 ) 7.83 Forfeited (22 ) 8.22 Non-vested restricted stock at December 31, 2018 591 $ 8.27 Restricted Stock Units During 2018 , 2017 , and 2016 , the Company awarded two types of performance-based RSUs to key employees: one based on the total stockholder return of the Company, as defined, relative to that of office peers included in the SNL US Office REIT Index (the "TSR RSUs") and the other based on the ratio of cumulative funds from operations per share to targeted cumulative funds from operations per share (the “FFO RSUs”). The performance period for these awards is three years and the ultimate payout of these awards can range from 0% to 200% of the targeted number of units depending on the achievement of the performance metrics described above. Both of these RSUs are to be settled in cash with payment dependent upon the attainment of required service, market, and performance criteria. The Company expenses an estimate of the fair value of the TSR RSUs over the performance period using a quarterly Monte Carlo valuation. The Company expenses the FFO RSUs over the vesting period using the fair market value of the Company’s stock at the reporting date multiplied by the anticipated number of units to be paid based on the current estimate of what the ratio is expected to be upon vesting. Dividend equivalents on the TSR RSUs and FFO RSUs will also be paid based upon the percentage vested. The targeted number of performance-based RSUs outstanding at December 31, 2018 are 443,127 , 379,381 , and 379,582 related to the 2018 , 2017 , and 2016 grants, respectively. The following table summarizes the performance-based RSU activity as of December 31, 2018 , 2017 , and 2016 (in thousands): Outstanding at December 31, 2015 843 Granted 312 Granted as a result of the Spin-Off 308 Vested (160 ) Forfeited (30 ) Outstanding at December 31, 2016 1,273 Granted 399 Vested (576 ) Forfeited (12 ) Outstanding at December 31, 2017 1,084 Granted 450 Vested (296 ) Forfeited (36 ) Outstanding at December 31, 2018 1,202 During 2018, 2017, and 2016, the Company granted 17,836 , 264,723 , and 28,938 time-vested RSUs, respectively, to key employees. The vesting period for these awards is three years. The value of each unit is equal to the fair market value of one share of common stock. These RSUs are to be settled in cash with payment dependent upon the attainment of the required service criteria. Dividend equivalent units will be paid based on the number of RSUs granted, with such payments made concurrently with payment of common dividends. The Company estimates future expense for all types of RSUs outstanding at December 31, 2018 to be $3.6 million (using stock prices and estimated target percentages as of December 31, 2018 ), which will be recognized over a weighted-average period of 1.1 years. During 2018 , total cash paid for all types of RSUs and related dividend payments was $3.7 million . During 2018 , 2017 , and 2016 , $4.6 million , $7.0 million , and $6.4 million , respectively, was recognized as compensation expense related to RSUs.

Retirement Savings Plan

Retirement Savings Plan	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [Abstract]
RETIREMENT SAVINGS PLAN	RETIREMENT SAVINGS PLAN The Company maintains a defined contribution plan (the “Retirement Savings Plan”) pursuant to Section 401 of the Internal Revenue Code (the “Code”) which covers active regular employees. Employees are eligible under the Retirement Savings Plan immediately upon hire, and pre-tax contributions are allowed up to the limits set by the Code. Through December 31, 2018, the Company matched up to 3% of an employee’s eligible pre-tax Retirement Savings Plan contributions up to certain Code limits. Through December 31, 2018, employees vested in Company contributions over a three -year period. Beginning January 1, 2019, the Company contributes 3% of an employee's compensation to the plan that are fully vested after the employee has been with the company for two years . The Company may change this percentage at its discretion, and, in addition, the Company could decide to make discretionary contributions in the future. The Company contributed $ 647,000 , $764,000 , and $682,000 to the Retirement Savings Plan for the 2018 , 2017 , and 2016 plan years, respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The net income tax benefit differs from the amount computed by applying the statutory federal income tax rate to CTRS' income before taxes follows ($ in thousands): 2018 2017 2016 Amount Rate Amount Rate Amount Rate Federal income tax benefit (expense) $ 143 21 % $ 47 35 % $ (1,159 ) (35 )% State income tax benefit (expense), net of federal income tax effect 27 4 % 5 4 % (132 ) (4 )% Change in deferred tax assets as a result of change in tax law — — % (340 ) (254 )% — — % Valuation allowance (174 ) (26 )% 283 211 % 1,282 39 % Other 4 1 % 5 4 % 9 — % Benefit applicable to income (loss) from continuing operations $ — — % $ — — % $ — — % The tax effect of significant temporary differences representing deferred tax assets and liabilities of CTRS as of December 31, 2018 and 2017 are as follows (in thousands): 2018 2017 Income from unconsolidated joint ventures $ 18 $ 19 Federal and state tax carryforwards 763 590 Other 2 — Total deferred tax assets 783 609 Valuation allowance (783 ) (609 ) Net deferred tax asset $ — $ — A valuation allowance is required to be recorded against deferred tax assets if, based on the available evidence, it is more likely than not that such assets will not be realized. When assessing the need for a valuation allowance, appropriate consideration should be given to all positive and negative evidence related to this realization. This evidence includes, among other things, the existence of current and recent cumulative losses, forecasts of future profitability, the length of statutory carryforward periods, the Company’s history with loss carryforwards and available tax planning strategies. As of December 31, 2018 and 2017 the deferred tax asset of CTRS equaled $783,000 and $609,000 , respectively, with a valuation allowance placed against the full amount of each. The conclusion that a valuation allowance should be recorded as of December 31, 2018 and 2017 was based on the lack of evidence that CTRS could generate future taxable income to realize the benefit of the deferred tax assets.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE The following table sets forth the computation of the basic and diluted earnings per share of the Company's consolidated statements of operations for the years ended December 31, 2018 , 2017 and 2016 (in thousands, except per share amounts): Year Ended December 31 2018 2017 2016 Earnings per common share - basic: Numerator: Income from continuing operations $ 80,765 $ 219,959 $ 60,941 Net income attributable to noncontrolling interests in CPLP from continuing operations (1,345 ) (3,681 ) (784 ) Net income attributable to other noncontrolling interests from continuing operations (256 ) (3 ) (211 ) Income from continuing operations available for common stockholders 79,164 216,275 59,946 Income from discontinued operations — — 19,163 Net income available for common stockholders $ 79,164 $ 216,275 $ 79,109 Denominator: Weighted average common shares - basic 420,305 415,610 253,895 Earnings per common share - basic: Income from continuing operations available for common stockholders $ 0.19 $ 0.52 $ 0.24 Income from discontinued operations available for common stockholders — — 0.07 Net income available for common stockholders $ 0.19 $ 0.52 $ 0.31 Earnings per common share - diluted: Numerator: Income from continuing operations $ 80,765 $ 219,959 $ 60,941 Net income attributable to other noncontrolling interests from continuing operations (256 ) (3 ) (211 ) Income from continuing operations available for common stockholders 80,509 219,956 60,730 Income from discontinued operations available for common stockholders — — 19,163 Net income available for common stockholders before net income attributable to noncontrolling interests in CPLP $ 80,509 $ 219,956 $ 79,893 Denominator: Weighted average common shares - basic 420,305 415,610 253,895 Add: Potential dilutive common shares - stock options 194 312 178 Weighted average units of CPLP convertible into common shares 6,974 7,375 1,950 Weighted average common shares - diluted 427,473 423,297 256,023 Earnings per common share - diluted: Income from continuing operations available for common stockholders $ 0.19 $ 0.52 $ 0.24 Income from discontinued operations available for common stockholders — — 0.07 Net income available for common stockholders $ 0.19 $ 0.52 $ 0.31 Anti-dilutive stock options represent stock options whose exercise price exceeds the average market value of the Company’s stock. These anti-dilutive stock options are not included in the current calculation of dilutive weighted average shares, but could be dilutive in the future. As of December 31, 2017 and 2016 , the number of anti-dilutive stock options was 24,000 and 762,000 , respectively. There were no anti-dilutive stock options outstanding as of December 31, 2018 .

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows - Supplemental Information	12 Months Ended
	Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract]
CONSOLIDATED STATEMENTS OF CASH FLOWS - SUPPLEMENTAL INFORMATION	CONSOLIDATED STATEMENTS OF CASH FLOWS - SUPPLEMENTAL INFORMATION Supplemental information related to cash flows, including significant non-cash activity affecting the consolidated statements of cash flows, for the years ended December 31, 2018 , 2017 , and 2016 is as follows (in thousands): 2018 2017 2016 Interest paid, net of amounts capitalized $ 43,166 $ 30,572 $ 32,215 Income taxes paid — — — Non-Cash Transactions: Transfer from projects under development to operating properties 325,490 58,928 — Common stock dividends declared and accrued 27,326 25,202 — Cumulative effect of change in accounting principle 22,329 — — Transfer from investment in unconsolidated joint ventures to projects under development 7,025 — 5,880 Change in accrued property acquisition, development, and tenant asset expenditures (18,104 ) 5,965 7,918 Transfer from investment in unconsolidated joint venture to operating properties — 68,498 — Non-cash assets and liabilities assumed in Merger — — 1,856,255 Non-cash assets and liabilities distributed in Spin-Off — — (948,306 ) Mortgage note payable legally defeased — — 20,170 Transfer from land held to projects under development — — 8,099 The following table provides a reconciliation of cash, cash equivalents, and restricted cash recorded on the balance sheet to cash, cash equivalents, and restricted cash in the statements of cash flows (in thousands): Year Ended December 31, 2018 2017 2016 Cash and cash equivalents $ 2,547 $ 148,929 $ 35,687 Restricted cash 148 56,816 15,634 Total cash, cash equivalents, and restricted cash $ 2,695 $ 205,745 $ 51,321

Reportable Segments

Reportable Segments	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
REPORTABLE SEGMENTS	REPORTABLE SEGMENTS The Company's segments are based on the method of internal reporting which classifies operations by property type and geographical area. The segments by property type are: Office and Mixed-Use. The segments by geographical region are: Atlanta, Charlotte, Austin, Phoenix, Tampa, Orlando, Houston, and Other. In 2016, the Company disposed of its Houston properties as part of the Spin-Off. In 2017, the Company sold its Orlando Properties. These reportable segments represent an aggregation of operating segments reported to the Chief Operating Decision Maker based on similar economic characteristics that include the type of product and the geographical location. Each segment includes both consolidated operations and the Company's share of joint venture operations. Company management evaluates the performance of its reportable segments in part based on net operating income (“NOI”). NOI represents rental property revenues less rental property operating expenses. NOI is not a measure of cash flows or operating results as measured by GAAP, is not indicative of cash available to fund cash needs and should not be considered an alternative to cash flows as a measure of liquidity. All companies may not calculate NOI in the same manner. The Company considers NOI to be an appropriate supplemental measure to net income as it helps both management and investors understand the core operations of the Company's operating assets. NOI excludes corporate general and administrative expenses, interest expense, depreciation and amortization, impairments, gains/loss on sales of real estate, and other non-operating items. Segment net income, amount of capital expenditures, and total assets are not presented in the following tables because management does not utilize these measures when analyzing its segments or when making resource allocation decisions. Information on the Company's segments along with a reconciliation of NOI to net income available to common stockholders is as follows (in thousands): Year ended December 31, 2018 Office Mixed-Use Total Net Operating Income: Atlanta $ 131,564 $ — $ 131,564 Charlotte 62,812 — 62,812 Austin 60,474 — 60,474 Phoenix 36,875 — 36,875 Tampa 30,514 — 30,514 Other 1,581 2,243 3,824 Total Net Operating Income $ 323,820 $ 2,243 $ 326,063 Year ended December 31, 2017 Office Mixed-Use Total Net Operating Income: Atlanta $ 109,706 $ 3,278 $ 112,984 Charlotte 62,708 — 62,708 Austin 58,648 — 58,648 Phoenix 34,074 — 34,074 Tampa 29,426 — 29,426 Orlando 13,029 — 13,029 Other 1,632 705 2,337 Total Net Operating Income $ 309,223 $ 3,983 $ 313,206 Year ended December 31, 2016 Office Mixed-Use Total Net Operating Income: Atlanta $ 98,032 $ 7,411 $ 105,443 Houston 78,590 — 78,590 Austin 29,865 — 29,865 Charlotte 28,418 — 28,418 Tampa 7,130 — 7,130 Phoenix 6,067 — 6,067 Orlando 3,265 — 3,265 Other 1,504 — 1,504 Total Net Operating Income $ 252,871 $ 7,411 $ 260,282 The following reconciles Net Income to Net Operating Income for each of the periods presented (in thousands): Year Ended December 31, 2018 2017 2016 Net income $ 80,765 $ 219,959 $ 80,104 Net operating income from unconsolidated joint ventures 28,888 31,053 28,785 Net operating income from discontinued operations — — 78,591 Fee income (10,089 ) (8,632 ) (8,347 ) Other income (3,270 ) (11,518 ) (1,050 ) Reimbursed expenses 3,782 3,527 3,259 General and administrative expenses 22,040 27,523 25,592 Interest expense 39,430 33,524 26,650 Depreciation and amortization 181,382 196,745 97,948 Acquisition and transaction costs 248 1,661 24,521 Other expenses 556 1,796 5,888 (Gain) loss on extinguishment of debt (8 ) (2,258 ) 5,180 Income from unconsolidated joint ventures (12,224 ) (47,115 ) (10,562 ) Gain on sale of investment properties (5,437 ) (133,059 ) (77,114 ) Income from discontinued operations — — (19,163 ) Net Operating Income $ 326,063 $ 313,206 $ 260,282 Revenues by reportable segment, including a reconciliation to total revenues on the consolidated statements of operations for years ended December 31, 2018 , 2017 , and 2016 are as follows (in thousands): Year ended December 31, 2018 Office Mixed-Use Total Revenues: Atlanta $ 206,129 $ — $ 206,129 Austin 104,329 — 104,329 Charlotte 92,454 — 92,454 Phoenix 50,696 — 50,696 Tampa 49,812 — 49,812 Other 2,206 3,724 5,930 Total segment revenues 505,626 3,724 509,350 Less: Company's share of rental property revenues from unconsolidated joint ventures (43,773 ) (3,724 ) (47,497 ) Total rental property revenues $ 461,853 $ — $ 461,853 Year ended December 31, 2017 Office Mixed-Use Total Revenues: Atlanta $ 176,190 $ 5,237 $ 181,427 Austin 100,939 — 100,939 Charlotte 91,434 — 91,434 Tampa 47,402 — 47,402 Phoenix 46,186 — 46,186 Orlando 24,862 — 24,862 Other 3,021 999 4,020 Total segment revenues 490,034 6,236 496,270 Less: Company's share of rental property revenues from unconsolidated joint ventures (43,999 ) (6,236 ) (50,235 ) Total rental property revenues $ 446,035 $ — $ 446,035 Year ended December 31, 2016 Office Mixed-Use Total Revenues: Atlanta $ 160,540 $ 13,043 $ 173,583 Houston 136,926 — 136,926 Austin 52,769 — 52,769 Charlotte 39,448 — 39,448 Tampa 10,994 — 10,994 Phoenix 8,902 — 8,902 Orlando 5,896 — 5,896 Other 2,443 — 2,443 Total segment revenues 417,918 13,043 430,961 Less: Company's share of rental property revenues from unconsolidated joint ventures (31,177 ) (13,043 ) (44,220 ) Less: Revenues included in discontinued operations (136,927 ) — (136,927 ) Total rental property revenues $ 249,814 $ — $ 249,814

Real Estate and Accumulated Dep

Real Estate and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2018
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]
REAL ESTATE AND ACCUMULATED DEPRECIATION	COUSINS PROPERTIES INCORPORATED AND SUBSIDIARIES REAL ESTATE AND ACCUMULATED DEPRECIATION December 31, 2018 (in thousands) Initial Cost to Company Costs Capitalized Subsequent to Acquisition Gross Amount at Which Carried at Close of Period Description/Metropolitan Area Encumbrances Land and Improvements Buildings and Improvements Land and Improvements less Cost of Sales, Transfers and Other Building and Improvements less Cost of Sales, Transfers and Other Land and Improvements less Cost of Sales, Transfers and Other Building and Improvements less Cost of Sales, Transfers and Other Total (a)(b) Accumulated Date of Construction/ Renovation Date Acquired Life on Which Depreciation in 2018 Statement of Operations is Computed (c) OPERATING PROPERTIES Colorado Tower 119,427 — — 1,600 120,853 1,600 120,853 122,453 23,757 2013 2013 30 years Austin, TX 816 Congress 81,676 6,817 89,891 3,282 23,333 10,099 113,224 123,323 25,159 — 2013 42 years Austin, TX Research Park — 4,373 — 801 42,390 5,174 42,390 47,564 5,282 2014 1998 30 years Austin, TX Northpark Town Center — 22,350 295,825 — 59,539 22,350 355,364 377,714 54,804 — 2014 39 years Atlanta, GA Promenade 99,238 13,439 102,790 — 40,193 13,439 142,983 156,422 47,862 — 2011 34 years Atlanta, GA Meridian Mark Plaza 23,524 2,219 — — 29,835 2,219 29,835 32,054 20,836 1997 1997 30 years Atlanta, GA Fifth Third Center 143,497 22,591 180,430 — 18,449 22,591 198,879 221,470 32,760 — 2014 40 years Charlotte, NC Corporate Center — 7,298 272,148 — 37,671 7,298 309,819 317,117 26,604 — 2016 40 years Tampa, FL The Pointe — 9,404 54,694 — 3,807 9,404 58,501 67,905 6,286 — 2016 40 years Tampa, FL Harborview Plaza — 10,800 39,136 — 3,256 10,800 42,392 53,192 4,257 — 2016 40 years Tampa, FL 3344 Peachtree — 16,110 176,153 — 11,798 16,110 187,951 204,061 16,117 — 2016 40 years Atlanta, GA Buckhead Plaza — 35,064 234,111 — 6,066 35,064 240,177 275,241 20,965 — 2016 40 years Atlanta, GA 3350 Peachtree — 16,836 108,177 — 2,623 16,836 110,800 127,636 9,979 — 2016 40 years Atlanta, GA 3348 Peachtree — 6,707 69,723 — 701 6,707 70,424 77,131 6,706 — 2016 40 years Atlanta, GA 8000 Avalon — 4,130 — 72 72,747 4,202 72,747 76,949 3,245 2016 2016 40 years Atlanta, GA Spring & 8th — 28,131 — 426 301,249 28,557 301,249 329,806 8,094 2015 2015 40 years Atlanta, GA Hearst Tower — 9,977 323,299 — 5,108 9,977 328,407 338,384 26,928 — 2016 40 years Charlotte, NC NASCAR Plaza — 51 115,238 — 2,389 51 117,627 117,678 10,959 — 2016 40 years Charlotte, NC Hayden Ferry — 13,102 262,578 — 19,541 13,102 282,119 295,221 26,820 — 2016 40 years Phoenix, AZ 111 West Rio — 6,076 56,647 — 16,748 6,076 73,395 79,471 4,078 2017 40 years Phoenix, AZ Tempe Gateway — 5,893 95,130 — 3,721 5,893 98,851 104,744 8,529 — 2016 40 years Phoenix, AZ One Eleven Congress — 33,841 201,707 — 25,218 33,841 226,925 260,766 17,823 — 2016 40 years Austin, TX San Jacinto Center — 34,068 176,535 (579 ) 8,180 33,489 184,715 218,204 13,645 — 2016 40 years Austin, TX Total Operating Properties $ 467,362 $ 309,277 $ 2,854,212 $ 5,602 $ 855,415 $ 314,879 $ 3,709,627 $ 4,024,506 $ 421,495 COUSINS PROPERTIES INCORPORATED AND SUBSIDIARIES REAL ESTATE AND ACCUMULATED DEPRECIATION December 31, 2018 (in thousands) Initial Cost to Company Costs Capitalized Subsequent to Acquisition Gross Amount at Which Carried at Close of Period Description/Metropolitan Area Encumbrances Land and Improvements Buildings and Improvements Land and Improvements less Cost of Sales, Transfers and Other Building and Improvements less Cost of Sales, Transfers and Other Land and Improvements less Cost of Sales, Transfers and Other Building and Improvements less Cost of Sales, Transfers and Other Total (a)(b) Accumulated Depreciation (a)(b) Date of Construction/ Renovation Date Acquired Life on Which Depreciation in 2018 Statement of Operations is Computed (c) PROJECTS UNDER DEVELOPMENT 10000 Avalon $ — $ 5,819 $ — $ — $ 18,398 $ 5,819 $ 18,398 $ 24,217 $ — 2018 2016 Suburban Atlanta, GA Total Projects Under Development $ — $ 5,819 $ — $ — $ 18,398 $ 5,819 $ 18,398 $ 24,217 $ — LAND Land Adjacent to The Avenue Forsyth $ — $ 11,240 $ — $ (7,540 ) $ — $ 3,700 $ — $ 3,700 $ — — 2007 Suburban Atlanta, GA 901 West Peachtree St. — 11,883 — — — 11,883 — 11,883 — — 2018 Atlanta, GA 100 Mill — 19,515 — — — 19,515 — 19,515 — — 2018 Phoenix, AZ 3rd and West Peachtree St. — 37,037 — — — 37,037 — 37,037 — — 2018 Atlanta, GA North Point — 10,294 — (9,866 ) — 428 — 428 — — 1970-1985 Suburban Atlanta, GA Total Land $ — $ 89,969 $ — $ (17,406 ) $ — $ 72,563 $ — $ 72,563 $ — Total Properties $ 467,362 $ 405,065 $ 2,854,212 $ (11,804 ) $ 873,813 $ 393,261 $ 3,728,025 $ 4,121,286 $ 421,495 COUSINS PROPERTIES INCORPORATED AND SUBSIDIARIES REAL ESTATE AND ACCUMULATED DEPRECIATION December 31, 2018 (in thousands) NOTES: (a) Reconciliations of total real estate carrying value and accumulated depreciation for the three years ended December 31, 2018 are as follows: Real Estate Accumulated Depreciation 2018 2017 2016 2018 2017 2016 Balance at beginning of period $ 3,893,799 $ 3,814,986 $ 2,606,343 $ 275,977 $ 215,856 $ 359,422 Additions during the period: Parkway merger — — 2,832,730 — — — Acquisitions 48,920 62,723 — — — — Improvements and other capitalized costs 178,567 303,940 208,016 — — — Transfers — — 5,306 — — — Depreciation expense — — — 145,518 101,720 112,277 Total Additions 227,487 366,663 3,046,052 145,518 101,720 112,277 Deductions during the period: Parkway spin-off — — (1,230,235 ) — — (148,523 ) Cost of real estate sold — (287,850 ) (602,648 ) — (41,599 ) (107,320 ) Impairment loss — — (4,526 ) — — — Total Deductions — (287,850 ) (1,837,409 ) — (41,599 ) (255,843 ) Balance at end of period $ 4,121,286 $ 3,893,799 $ 3,814,986 $ 421,495 $ 275,977 $ 215,856 (b) The aggregate cost for federal income tax purposes, net of depreciation, was $3.0 billion (unaudited) at December 31, 2018 . (c) Buildings and improvements are depreciated over 30 to 42 years. Leasehold improvements and other capitalized leasing costs are depreciated over the life of the asset or the term of the lease, whichever is shorter.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation: The consolidated financial statements include the accounts of the Company and its consolidated partnerships and wholly-owned subsidiaries. Intercompany transactions and balances have been eliminated in consolidation. The Company presents its financial statements in accordance with accounting principles generally accepted in the United States (“GAAP”) as outlined in the Financial Accounting Standard Board’s Accounting Standards Codification (the “Codification” or “ASC”). The Codification is the single source of authoritative accounting principles applied by nongovernmental entities in the preparation of financial statements in conformity with GAAP. For the three years ended December 31, 2018 , there were no items of other comprehensive income. Therefore, the Company did not present comprehensive income. The Company evaluates all partnerships, joint ventures, and other arrangements with variable interests to determine if the entity or arrangement qualifies as a variable interest entity (“VIE”), as defined in the Codification. If the entity or arrangement qualifies as a VIE and the Company is determined to be the primary beneficiary, the Company is required to consolidate the assets, liabilities, and results of operations of the VIE.
Recently Issued Accounting Standards	Recently Issued Accounting Standards : On January 1, 2018, the Company adopted ASU 2014-09 ("ASC 606"), "Revenue from Contracts with Customers" using the “modified retrospective” method; as such, the Company applied the guidance only to the most recent period presented in the financial statements. Under the new guidance, companies are required to recognize revenue when the seller satisfies a performance obligation, which would be when the buyer takes control of the good or service. Prior to adoption of ASC 606, gains or losses from real estate sales were adjusted at the time of the sale by the maximum exposure to loss related to continuing involvement with the real estate asset. After adoption, any continuing involvement is considered a separate performance obligation and the sales price is required to be allocated between the elements with continuing involvement and those without continuing involvement. As the continuing performance obligations are satisfied, additional gains or losses are recognized. The Company had no sales of real estate with continuing involvement during 2018 or in any prior periods that affected results of operations in 2018 or could affect results of operations in future periods. The Company categorizes its primary sources of revenue into revenue from contracts with customers and other revenue accounted for as leases under Accounting Standards Codification Topic 840 - Leases ("ASC 840") as follows: • Rental property revenue consists of (1) contractual revenues from leases recognized on a straight-line basis over the term of the respective lease; (2) percentage rents recognized once a specified sales target is achieved; (3) parking revenue; and (4) the reimbursement of the tenants' share of real estate taxes, insurance, and other operating expenses. Rental property revenue is accounted for in accordance with the guidance set forth in ASC 840. • Fee revenue consists of development fees, management fees, and leasing fees earned from unconsolidated joint ventures and from third parties. Fee revenue is accounted for in accordance with the guidance set forth in ASC 606. • Other revenue consists primarily of termination fees, which are accounted for in accordance with the guidance set forth in ASC 840. Fee revenue and other revenue, as a whole, are immaterial to total revenues. The Company made no changes to previously reported amounts related to the adoption of ASC 606. For the years ended December 31, 2018 , 2017 , and 2016 the Company recognized rental property revenue of $461.9 million , $446.0 million , and $249.8 million , respectively. For the years ended December 31, 2018 , 2017 , and 2016 the Company recognized fee and other revenue of $13.4 million , $20.2 million , and $9.4 million , respectively. In February 2016, the FASB issued ASU 2016-02, "Leases," ("ASC 842") which amends the existing standards for lease accounting by requiring lessees to record most leases on their balance sheets and making targeted changes to lessor accounting and reporting. The new standard will require lessees to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months and classify such leases as either finance or operating leases based on the principle of whether the lease is effectively a financed purchase of the leased asset by the lessee. This classification will determine whether the lease expense is recognized based on an effective interest method (finance leases) or on a straight-line basis over the term of the lease (operating leases). Leases with a term of 12 months or less will be accounted for similarly to existing guidance for operating leases. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance. In July 2018, the FASB amended the new leasing standard, providing lessors with a practical expedient to not separately classify and disclose non-lease components of revenue from the related lease components under certain conditions. The new standard also revises the treatment of indirect leasing costs and permits the capitalization and amortization of direct leasing costs only. In 2018, the Company capitalized $3.8 million of indirect leasing costs. Because the Company expects substantially all of its leases with tenants to qualify for the practical expedient, the Company's accounting and reporting for leases as lessor is not expected to change materially. For those leases where the Company is lessee, specifically ground leases, the adoption of ASC 842 will require the Company to record a right of use asset and a lease liability on the consolidated balance sheet. Ground leases executed before the adoption of ASC 842 will continue to be accounted for as operating leases and will not result in a materially different ground lease expense. However, ground leases executed after the adoption of ASC 842 are expected to be accounted for as finance leases which will result in ground lease expense being recorded using the effective interest method instead of the straight-line method over the term of the lease, which would result in higher ground lease expense in the earlier years of a ground lease when compared to the straight line method. The Company expects to use the "modified retrospective" method upon adoption of ASC 842 on January 1, 2019, which permits application of the new standard on the adoption date as opposed to the earliest comparative period presented in its financial statements. The Company expects to record a right of use asset and a lease liability in the amount of approximately $40 million upon the adoption of ASC 842. In February 2017, the FASB issued ASU No. 2017-05, “Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets” (“ASU 2017-05”). ASU 2017-05 updates the definition of an “in substance nonfinancial asset” and clarifies the derecognition guidance for nonfinancial assets to conform with the new revenue recognition standard. Among other things, ASU 2017-05 requires companies to recognize 100% of the gain on the transfer of a nonfinancial asset to an entity in which it has a noncontrolling interest. ASU 2017-05 is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. The Company adopted this guidance using the "modified retrospective" method effective on January 1, 2018. As a result of the adoption of ASU 2017-05, the Company recorded a cumulative effect from change in accounting principle which credited distributions in excess of cumulative net income by $22.3 million . This cumulative effect adjustment resulted from the 2013 transfer of a wholly-owned property to an entity in which it had a noncontrolling interest. In May 2017, FASB issued ASU 2017-09, "Scope of Modification Accounting," which amends the scope of modification accounting for share-based payment arrangements and provides guidance on the types of changes to the terms or conditions of share-based payment awards to which an entity would be required to apply modification accounting under ASC 718, "Compensation—Stock Compensation." This update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017, with early adoption permitted. The Company adopted this standard on January 1, 2018. Adoption of the standard did not have a material impact on the Company's financial statements.
Cost Capitalization, Depreciation and Amortization	Cost Capitalization: Costs related to planning, developing, leasing, and constructing a property, including costs of development personnel working directly on projects under development, are capitalized. In addition, the Company capitalizes interest to qualifying assets under development based on average accumulated expenditures outstanding during the period. In capitalizing interest to qualifying assets, the Company first uses the interest incurred on specific project debt, if any, and next uses the Company’s weighted average interest rate for non-project specific debt. The Company also capitalizes interest to investments accounted for under the equity method when the investee has property under development with a carrying value in excess of the investee’s borrowings. To the extent debt exists within an unconsolidated joint venture during the construction period, the venture capitalizes interest on that venture-specific debt. The Company capitalizes interest, real estate taxes, and certain operating expenses on the unoccupied portion of recently completed development properties from the date a project is substantially complete to the earlier of (1) the date on which the project achieves 90% economic occupancy or (2) one year after it is substantially complete. Through December 31, 2018, the Company capitalized direct and indirect leasing costs related to leases that are probable of being executed. These costs included commissions paid to outside brokers, legal costs incurred to negotiate and document a lease agreement, and internal costs that are based on time spent by leasing personnel on successful leases. The Company allocated these costs to individual tenant leases and amortized them over the related lease term. Depreciation and Amortization: Real estate assets are stated at depreciated cost less impairment losses, if any. Buildings are depreciated over their estimated useful lives, which range generally from 30 to 42 years. The life of a particular building depends upon a number of factors including whether the building was developed or acquired and the condition of the building upon acquisition. Furniture, fixtures and equipment are depreciated over their estimated useful lives of three to five years. Tenant improvements, leasing costs and leasehold improvements are amortized over the term of the applicable leases or the estimated useful life of the assets, whichever is shorter. The Company accelerates the depreciation of tenant assets if it estimates that the lease term will end prior to the termination date. This acceleration may occur if a tenant files for bankruptcy, vacates its premises or defaults in another manner on its lease. Deferred expenses are amortized over the period of estimated benefit. The Company uses the straight-line method for all depreciation and amortization.
Impairment	Impairment: For real estate assets that are considered to be held for sale according to accounting guidance or those that are distributed to stockholders in a spin-off, the Company records impairment losses if the fair value of the asset or disposal group net of estimated selling costs is less than the carrying amount. For those long-lived assets that are held and used according to accounting guidance, management reviews each asset for the existence of any indicators of impairment. If indicators of impairment are present, the Company calculates the expected undiscounted future cash flows to be derived from such assets. If the undiscounted cash flows are less than the carrying amount of the asset, the Company reduces the asset to its fair value and records an impairment loss.
Acquisition of Real Estate Assets	Acquisition of Real Estate Assets: The Company records the acquired tangible and intangible assets and assumed liabilities of operating property acquisitions at fair value at the acquisition date. The acquired assets and assumed liabilities for an operating property acquisition generally include but are not limited to: land, buildings and improvements, and identified tangible and intangible assets and liabilities associated with in-place leases, including leasing costs, value of above-market and below-market tenant leases, value of above-market and below-market ground leases, acquired in-place lease values, and tenant relationships, if any. The fair value of land is derived from comparable sales of land within the same submarket and/or region. The fair value of buildings and improvements, tenant improvements, and leasing costs are based upon current market replacement costs and other relevant market rate information. The fair value of the above-market or below-market component of an acquired lease is based upon the present value (calculated using a market discount rate) of the difference between (i) the contractual rents to be paid pursuant to the lease over its remaining term and (ii) management’s estimate of the rents that would be paid using fair market rental rates and rent escalations at the date of acquisition over the remaining term of the lease. The amounts recorded for above-market and below-market ground leases are included in intangible liabilities and intangible assets, respectively, and are amortized on a straight-line basis into rental property revenues over the remaining terms of the applicable leases. The fair value of acquired in-place leases is derived based on management’s assessment of lost revenue and costs incurred for the period required to lease the “assumed vacant” property to the occupancy level when purchased. The amount recorded for acquired in-place leases is included in intangible assets and amortized as an increase to depreciation and amortization expense over the remaining term of the applicable leases.
Discontinued Operations	Discontinued Operations: Assets held for sale or disposals representing strategic shifts in operations are reflected in discontinued operations. During 2016, the Company completed a spin-off as described in note 3. The Company considered this disposition to be a strategic shift in operations and reclassified the historical operations of the assets included in the spin-off into discontinued operations on the consolidated statements of operations. During 2017 and 2018, there were no assets held for sale or disposals that represented a strategic shift in operations. The Company ceases depreciation of a property when it is categorized as held for sale.
Investment in Joint Ventures	Investment in Joint Ventures For joint ventures that the Company does not control, but over which it exercises significant influence, the Company uses the equity method of accounting. The Company's judgment with regard to its level of influence or control of an entity involves consideration of various factors including the form of its ownership interest; its representation in the entity's governance; its ability to participate in policy-making decisions; and the rights of other investors to participate in the decision-making process, to replace the Company as manager, and/or to liquidate the venture. These ventures are recorded at cost and adjusted for equity in earnings (losses) and cash contributions and distributions. Any difference between the carrying amount of these investments on the Company’s balance sheet and the underlying equity in net assets on the joint venture’s balance sheet is adjusted as the related underlying assets are depreciated, amortized, or sold. The Company generally allocates income and loss from an unconsolidated joint venture based on the venture's distribution priorities, which may be different from its stated ownership percentage. The Company evaluates the recoverability of its investment in unconsolidated joint ventures in accordance with accounting standards for equity investments by first reviewing each investment for any indicators of impairment. If indicators are present, the Company estimates the fair value of the investment. If the carrying value of the investment is greater than the estimated fair value, management makes an assessment of whether the impairment is “temporary” or “other-than-temporary.” In making this assessment, management considers the following: (1) the length of time and the extent to which fair value has been less than cost, (2) the financial condition and near-term prospects of the entity, and (3) the Company’s intent and ability to retain its interest long enough for a recovery in market value. If management concludes that the impairment is "other than temporary," the Company reduces the investment to its estimated fair value.
Noncontrolling Interest	Noncontrolling Interest The Company consolidates CPLP and certain joint ventures in which it owns a controlling interest. In cases where the entity’s documents do not contain a required redemption clause, the Company records the partner’s share of the entity in the equity section of the balance sheets in nonredeemable noncontrolling interests. In cases where the entity’s documents contain a provision requiring the Company to purchase the partner’s share of the venture at a certain value upon demand or at a future date, the Company records the partner’s share of the entity in redeemable noncontrolling interests on the balance sheets. The outside partners' interests in CPLP are redeemable into shares of cash or common stock of the Company at the Company's sole discretion. Therefore, noncontrolling interests associated with CPLP are considered nonredeemable noncontrolling interests. The noncontrolling partners' share of all consolidated entities' income is reflected in net income attributable to noncontrolling interest on the statements of operations.
Revenue Recognition	Revenue Recognition Rental Property Revenues: The Company recognizes contractual revenues from leases on a straight-line basis over the term of the respective lease. Certain of these leases also provide for percentage rents based upon the level of sales achieved by the lessee. Percentage rents are recognized once the specified sales target is achieved. In addition, leases typically provide for reimbursement of the tenants' share of real estate taxes, insurance, and other operating expenses to the Company. Operating expense reimbursements are recognized as the related expenses are incurred. During 2018 , 2017 , and 2016 , the Company recognized $79.8 million , $67.2 million , and $90.2 million , respectively, in revenues, including discontinued operations, from tenants related to operating expenses. The Company makes valuation adjustments to all tenant-related accounts receivable based upon its estimate of the likelihood of collectibility of amounts due from the tenant. The amount of any valuation adjustment is based on the tenant’s credit and business risk, history of payment, and other factors considered by management. Fee Income: The Company recognizes development, management, and leasing fees as it satisfies the related performance obligations under the respective contracts. The Company recognizes development and leasing fees received from unconsolidated joint ventures and related salaries and other direct costs incurred by the Company as income and expense based on the percentage of the joint venture which the Company does not own. Correspondingly, the Company adjusts its investment in unconsolidated joint ventures when fees are paid to the Company by a joint venture in which the Company has an ownership interest. Gain on Sale of Investment Properties : Prior to the adoption of ASC 606, the Company recognized gains or losses on sale of investment property when the sale of a property was consummated, the buyer’s initial and continuing investment was adequate to demonstrate commitment to pay, any receivable obtained was not subject to future subordination, the usual risks and rewards of ownership were transferred, and the Company had no substantial continuing involvement with the property. If the Company had a commitment to the buyer and that commitment was a specific dollar amount, this commitment was accrued and the gain on sale that the Company recognized was reduced. If the Company had a construction commitment to the buyer, management made an estimate of this commitment, deferred a portion of the profit from the sale, and recognized the deferred profit when the commitment was fulfilled. After adoption of ASC 606, the Company recognizes a gain on the sale of investment property at the time the buyer obtains control of the investment property. If the Company maintains any continuing involvement with the investment property, that continuing involvement is considered to be one or more additional performance obligations and additional gains on losses will be recognized as these performance obligations are satisfied.
Receivables	The Company makes valuation adjustments to all tenant-related accounts receivable based upon its estimate of the likelihood of collectibility of amounts due from the tenant. The amount of any valuation adjustment is based on the tenant’s credit and business risk, history of payment, and other factors considered by management.
Income Taxes	Income Taxes Cousins has elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). To qualify as a REIT, Cousins must distribute annually at least 90% of its adjusted taxable income, as defined in the Code, to its stockholders and satisfy certain other organizational and operating requirements. It is management’s current intention to adhere to these requirements and maintain Cousins’ REIT status. As a REIT, Cousins generally will not be subject to federal income tax at the corporate level on the taxable income it distributes to its stockholders. If Cousins fails to qualify as a REIT in any taxable year, it will be subject to federal income taxes at regular corporate rates and may not be able to qualify as a REIT for four subsequent taxable years. Cousins may be subject to certain state and local taxes on its income and property, and to federal income taxes on its undistributed taxable income. CTRS is a C-Corporation for federal income tax purposes and uses the liability method for accounting for income taxes. Tax return positions are recognized in the financial statements when they are “more-likely-than-not” to be sustained upon examination by the taxing authority. Deferred income tax assets and liabilities result from temporary differences. Temporary differences are differences between the tax bases of assets and liabilities and their reported amounts in the financial statements that will result in taxable or deductible amounts in future periods. A valuation allowance may be placed on deferred income tax assets, if it is determined that it is more likely than not that a deferred tax asset may not be realized.
Earnings per Share (EPS)	Earnings per Share (“EPS”) Net income per share-basic is calculated as net income available to common stockholders divided by the weighted average number of common shares outstanding during the period, including nonvested restricted stock which has nonforfeitable dividend rights. Net income per share-diluted is calculated as net income available to common stockholders plus noncontrolling interests in CPLP divided by the diluted weighted average number of common shares outstanding during the period. Diluted weighted average number of common shares uses the same weighted average share number as in the basic calculation and adds the potential dilution that would occur if the outside units in CPLP were converted into the Company's common stock and stock options (or any other contracts to issue common stock) were exercised and resulted in additional common shares outstanding, calculated using the treasury stock method. Stock options are dilutive when the average market price of the Company’s stock during the period exceeds the option exercise price.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include unrestricted cash and highly-liquid money market instruments. Highly-liquid money market instruments include securities and repurchase agreements with original maturities of three months or less , money market mutual funds, and United States Treasury Bills with maturities of 30 days or less .
Restricted Cash	Restricted Cash Restricted Cash includes escrow accounts held by lenders to pay real estate taxes, earnest money paid in connection with future acquisitions, and proceeds from property sales held by qualified intermediaries for potential like-kind exchanges in accordance with Section 1031 of the Code
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Reportable Segments	The Company's segments are based on the method of internal reporting which classifies operations by property type and geographical area. The segments by property type are: Office and Mixed-Use. The segments by geographical region are: Atlanta, Charlotte, Austin, Phoenix, Tampa, Orlando, Houston, and Other. In 2016, the Company disposed of its Houston properties as part of the Spin-Off. In 2017, the Company sold its Orlando Properties. These reportable segments represent an aggregation of operating segments reported to the Chief Operating Decision Maker based on similar economic characteristics that include the type of product and the geographical location. Each segment includes both consolidated operations and the Company's share of joint venture operations. Company management evaluates the performance of its reportable segments in part based on net operating income (“NOI”). NOI represents rental property revenues less rental property operating expenses. NOI is not a measure of cash flows or operating results as measured by GAAP, is not indicative of cash available to fund cash needs and should not be considered an alternative to cash flows as a measure of liquidity. All companies may not calculate NOI in the same manner. The Company considers NOI to be an appropriate supplemental measure to net income as it helps both management and investors understand the core operations of the Company's operating assets. NOI excludes corporate general and administrative expenses, interest expense, depreciation and amortization, impairments, gains/loss on sales of real estate, and other non-operating items. Segment net income, amount of capital expenditures, and total assets are not presented in the following tables because management does not utilize these measures when analyzing its segments or when making resource allocation decisions.

Transactions With Parkway Pro_2

Transactions With Parkway Properties, Inc. (Tables)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Unaudited supplemental pro forma information	The following unaudited supplemental pro forma information presented for the year ended December 31, 2016, is based upon the Company's historical consolidated statements of operations, adjusted as if the Merger had occurred on January 1, 2015. This supplemental pro forma information is not necessarily indicative of future results, or of actual results, that would have been achieved had the transactions been consummated at the beginning of the period (unaudited, in thousands, except per share amounts). Revenues $ 732,117 Income from continuing operations 179,625 Net income 174,117 Net income available to common stockholders 166,375 Per share information: Basic $ 0.42 Diluted $ 0.41
Summary of discontinued operations	The following table includes a summary of discontinued operations of the Company for the year ended December 31, 2016 (in thousands). Rental property revenues $ 136,927 Rental property operating expenses (58,336 ) Other revenues 288 Interest expense (6,022 ) Depreciation and amortization (47,345 ) Other expenses (6,349 ) Income from discontinued operations $ 19,163 Cash provided by operating activities $ 42,604 Cash used in investing activities $ 30,067

Real Estate Transactions (Table

Real Estate Transactions (Tables)	12 Months Ended
	Dec. 31, 2018
Real Estate [Abstract]
Properties sold that qualify as discontinued operations	The Company had no dispositions in 2018 . The Company sold the following properties in 2017 and 2016 ($ in thousands): Property Property Type Location Square Feet Sales Price 2017 American Cancer Society Center Office Atlanta, GA 996,000 $ 166,000 Bank of America Center, One Orlando Centre, -- and Citrus Center Office Orlando, FL 1,038,000 $ 208,100 2016 Post Oak Central Office Houston, TX 1,280,000 (1 ) Greenway Plaza Office Houston, TX 4,348,000 (1 ) 191 Peachtree Office Atlanta, GA 1,225,000 $ 267,500 Two Liberty Place Office Philadelphia, PA 941,000 $ 219,000 Lincoln Place Office Miami, FL 140,000 $ 80,000 The Forum Office Atlanta, GA 220,000 $ 70,000 100 North Point Center East Office Atlanta, GA 129,000 $ 22,000 (1) Properties distributed to New Parkway in the Spin-Off.

Notes and Accounts Receivable (

Notes and Accounts Receivable (Tables)	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Components of notes and accounts receivables	At December 31, 2018 and 2017 , notes and accounts receivables included the following (in thousands): 2018 2017 Notes receivable $ 453 $ 465 Tenant and other receivables 13,997 14,490 Allowance for doubtful accounts related to tenant and other receivables (629 ) (535 ) $ 13,821 $ 14,420

Investment in Unconsolidated _2

Investment in Unconsolidated Joint Ventures (Tables)	12 Months Ended
	Dec. 31, 2018
Equity Method Investments and Joint Ventures [Abstract]
Summary of financial data and principal activities of unconsolidated joint ventures	The information included in the following table entitled summary of financial position is as of December 31, 2018 and 2017 . The information included in the summary of operations table is for the years ended December 31, 2018 , 2017 , and 2016 (in thousands). Total Assets Total Debt Total Equity (Deficit) Company's Investment SUMMARY OF FINANCIAL POSITION 2018 2017 2018 2017 2018 2017 2018 2017 Terminus Office Holdings $ 258,060 $ 261,999 $ 198,732 $ 203,131 $ 50,539 $ 48,033 $ 48,571 $ 24,898 DC Charlotte Plaza LLLP 155,530 53,791 — — 88,922 42,853 46,554 22,293 Austin 300 Colorado Project, LP 51,180 — — — 41,298 — 22,335 — Carolina Square Holdings LP 106,187 106,580 74,638 64,412 28,844 33,648 16,840 19,384 HICO Victory Center LP 15,069 14,403 — — 14,801 14,401 10,003 9,752 Charlotte Gateway Village, LLC 112,553 124,691 — — 109,666 121,386 8,225 14,568 AMCO 120 WT Holdings, LLC 36,680 18,066 — — 31,372 16,354 5,538 1,664 CL Realty, L.L.C. 4,169 8,287 — — 4,183 8,127 2,886 2,980 Temco Associates, LLC 1,482 4,441 — — 1,379 4,337 919 875 EP II LLC 247 277 — — 165 180 30 44 EP I LLC 461 521 — — 296 319 6 25 Wildwood Associates 11,157 16,337 — — 11,108 16,297 (460 ) (1) (1,151 ) (1) Crawford Long - CPI, LLC 26,429 27,362 69,522 71,047 (44,146 ) (44,815 ) (21,071 ) (1) (21,323 ) (1) Other — 6,379 — — — 6,303 — 4,931 $ 779,204 $ 643,134 $ 342,892 $ 338,590 $ 338,427 $ 267,423 $ 140,376 $ 78,940 Total Revenues Net Income (Loss) Company's Share of Net Income (Loss) SUMMARY OF OPERATIONS 2018 2017 2016 2018 2017 2016 2018 2017 2016 Charlotte Gateway Village, LLC $ 26,932 $ 26,465 $ 34,156 $ 10,285 $ 9,528 $ 14,536 $ 5,143 $ 4,764 $ 2,194 Terminus Office Holdings 44,429 43,959 42,386 5,506 6,307 4,608 2,755 3,153 2,303 Wildwood Associates — — — (1,140 ) (116 ) (140 ) 2,723 (58 ) (70 ) Crawford Long - CPI, LLC 12,383 12,079 12,113 3,446 3,171 2,743 1,641 1,572 1,372 HICO Victory Center LP 400 429 383 400 431 376 219 225 187 Austin 300 Colorado Project, LP 487 — — 220 — — 110 — — Temco Associates, LLC 176 192 1,343 (2,965 ) 123 440 43 46 502 Courvoisier Centre JV, LLC — 15,106 3,968 — (1,750 ) (489 ) 5 521 (93 ) DC Charlotte Plaza LLLP — 2 47 — 2 45 (1 ) 1 24 EP II LLC 5 2,644 5,376 (16 ) 13,008 (1,187 ) (14 ) 9,756 (878 ) EP I LLC 17 4,123 12,239 (23 ) 45,115 2,294 (20 ) 28,667 1,684 CL Realty, L.L.C. — 2,964 567 (161 ) 2,668 237 (94 ) 536 128 Carolina Square Holdings LP 10,686 2,701 58 (169 ) (532 ) 9 (275 ) 522 — AMCO 120 WT Holdings, LLC — — — 38 58 — — — — Other — — 4,219 (69 ) (69 ) 3,926 (11 ) (2,590 ) 3,209 $ 95,515 $ 110,664 $ 116,855 $ 15,352 $ 77,944 $ 27,398 $ 12,224 $ 47,115 $ 10,562 (1) Negative balances are included in deferred income on the consolidated balance sheets.

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of intangible assets	At December 31, 2018 and 2017 , intangible assets included the following (in thousands): 2018 2017 In-place leases, net of accumulated amortization of $125,130 and $91,548 in 2018 and 2017, respectively $ 105,964 $ 139,548 Above-market tenant leases, net of accumulated amortization of $19,502 and $13,038 in 2018 and 2017, respectively 20,453 26,917 Below-market ground lease, net of accumulated amortization of $621 and $345 in 2018 and 2017, respectively 17,792 18,067 Goodwill 1,674 1,674 $ 145,883 $ 186,206
Aggregate amortization of intangible assets and liabilities	Over the next five years and thereafter, aggregate amortization of these intangible assets and liabilities is anticipated to be as follows (in thousands): Below Market Above Market Below Market Ground Lease Above Market In Place Leases Total 2019 $ (11,645 ) $ (46 ) $ 276 $ 5,308 $ 26,161 $ 20,054 2020 (10,519 ) (46 ) 276 4,433 21,230 15,374 2021 (8,753 ) (46 ) 276 3,374 16,366 11,217 2022 (6,185 ) (46 ) 276 2,292 11,309 7,646 2023 (4,844 ) (46 ) 276 1,710 8,843 5,939 Thereafter (13,272 ) (1,488 ) 16,412 3,336 22,055 27,043 $ (55,218 ) $ (1,718 ) $ 17,792 $ 20,453 $ 105,964 $ 87,273 Weighted average remaining lease term 6 years 37 years 65 years 6 years 6 years 10 years

Other Assets (Tables)

Other Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of other assets	At December 31, 2018 and 2017 , other assets included the following (in thousands): 2018 2017 Furniture, fixtures and equipment, leasehold improvements, and other deferred costs, net of accumulated depreciation of $25,193 and $21,925 in 2018 and 2017, respectively $ 14,942 $ 12,241 Prepaid expenses and other assets 5,087 3,902 Lease inducements, net of accumulated amortization of $1,545 and $978 in 2018 and 2017, respectively 4,961 3,126 Line of credit deferred financing costs, net of accumulated amortization of $1,451 and $3,119 in 2018 and 2017, respectively 5,844 1,213 Predevelopment costs and earnest money 8,249 372 $ 39,083 $ 20,854

Notes Payable (Tables)

Notes Payable (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Summary of terms of notes payable	The following table summarizes the terms of notes payable outstanding at December 31, 2018 and 2017 (in thousands): Description Interest Rate Maturity * 2018 2017 Term Loan, unsecured 3.70% 2021 $ 250,000 $ 250,000 Senior Notes, unsecured 3.91% 2025 250,000 250,000 Fifth Third Center 3.37% 2026 143,497 146,557 Colorado Tower 3.45% 2026 119,427 120,000 Senior Notes, unsecured 4.09% 2027 100,000 100,000 Promenade 4.27% 2022 99,238 102,355 816 Congress 3.75% 2024 81,676 83,304 Meridian Mark Plaza 6.00% 2020 23,524 24,038 Credit Facility, unsecured 3.55% 2023 — — The Pointe 4.01% 2019 — 22,510 $ 1,067,362 $ 1,098,764 Unamortized premium, net — 219 Unamortized loan costs (4,792 ) (5,755 ) Total Notes Payable $ 1,062,570 $ 1,093,228 *Weighted average maturity of notes payable outstanding at December 31, 2018 was 5.7 years.
Schedule of pricing spreads and facility fee
Summary of interest recorded	For the years ended December 31, 2018 , 2017 , and 2016 , interest was recorded as follows (in thousands): 2018 2017 2016 Total interest incurred $ 44,332 $ 42,767 $ 31,347 Interest capitalized (4,902 ) (9,243 ) (4,697 ) Total interest expense $ 39,430 $ 33,524 $ 26,650
Schedule of future principal payments due	Future principal payments due (including scheduled amortization payments and payments due upon maturity) on the Company's notes payable at December 31, 2018 are as follows (in thousands): 2019 $ 10,997 2020 33,825 2021 261,258 2022 97,042 2023 8,274 Thereafter 655,966 $ 1,067,362

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of amounts due under lease commitments	Amounts due under ground and operating lease commitments are as follows (in thousands): 2019 $ 2,582 2020 2,484 2021 2,461 2022 2,396 2023 2,374 Thereafter 193,346 $ 205,643

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Summary of distribution of taxable income	The following reconciles dividends paid and dividends applied in 2018 , 2017 , and 2016 to meet REIT distribution requirements (in thousands): 2018 2017 2016 Common and preferred dividends $ 107,167 $ 99,138 $ 1,077,179 Dividends treated as taxable compensation (150 ) (129 ) (92 ) Portion of dividends declared in current year, and paid in current year, which was applied to the prior year distribution requirements — — — Portion of dividends declared in subsequent year, and paid in subsequent year, which apply to current year distribution requirements — — — Dividends in excess of current year REIT distribution requirements — — (827,005 ) Dividends applied to meet current year REIT distribution requirements $ 107,017 $ 99,009 $ 250,082
Summary of components of the taxability of the Company's dividends	The following summarizes the components of the taxability of the Company’s common stock distributions for the years ended December 31, 2018 , 2017 , and 2016 : Total Ordinary Long-Term Unrecaptured Nondividend Distributions AMT Adjustment (2) 2018 $ 0.255000 $ 0.251396 $ 0.003604 $ — $ — $ — 2017 $ 0.240000 $ 0.093312 $ 0.146688 $ 0.070522 $ — $ 0.017756 2016 $ 2.853075 $ 0.079661 $ 0.582778 $ 0.100934 $ 2.190636 $ — (1) Represents a portion of the dividend allocated to long-term capital gain. (2) The Company apportioned certain 2017 alternative minimum tax adjustments to its shareholders. Individual taxpayers should refer to Internal Revenue Service Form 6251, Alternative Minimum Tax - Individuals. Corporate taxpayers should refer to Internal Revenue Service Form 4626, Alternative Minimum Tax - Corporations.

Future Minimum Rents (Tables)

Future Minimum Rents (Tables)	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
Future minimum rentals to be received under existing non-cancelable leases	At December 31, 2018 , future minimum rents to be received by consolidated entities under existing non-cancelable leases are as follows (in thousands): 2019 $ 328,607 2020 330,477 2021 314,410 2022 280,959 2023 256,233 Thereafter 1,115,490 $ 2,626,176

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Assumptions used to estimate the fair value of the stock options and their results	The weighted average fair value of options granted was $0.84 per option, and the Company computed the fair value of options granted using the Black-Scholes option pricing model with the following assumptions: Risk-free interest rate 1.37 % Assumed dividend yield 3.60 % Assumed lives of option awards (in years) 6.4 Assumed volatility 23.23 %
Stock options activity	The following is a summary of stock option activity for the years ended December 31, 2018 , 2017 , and 2016 (options in thousands): Number of Options Weighted Average Exercise Price Per Option Outstanding at December 31, 2015 1,763 $ 22.05 Granted as a result of the Merger and Spin-Off 1,222 11.78 Exercised (2 ) 8.35 Forfeited/Expired (721 ) 27.24 Outstanding at December 31, 2016 2,262 10.82 Exercised (577 ) 7.51 Forfeited/Expired (756 ) 18.47 Outstanding at December 31, 2017 929 6.59 Exercised (457 ) 6.60 Forfeited/Expired (14 ) 18.72 Outstanding at December 31, 2018 458 $ 6.00 Options Exercisable at December 31, 2018 458 $ 6.00
Summary of restricted stock activity	The following table summarizes restricted stock activity for the years ended December 31, 2018 , 2017 , and 2016 (shares in thousands): Number of Shares Weighted-Average Grant Date Fair Value Non-vested restricted stock at December 31, 2015 293 $ 10.65 Granted 235 8.62 Granted as a result of the Spin-Off 114 7.57 Vested (141 ) 8.54 Forfeited (30 ) 9.77 Non-vested restricted stock at December 31, 2016 471 7.57 Granted 308 8.63 Vested (214 ) 7.50 Forfeited (8 ) 6.53 Non-vested restricted stock at December 31, 2017 557 7.93 Granted 315 8.51 Vested (259 ) 7.83 Forfeited (22 ) 8.22 Non-vested restricted stock at December 31, 2018 591 $ 8.27
Summary of all performance-based RSU activity	The following table summarizes the performance-based RSU activity as of December 31, 2018 , 2017 , and 2016 (in thousands): Outstanding at December 31, 2015 843 Granted 312 Granted as a result of the Spin-Off 308 Vested (160 ) Forfeited (30 ) Outstanding at December 31, 2016 1,273 Granted 399 Vested (576 ) Forfeited (12 ) Outstanding at December 31, 2017 1,084 Granted 450 Vested (296 ) Forfeited (36 ) Outstanding at December 31, 2018 1,202

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Difference between income tax benefit (provision) and the amount computed by applying the statutory federal income tax rate to income before taxes	The net income tax benefit differs from the amount computed by applying the statutory federal income tax rate to CTRS' income before taxes follows ($ in thousands): 2018 2017 2016 Amount Rate Amount Rate Amount Rate Federal income tax benefit (expense) $ 143 21 % $ 47 35 % $ (1,159 ) (35 )% State income tax benefit (expense), net of federal income tax effect 27 4 % 5 4 % (132 ) (4 )% Change in deferred tax assets as a result of change in tax law — — % (340 ) (254 )% — — % Valuation allowance (174 ) (26 )% 283 211 % 1,282 39 % Other 4 1 % 5 4 % 9 — % Benefit applicable to income (loss) from continuing operations $ — — % $ — — % $ — — %
Tax effect of significant temporary differences representing deferred tax assets and liabilities	The tax effect of significant temporary differences representing deferred tax assets and liabilities of CTRS as of December 31, 2018 and 2017 are as follows (in thousands): 2018 2017 Income from unconsolidated joint ventures $ 18 $ 19 Federal and state tax carryforwards 763 590 Other 2 — Total deferred tax assets 783 609 Valuation allowance (783 ) (609 ) Net deferred tax asset $ — $ —

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Computation of basic and diluted earnings per share	The following table sets forth the computation of the basic and diluted earnings per share of the Company's consolidated statements of operations for the years ended December 31, 2018 , 2017 and 2016 (in thousands, except per share amounts): Year Ended December 31 2018 2017 2016 Earnings per common share - basic: Numerator: Income from continuing operations $ 80,765 $ 219,959 $ 60,941 Net income attributable to noncontrolling interests in CPLP from continuing operations (1,345 ) (3,681 ) (784 ) Net income attributable to other noncontrolling interests from continuing operations (256 ) (3 ) (211 ) Income from continuing operations available for common stockholders 79,164 216,275 59,946 Income from discontinued operations — — 19,163 Net income available for common stockholders $ 79,164 $ 216,275 $ 79,109 Denominator: Weighted average common shares - basic 420,305 415,610 253,895 Earnings per common share - basic: Income from continuing operations available for common stockholders $ 0.19 $ 0.52 $ 0.24 Income from discontinued operations available for common stockholders — — 0.07 Net income available for common stockholders $ 0.19 $ 0.52 $ 0.31 Earnings per common share - diluted: Numerator: Income from continuing operations $ 80,765 $ 219,959 $ 60,941 Net income attributable to other noncontrolling interests from continuing operations (256 ) (3 ) (211 ) Income from continuing operations available for common stockholders 80,509 219,956 60,730 Income from discontinued operations available for common stockholders — — 19,163 Net income available for common stockholders before net income attributable to noncontrolling interests in CPLP $ 80,509 $ 219,956 $ 79,893 Denominator: Weighted average common shares - basic 420,305 415,610 253,895 Add: Potential dilutive common shares - stock options 194 312 178 Weighted average units of CPLP convertible into common shares 6,974 7,375 1,950 Weighted average common shares - diluted 427,473 423,297 256,023 Earnings per common share - diluted: Income from continuing operations available for common stockholders $ 0.19 $ 0.52 $ 0.24 Income from discontinued operations available for common stockholders — — 0.07 Net income available for common stockholders $ 0.19 $ 0.52 $ 0.31

Consolidated Statements of Ca_3

Consolidated Statements of Cash Flows - Supplemental Information (Tables)	12 Months Ended
	Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract]
Supplemental information related to cash flows	Supplemental information related to cash flows, including significant non-cash activity affecting the consolidated statements of cash flows, for the years ended December 31, 2018 , 2017 , and 2016 is as follows (in thousands): 2018 2017 2016 Interest paid, net of amounts capitalized $ 43,166 $ 30,572 $ 32,215 Income taxes paid — — — Non-Cash Transactions: Transfer from projects under development to operating properties 325,490 58,928 — Common stock dividends declared and accrued 27,326 25,202 — Cumulative effect of change in accounting principle 22,329 — — Transfer from investment in unconsolidated joint ventures to projects under development 7,025 — 5,880 Change in accrued property acquisition, development, and tenant asset expenditures (18,104 ) 5,965 7,918 Transfer from investment in unconsolidated joint venture to operating properties — 68,498 — Non-cash assets and liabilities assumed in Merger — — 1,856,255 Non-cash assets and liabilities distributed in Spin-Off — — (948,306 ) Mortgage note payable legally defeased — — 20,170 Transfer from land held to projects under development — — 8,099
Reconciliation of cash, cash equivalents, and restricted cash	The following table provides a reconciliation of cash, cash equivalents, and restricted cash recorded on the balance sheet to cash, cash equivalents, and restricted cash in the statements of cash flows (in thousands): Year Ended December 31, 2018 2017 2016 Cash and cash equivalents $ 2,547 $ 148,929 $ 35,687 Restricted cash 148 56,816 15,634 Total cash, cash equivalents, and restricted cash $ 2,695 $ 205,745 $ 51,321
Reconciliation of cash, cash equivalents, and restricted cash	The following table provides a reconciliation of cash, cash equivalents, and restricted cash recorded on the balance sheet to cash, cash equivalents, and restricted cash in the statements of cash flows (in thousands): Year Ended December 31, 2018 2017 2016 Cash and cash equivalents $ 2,547 $ 148,929 $ 35,687 Restricted cash 148 56,816 15,634 Total cash, cash equivalents, and restricted cash $ 2,695 $ 205,745 $ 51,321

Reportable Segments (Tables)

Reportable Segments (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Reconciliation of NOI to net income available to common stockholders	Information on the Company's segments along with a reconciliation of NOI to net income available to common stockholders is as follows (in thousands): Year ended December 31, 2018 Office Mixed-Use Total Net Operating Income: Atlanta $ 131,564 $ — $ 131,564 Charlotte 62,812 — 62,812 Austin 60,474 — 60,474 Phoenix 36,875 — 36,875 Tampa 30,514 — 30,514 Other 1,581 2,243 3,824 Total Net Operating Income $ 323,820 $ 2,243 $ 326,063 Year ended December 31, 2017 Office Mixed-Use Total Net Operating Income: Atlanta $ 109,706 $ 3,278 $ 112,984 Charlotte 62,708 — 62,708 Austin 58,648 — 58,648 Phoenix 34,074 — 34,074 Tampa 29,426 — 29,426 Orlando 13,029 — 13,029 Other 1,632 705 2,337 Total Net Operating Income $ 309,223 $ 3,983 $ 313,206 Year ended December 31, 2016 Office Mixed-Use Total Net Operating Income: Atlanta $ 98,032 $ 7,411 $ 105,443 Houston 78,590 — 78,590 Austin 29,865 — 29,865 Charlotte 28,418 — 28,418 Tampa 7,130 — 7,130 Phoenix 6,067 — 6,067 Orlando 3,265 — 3,265 Other 1,504 — 1,504 Total Net Operating Income $ 252,871 $ 7,411 $ 260,282 The following reconciles Net Income to Net Operating Income for each of the periods presented (in thousands): Year Ended December 31, 2018 2017 2016 Net income $ 80,765 $ 219,959 $ 80,104 Net operating income from unconsolidated joint ventures 28,888 31,053 28,785 Net operating income from discontinued operations — — 78,591 Fee income (10,089 ) (8,632 ) (8,347 ) Other income (3,270 ) (11,518 ) (1,050 ) Reimbursed expenses 3,782 3,527 3,259 General and administrative expenses 22,040 27,523 25,592 Interest expense 39,430 33,524 26,650 Depreciation and amortization 181,382 196,745 97,948 Acquisition and transaction costs 248 1,661 24,521 Other expenses 556 1,796 5,888 (Gain) loss on extinguishment of debt (8 ) (2,258 ) 5,180 Income from unconsolidated joint ventures (12,224 ) (47,115 ) (10,562 ) Gain on sale of investment properties (5,437 ) (133,059 ) (77,114 ) Income from discontinued operations — — (19,163 ) Net Operating Income $ 326,063 $ 313,206 $ 260,282
Reconciliation of revenue from segments to consolidated	Revenues by reportable segment, including a reconciliation to total revenues on the consolidated statements of operations for years ended December 31, 2018 , 2017 , and 2016 are as follows (in thousands): Year ended December 31, 2018 Office Mixed-Use Total Revenues: Atlanta $ 206,129 $ — $ 206,129 Austin 104,329 — 104,329 Charlotte 92,454 — 92,454 Phoenix 50,696 — 50,696 Tampa 49,812 — 49,812 Other 2,206 3,724 5,930 Total segment revenues 505,626 3,724 509,350 Less: Company's share of rental property revenues from unconsolidated joint ventures (43,773 ) (3,724 ) (47,497 ) Total rental property revenues $ 461,853 $ — $ 461,853 Year ended December 31, 2017 Office Mixed-Use Total Revenues: Atlanta $ 176,190 $ 5,237 $ 181,427 Austin 100,939 — 100,939 Charlotte 91,434 — 91,434 Tampa 47,402 — 47,402 Phoenix 46,186 — 46,186 Orlando 24,862 — 24,862 Other 3,021 999 4,020 Total segment revenues 490,034 6,236 496,270 Less: Company's share of rental property revenues from unconsolidated joint ventures (43,999 ) (6,236 ) (50,235 ) Total rental property revenues $ 446,035 $ — $ 446,035 Year ended December 31, 2016 Office Mixed-Use Total Revenues: Atlanta $ 160,540 $ 13,043 $ 173,583 Houston 136,926 — 136,926 Austin 52,769 — 52,769 Charlotte 39,448 — 39,448 Tampa 10,994 — 10,994 Phoenix 8,902 — 8,902 Orlando 5,896 — 5,896 Other 2,443 — 2,443 Total segment revenues 417,918 13,043 430,961 Less: Company's share of rental property revenues from unconsolidated joint ventures (31,177 ) (13,043 ) (44,220 ) Less: Revenues included in discontinued operations (136,927 ) — (136,927 ) Total rental property revenues $ 249,814 $ — $ 249,814

Description of Business and B_2

Description of Business and Basis of Presentation (Description of Business) (Details) - ft² ft² in Thousands	Oct. 06, 2016	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Percentage of partnership units owned by the Company	98.00%
Company's portfolio of real estate assets - Office space (square feet)		15,000
Company's portfolio of real estate assets - Retail space (square feet)		310

Description of Business and B_3

Description of Business and Basis of Presentation (Recently Issued Accounting Standards) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total rental property revenues	$ 475,212	$ 466,185	$ 259,211
Capitalized indirect leasing costs	3,800
Cumulative effect of change in accounting principle		22,329
Distributions in Excess of Cumulative Net Income
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of change in accounting principle		22,329
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right of use asset	40,000
Lease liability	40,000
Accounting Standards Update 2017-05 | Distributions in Excess of Cumulative Net Income
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of change in accounting principle		22,300
Rental Property
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total rental property revenues	461,853	446,035	249,814
Fee and Other Revenue
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total rental property revenues	$ 13,400	$ 20,200	$ 9,400

Significant Accounting Polici_3

Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Period in which the company capitalizes interest, real estate taxes and certain operating expenses on the unoccupied portion of recently completed properties, beginning with the date it is substantially complete (percent)	90.00%
Period in which the company capitalizes interest, real estate taxes and certain operating expenses on the unoccupied portion of recently completed properties, beginning with the date it is substantially complete (in years)	1 year
Revenue from External Customer [Line Items]
Revenues	$ 475,212	$ 466,185	$ 259,211
Buildings | Minimum
Property, Plant and Equipment [Line Items]
Useful life	30 years
Buildings | Maximum
Property, Plant and Equipment [Line Items]
Useful life	42 years
Furniture, Fixtures and Equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life	3 years
Furniture, Fixtures and Equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life	5 years
Tenants Expenses
Revenue from External Customer [Line Items]
Revenues	$ 79,800	$ 67,200	$ 90,200

Transactions With Parkway Pro_3

Transactions With Parkway Properties, Inc. (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Acquisition and merger costs	$ 188	$ 1,700	$ 24,500
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

Transactions With Parkway Pro_4

Transactions With Parkway Properties, Inc. (Pro Forma Information) (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)$ / shares
Business Combinations [Abstract]
Revenues	$ 732,117
Income from continuing operations	179,625
Net income	174,117
Net income available to common stockholders	$ 166,375
Per share information:
Basic (in usd per share) | $ / shares	$ 0.42
Diluted (in usd per share) | $ / shares	$ 0.41

Transactions With Parkway Pro_5

Transactions With Parkway Properties, Inc. (Discontinued Operations) (Details) - Spin-off $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rental property revenues	$ 136,927
Rental property operating expenses	(58,336)
Other revenues	288
Interest expense	(6,022)
Depreciation and amortization	(47,345)
Other expenses	(6,349)
Income from discontinued operations	19,163
Cash provided by operating activities	42,604
Cash used in investing activities	$ 30,067

Real Estate Transactions (Dispo

Real Estate Transactions (Dispositions) (Details) ft² in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)ft²	Dec. 31, 2017USD ($)ft²
Atlanta, GA | American Cancer Society Center
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet	996
Sales Price | $	$ 166,000
Atlanta, GA | 191 Peachtree
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet		1,225
Sales Price | $		$ 267,500
Atlanta, GA | The Forum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet		220
Sales Price | $		$ 70,000
Atlanta, GA | 100 North Point Center East
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet		129
Sales Price | $		$ 22,000
Orlando, FL | Bank of America Center, One Orlando Centre, --and Citrus Center
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet	1,038
Sales Price | $	$ 208,100
Houston, TX | Post Oak Central
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet		1,280
Houston, TX | Greenway Plaza
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet		4,348
Philadelphia, PA | Two Liberty Place
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet		941
Sales Price | $		$ 219,000
Miami, FL | Lincoln Place
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet		140
Sales Price | $		$ 80,000

Real Estate Transactions (Acqui

Real Estate Transactions (Acquisitions) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)tract
Real Estate [Line Items]
Number of tracts of land acquired	3
Value of land acquired | $	$ 68.4
Midtown Atlanta, Georgia
Real Estate [Line Items]
Number of tracts of land acquired	2
Tempe, Arizona
Real Estate [Line Items]
Number of tracts of land acquired	1

Notes and Accounts Receivable_2

Notes and Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Receivables [Abstract]
Notes receivable	$ 453	$ 465
Tenant and other receivables	13,997	14,490
Allowance for doubtful accounts related to tenant and other receivables	(629)	(535)
Total notes and accounts receivable	$ 13,821	$ 14,420

Investment in Unconsolidated _3

Investment in Unconsolidated Joint Ventures (Summary of Financial Position) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
SUMMARY OF FINANCIAL POSITION
Total Assets	$ 779,204	$ 643,134
Total Debt	342,892	338,590
Total Equity (Deficit)	338,427	267,423
Company's Investment	140,376	78,940
Terminus Office Holdings
SUMMARY OF FINANCIAL POSITION
Total Assets	258,060	261,999
Total Debt	198,732	203,131
Total Equity (Deficit)	50,539	48,033
Company's Investment	48,571	24,898
DC Charlotte Plaza LLLP
SUMMARY OF FINANCIAL POSITION
Total Assets	155,530	53,791
Total Debt	0	0
Total Equity (Deficit)	88,922	42,853
Company's Investment	46,554	22,293
Austin 300 Colorado Project, LP
SUMMARY OF FINANCIAL POSITION
Total Assets	51,180	0
Total Debt	0	0
Total Equity (Deficit)	41,298	0
Company's Investment	22,335	0
Carolina Square Holdings LP
SUMMARY OF FINANCIAL POSITION
Total Assets	106,187	106,580
Total Debt	74,638	64,412
Total Equity (Deficit)	28,844	33,648
Company's Investment	16,840	19,384
HICO Victory Center LP
SUMMARY OF FINANCIAL POSITION
Total Assets	15,069	14,403
Total Debt	0	0
Total Equity (Deficit)	14,801	14,401
Company's Investment	10,003	9,752
Charlotte Gateway Village, LLC
SUMMARY OF FINANCIAL POSITION
Total Assets	112,553	124,691
Total Debt	0	0
Total Equity (Deficit)	109,666	121,386
Company's Investment	8,225	14,568
AMCO 120 WT Holdings, LLC
SUMMARY OF FINANCIAL POSITION
Total Assets	36,680	18,066
Total Debt	0	0
Total Equity (Deficit)	31,372	16,354
Company's Investment	5,538	1,664
CL Realty, L.L.C.
SUMMARY OF FINANCIAL POSITION
Total Assets	4,169	8,287
Total Debt	0	0
Total Equity (Deficit)	4,183	8,127
Company's Investment	2,886	2,980
Temco Associates, LLC
SUMMARY OF FINANCIAL POSITION
Total Assets	1,482	4,441
Total Debt	0	0
Total Equity (Deficit)	1,379	4,337
Company's Investment	919	875
EP II LLC
SUMMARY OF FINANCIAL POSITION
Total Assets	247	277
Total Debt	0	0
Total Equity (Deficit)	165	180
Company's Investment	30	44
EP I LLC
SUMMARY OF FINANCIAL POSITION
Total Assets	461	521
Total Debt	0	0
Total Equity (Deficit)	296	319
Company's Investment	6	25
Wildwood Associates
SUMMARY OF FINANCIAL POSITION
Total Assets	11,157	16,337
Total Debt	0	0
Total Equity (Deficit)	11,108	16,297
Company's Investment	(460)	(1,151)
Crawford Long - CPI, LLC
SUMMARY OF FINANCIAL POSITION
Total Assets	26,429	27,362
Total Debt	69,522	71,047
Total Equity (Deficit)	(44,146)	(44,815)
Company's Investment	(21,071)	(21,323)
Other
SUMMARY OF FINANCIAL POSITION
Total Assets	0	6,379
Total Debt	0	0
Total Equity (Deficit)	0	6,303
Company's Investment	$ 0	$ 4,931

Investment in Unconsolidated _4

Investment in Unconsolidated Joint Ventures (Summary of Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SUMMARY OF OPERATIONS
Total Revenues	$ 95,515	$ 110,664	$ 116,855
Net Income (Loss)	15,352	77,944	27,398
Company's Share of Net Income (Loss)	12,224	47,115	10,562
Charlotte Gateway Village, LLC
SUMMARY OF OPERATIONS
Total Revenues	26,932	26,465	34,156
Net Income (Loss)	10,285	9,528	14,536
Company's Share of Net Income (Loss)	5,143	4,764	2,194
Terminus Office Holdings
SUMMARY OF OPERATIONS
Total Revenues	44,429	43,959	42,386
Net Income (Loss)	5,506	6,307	4,608
Company's Share of Net Income (Loss)	2,755	3,153	2,303
Wildwood Associates
SUMMARY OF OPERATIONS
Total Revenues	0	0	0
Net Income (Loss)	(1,140)	(116)	(140)
Company's Share of Net Income (Loss)	2,723	(58)	(70)
Crawford Long - CPI, LLC
SUMMARY OF OPERATIONS
Total Revenues	12,383	12,079	12,113
Net Income (Loss)	3,446	3,171	2,743
Company's Share of Net Income (Loss)	1,641	1,572	1,372
HICO Victory Center LP
SUMMARY OF OPERATIONS
Total Revenues	400	429	383
Net Income (Loss)	400	431	376
Company's Share of Net Income (Loss)	219	225	187
Austin 300 Colorado Project, LP
SUMMARY OF OPERATIONS
Total Revenues	487	0	0
Net Income (Loss)	220	0	0
Company's Share of Net Income (Loss)	110	0	0
Temco Associates, LLC
SUMMARY OF OPERATIONS
Total Revenues	176	192	1,343
Net Income (Loss)	(2,965)	123	440
Company's Share of Net Income (Loss)	43	46	502
Courvoisier Centre JV, LLC
SUMMARY OF OPERATIONS
Total Revenues	0	15,106	3,968
Net Income (Loss)	0	(1,750)	(489)
Company's Share of Net Income (Loss)	5	521	(93)
DC Charlotte Plaza LLLP
SUMMARY OF OPERATIONS
Total Revenues	0	2	47
Net Income (Loss)	0	2	45
Company's Share of Net Income (Loss)	(1)	1	24
EP II LLC
SUMMARY OF OPERATIONS
Total Revenues	5	2,644	5,376
Net Income (Loss)	(16)	13,008	(1,187)
Company's Share of Net Income (Loss)	(14)	9,756	(878)
EP I LLC
SUMMARY OF OPERATIONS
Total Revenues	17	4,123	12,239
Net Income (Loss)	(23)	45,115	2,294
Company's Share of Net Income (Loss)	(20)	28,667	1,684
CL Realty, L.L.C.
SUMMARY OF OPERATIONS
Total Revenues	0	2,964	567
Net Income (Loss)	(161)	2,668	237
Company's Share of Net Income (Loss)	(94)	536	128
Carolina Square Holdings LP
SUMMARY OF OPERATIONS
Total Revenues	10,686	2,701	58
Net Income (Loss)	(169)	(532)	9
Company's Share of Net Income (Loss)	(275)	522	0
AMCO 120 WT Holdings, LLC
SUMMARY OF OPERATIONS
Total Revenues	0	0	0
Net Income (Loss)	38	58	0
Company's Share of Net Income (Loss)	0	0	0
Other
SUMMARY OF OPERATIONS
Total Revenues	0	0	4,219
Net Income (Loss)	(69)	(69)	3,926
Company's Share of Net Income (Loss)	$ (11)	$ (2,590)	$ 3,209

Investment in Unconsolidated _5

Investment in Unconsolidated Joint Ventures (Terminus Office Holdings LLC) (Details) - Terminus Office Holdings $ in Millions	Dec. 31, 2018USD ($)propertydebt_instrument
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%
Cash balance of joint venture	$ 7.5
Secured Mortgage Note Payable
Schedule of Equity Method Investments [Line Items]
Number of non-recourse mortgage loans | debt_instrument	2
Principal amount	$ 198.7
Weighted average interest rate	4.68%
Office Buildings
Schedule of Equity Method Investments [Line Items]
Number of properties owned | property	2
JPM
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%

Investment in Unconsolidated _6

Investment in Unconsolidated Joint Ventures (DC Charlotte Plaza LLLP) (Details) - DC Charlotte Plaza LLLP ft² in Thousands, $ in Thousands	Dec. 31, 2018USD ($)ft²
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%
Square footage of real estate property (square feet) | ft²	282
Maximum required capital contribution	$ 46,000
Cash balance of joint venture	$ 842
DFA
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%

Investment in Unconsolidated _7

Investment in Unconsolidated Joint Ventures (Austin 300 Colorado Project, LP) (Details) - Austin 300 Colorado Project, LP ft² in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)ft²
Schedule of Equity Method Investments [Line Items]
Square footage of real estate property (square feet) | ft²	358
Ownership interest percentage	50.00%
Cash contributions to joint venture	$ 6
Cash balance of joint venture	$ 1.7
3CB
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	34.50%
3CRR
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	15.50%

Investment in Unconsolidated _8

Investment in Unconsolidated Joint Ventures (Carolina Square Holdings LP) (Details) ft² in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)ft²extensionapartment_unit	Dec. 31, 2017USD ($)
Schedule of Equity Method Investments [Line Items]
Aggregate outstanding indebtedness	$ 342,892	$ 338,590
Carolina Square Holdings LP
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%
Number of apartment units | apartment_unit	246
Aggregate outstanding indebtedness	$ 74,638	$ 64,412
Maximum percentage guaranteed under construction loan	12.50%
Cash balance of joint venture	$ 3,800
Carolina Square Holdings LP | LIBOR
Schedule of Equity Method Investments [Line Items]
Basis spread on variable rate (percent)	1.90%
Number of loan extensions | extension	2
Extension period	1 year
Carolina Square Holdings LP | Office Space
Schedule of Equity Method Investments [Line Items]
Square footage of real estate property (square feet) | ft²	158
Carolina Square Holdings LP | Retail Space
Schedule of Equity Method Investments [Line Items]
Square footage of real estate property (square feet) | ft²	44
Carolina Square Holdings LP | Northwood Ravin
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%

Investment in Unconsolidated _9

Investment in Unconsolidated Joint Ventures (HICO Victory Center LP) (Details) - HICO Victory Center LP $ in Thousands	Dec. 31, 2018USD ($)
Schedule of Equity Method Investments [Line Items]
Land funding requirement (percent)	75.00%
Cash balance of joint venture	$ 565
Minimum
Schedule of Equity Method Investments [Line Items]
Future ownership percentage of partner in joint venture	90.00%
Hines
Schedule of Equity Method Investments [Line Items]
Land funding requirement (percent)	25.00%
Hines | Maximum
Schedule of Equity Method Investments [Line Items]
Future ownership percentage of partner in joint venture	10.00%

Investment in Unconsolidated_10

Investment in Unconsolidated Joint Ventures (Charlotte Gateway Village, LLC) (Details) - Charlotte Gateway Village, LLC ft² in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)ft²	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%
Square footage of real estate property (square feet) | ft²	1.1
Compounded rate of return received by Company (percent)		11.46%
Percentage of Company's income (loss) received in final step of distribution	0.5
Allocation of net income and cash flows, percentage	50.00%
Maximum internal rate of return to be achieved	17.00%
Allocation of proceeds from capital transactions, percentage, third priority	20.00%
Cash balance of joint venture | $	$ 3.2
BOA
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%
Percentage of Company's income (loss) received in final step of distribution		0.5
Allocation of net income and cash flows, percentage	50.00%
Allocation of proceeds from capital transactions, percentage, third priority	80.00%

Investment in Unconsolidated_11

Investment in Unconsolidated Joint Ventures (CL Realty, L.L.C.) (Details) - CL Realty, L.L.C. $ in Thousands	Dec. 31, 2018USD ($)
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%
Cash balance of joint venture	$ 379
Forestar
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%

Investment in Unconsolidated_12

Investment in Unconsolidated Joint Ventures (AMCO 120 WT Holdings, LLC) (Details) - AMCO 120 WT Holdings, LLC ft² in Thousands, $ in Thousands	Dec. 31, 2018USD ($)ft²apartment_unit
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	20.00%
Number of apartment units | apartment_unit	330
Cash balance of joint venture | $	$ 1
Office Space
Schedule of Equity Method Investments [Line Items]
Square footage of real estate property (square feet)	33
Retail Space
Schedule of Equity Method Investments [Line Items]
Square footage of real estate property (square feet)	19
AMLI Residential
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	80.00%

Investment in Unconsolidated_13

Investment in Unconsolidated Joint Ventures (Temco Associates, LLC) (Details) - Temco Associates, LLC $ in Thousands	Dec. 31, 2018USD ($)
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%
Cash balance of joint venture	$ 500
Forestar
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%

Investment in Unconsolidated_14

Investment in Unconsolidated Joint Ventures (EP I LLC and EP II LLC) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Combined gross sales price	$ 372	$ 370,944	$ 622,643
Distribution received	16,756	11,065	14,184
Gain recorded in income from unconsolidated joint ventures	$ 12,224	$ 47,115	$ 10,562
EP I, LLC and EP II, LLC
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	75.00%
Combined gross sales price	$ 199,000
Distribution received	70,000
Gain recorded in income from unconsolidated joint ventures	37,900
Cash balance of joint venture	$ 695
EP I, LLC and EP II, LLC | Gables
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	25.00%

Investment in Unconsolidated_15

Investment in Unconsolidated Joint Ventures (Courvoisier Centre JV, LLC (Details) ft² in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)ft²	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Schedule of Equity Method Investments [Line Items]
Proceeds from sale of interest in unconsolidated joint venture	$ 0	$ 12,514	$ 0
Income from unconsolidated joint ventures	$ 12,224	$ 47,115	$ 10,562
Courvoisier Centre JV, LLC
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	20.00%
Square footage of real estate property (square feet) | ft²	343
Proceeds from sale of interest in unconsolidated joint venture	$ 12,600
Income from unconsolidated joint ventures	716
Value of interest in the property before deduction for existing mortgage debt	$ 33,900
Courvoisier Centre JV, LLC | Spanish Key LLC
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	80.00%

Investment in Unconsolidated_16

Investment in Unconsolidated Joint Ventures (Wildwood Associates) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Company's investment balance	$ 140,376	$ 78,940
Income from unconsolidated joint ventures	$ 12,224	47,115	$ 10,562
Wildwood Associates
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%
Company's investment balance	$ (460)	$ (1,151)
Change in balance of unconsolidated joint venture	749
Income from unconsolidated joint ventures	2,300
Cash balance of joint venture	$ 68
Wildwood Associates | IBM
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%

Investment in Unconsolidated_17

Investment in Unconsolidated Joint Ventures (Crawford Long—CPI, LLC) (Details) ft² in Thousands, $ in Thousands	Dec. 31, 2018USD ($)ft²	Dec. 31, 2017USD ($)
Schedule of Equity Method Investments [Line Items]
Aggregate outstanding indebtedness	$ 342,892	$ 338,590
Crawford Long - CPI, LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%
Square footage of real estate property (square feet) | ft²	358
Aggregate outstanding indebtedness	$ 69,522	$ 71,047
Cash balance of joint venture	$ 2,100
Crawford Long - CPI, LLC | Secured Mortgage Note Payable
Schedule of Equity Method Investments [Line Items]
Interest rate on mortgage loan (percent)	3.50%
Crawford Long - CPI, LLC | Emory University
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%

Investment in Unconsolidated_18

Investment in Unconsolidated Joint Ventures (Other Data) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity Method Investments and Joint Ventures [Abstract]
Aggregate outstanding indebtedness to third parties	$ 342,892	$ 338,590
Fees earned from unconsolidated joint ventures	$ 9,300	$ 7,200	$ 7,400

Intangible Assets (Intangible A

Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 1,674	$ 1,674
Total intangible assets	145,883	186,206
In-place leases
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	105,964	139,548
Accumulated amortization	125,130	91,548
Above-market leases
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	20,453	26,917
Accumulated amortization	19,502	13,038
Below-market ground leases
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	17,792	18,067
Accumulated amortization	$ 621	$ 345

Intangible Assets (Narrative) (

Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Net amortization expense of intangible assets and liabilities	$ 27	$ 42.4	$ 24

Intangible Assets (Intangibles

Intangible Assets (Intangibles - Future Amortization) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Future Amortization of Intangible Assets:
Weighted average remaining lease term	10 years
2,019	$ 20,054
2,020	15,374
2,021	11,217
2,022	7,646
2,023	5,939
Thereafter	27,043
Finite-lived intangibles, net	87,273
Below Market Rents
Future Amortization of Intangible Liabilities:
2,019	(11,645)
2,020	(10,519)
2,021	(8,753)
2,022	(6,185)
2,023	(4,844)
Thereafter	(13,272)
Finite-lived intangible liabilities, net	$ (55,218)
Weighted average remaining lease term	6 years
Above Market Ground Lease
Future Amortization of Intangible Liabilities:
2,019	$ (46)
2,020	(46)
2,021	(46)
2,022	(46)
2,023	(46)
Thereafter	(1,488)
Finite-lived intangible liabilities, net	$ (1,718)
Weighted average remaining lease term	37 years
Below Market Ground Lease
Future Amortization of Intangible Assets:
2,019	$ 276
2,020	276
2,021	276
2,022	276
2,023	276
Thereafter	16,412
Finite-lived intangible assets, net	$ 17,792	$ 18,067
Weighted average remaining lease term	65 years
Above Market Rents
Future Amortization of Intangible Assets:
2,019	$ 5,308
2,020	4,433
2,021	3,374
2,022	2,292
2,023	1,710
Thereafter	3,336
Finite-lived intangible assets, net	$ 20,453	26,917
Weighted average remaining lease term	6 years
In Place Leases
Future Amortization of Intangible Assets:
2,019	$ 26,161
2,020	21,230
2,021	16,366
2,022	11,309
2,023	8,843
Thereafter	22,055
Finite-lived intangible assets, net	$ 105,964	$ 139,548
Weighted average remaining lease term	6 years

Other Assets (Details)

Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Furniture, fixtures and equipment, leasehold improvements, and other deferred costs, net of accumulated depreciation of $25,193 and $21,925 in 2018 and 2017, respectively	$ 14,942	$ 12,241
Prepaid expenses and other assets	5,087	3,902
Lease inducements, net of accumulated amortization of $1,545 and $978 in 2018 and 2017, respectively	4,961	3,126
Line of credit deferred financing costs, net of accumulated amortization of $1,451 and $3,119 in 2018 and 2017, respectively	5,844	1,213
Predevelopment costs and earnest money	8,249	372
Total other assets	39,083	20,854
Furniture, fixtures and equipment, leasehold improvements, and other deferred costs, accumulated depreciation	25,193	21,925
Lease inducements, accumulated amortization	1,545	978
Line of credit deferred financing costs, accumulated amortization	$ 1,451	$ 3,119

Notes Payable (Terms of Notes P

Notes Payable (Terms of Notes Payable) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total Notes Payable, Gross	$ 1,067,362	$ 1,098,764
Unamortized premium, net	0	219
Unamortized loan costs	(4,792)	(5,755)
Total Notes Payable	$ 1,062,570	1,093,228
Weighted average maturity period of notes payable outstanding	5 years 8 months 12 days
Term Loan, unsecured
Debt Instrument [Line Items]
Interest Rate (percent)	3.70%
Total Notes Payable, Gross	$ 250,000	250,000
Senior Notes, unsecured | 3.91% Senior Unsecured Notes
Debt Instrument [Line Items]
Interest Rate (percent)	3.91%
Total Notes Payable, Gross	$ 250,000	250,000
Senior Notes, unsecured | 4.09% Senior Unsecured Notes
Debt Instrument [Line Items]
Interest Rate (percent)	4.09%
Total Notes Payable, Gross	$ 100,000	100,000
Mortgage Debt
Debt Instrument [Line Items]
Total Notes Payable	$ 467,300
Mortgage Debt | Fifth Third Center
Debt Instrument [Line Items]
Interest Rate (percent)	3.37%
Total Notes Payable, Gross	$ 143,497	146,557
Mortgage Debt | Colorado Tower
Debt Instrument [Line Items]
Interest Rate (percent)	3.45%
Total Notes Payable, Gross	$ 119,427	120,000
Mortgage Debt | Promenade
Debt Instrument [Line Items]
Interest Rate (percent)	4.27%
Total Notes Payable, Gross	$ 99,238	102,355
Mortgage Debt | 816 Congress
Debt Instrument [Line Items]
Interest Rate (percent)	3.75%
Total Notes Payable, Gross	$ 81,676	83,304
Mortgage Debt | Meridian Mark Plaza
Debt Instrument [Line Items]
Interest Rate (percent)	6.00%
Total Notes Payable, Gross	$ 23,524	$ 24,038
Mortgage Debt | The Pointe
Debt Instrument [Line Items]
Interest Rate (percent)		4.01%
Total Notes Payable, Gross	0	$ 22,510
Credit Facility, unsecured
Debt Instrument [Line Items]
Interest Rate (percent)		3.55%
Total Notes Payable, Gross	$ 0	$ 0

Notes Payable (Credit Facility)

Notes Payable (Credit Facility) (Details) - Credit Facility	Jan. 03, 2018USD ($)	Jan. 02, 2018USD ($)	Sep. 30, 2018USD ($)	Dec. 31, 2017
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 500,000,000
Minimum shareholders' equity		$ 1,000,000,000
Minimum
Line of Credit Facility [Line Items]
Unencumbered interest coverage ratio		2		2
Fixed charge coverage ratio		1.50
Annual facility fee rate (percent)		0.15%
Maximum
Line of Credit Facility [Line Items]
Leverage ratio (percent)		60.00%
Annual facility fee rate (percent)		0.30%
LIBOR | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)	1.05%	1.10%
LIBOR | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)	1.45%	1.45%
Federal Funds Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)		0.50%
One-month LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)		1.00%
Base Rate | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)	0.10%	0.10%
Base Rate | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)	0.45%	0.45%
New Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 1,000,000,000
Additional borrowing capacity	$ 500,000,000
Line of credit outstanding			$ 0
Remaining borrowing capacity			998,000,000
Current borrowing capacity			1,000,000,000
Letters of credit outstanding			$ 2,000,000
New Credit Facility | Minimum
Line of Credit Facility [Line Items]
Unencumbered interest coverage ratio	1.75
New Credit Facility | LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)			1.05%
New Credit Facility | Federal Funds Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)	0.50%
New Credit Facility | One-month LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)	1.00%

Notes Payable (Term Loan) (Deta

Notes Payable (Term Loan) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Unsecured term loan	$ 1,067,362	$ 1,098,764
Term Loan
Debt Instrument [Line Items]
Unsecured term loan	$ 250,000	$ 250,000
Term Loan | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1.20%
Term Loan | LIBOR | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1.20%
Term Loan | LIBOR | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1.70%
Term Loan | Federal Funds Rate
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	0.50%
Term Loan | One-month LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1.00%
Term Loan | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	0.00%
Term Loan | Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	0.75%

Notes Payable (Unsecured Senior

Notes Payable (Unsecured Senior Notes) (Details) - Senior Notes, unsecured	12 Months Ended
	Dec. 31, 2017USD ($)tranche
Debt Instrument [Line Items]
Debt amount	$ 350,000,000
Number of tranches | tranche	2
Minimum shareholders' equity	$ 1,900,000,000
Minimum
Debt Instrument [Line Items]
Unencumbered interest coverage ratio	2
Fixed charge coverage ratio	1.50
Maximum
Debt Instrument [Line Items]
Leverage ratio (percent)	60.00%
10-year Note with Interest Rate of 4.09%
Debt Instrument [Line Items]
Debt amount	$ 100,000,000
Debt term	10 years
Interest rate (percent)	4.09%
8-year Note with Interest Rate of 3.91%
Debt Instrument [Line Items]
Debt amount	$ 250,000,000
Debt term	8 years
Interest rate (percent)	3.91%

Notes Payable (Mortgage Loan In

Notes Payable (Mortgage Loan Information) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)debt_instrument	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt	$ 8	$ 2,258	$ (5,180)
Outstanding amount	1,062,570	1,093,228
Mortgage Debt
Debt Instrument [Line Items]
Outstanding amount	$ 467,300
Number of non-recourse mortgage loans | debt_instrument	5
Mortgage Debt
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt		2,600
Assets pledged as security	$ 505,300
Mortgage Debt | The Pointe
Debt Instrument [Line Items]
Amount of debt paid	$ 22,200
Mortgage Debt | One Eleven Congress
Debt Instrument [Line Items]
Amount of debt paid		128,000
Mortgage Debt | San Jacinto Center
Debt Instrument [Line Items]
Amount of debt paid		101,000
Mortgage Debt | Two Buckhead Plaza
Debt Instrument [Line Items]
Amount of debt paid		52,000
Mortgage Debt | 3344 Peachtree
Debt Instrument [Line Items]
Amount of debt paid		77,900
Mortgage Debt | ACS Center
Debt Instrument [Line Items]
Amount of debt paid		127,000
Gain (loss) on extinguishment of debt		$ (376)

Notes Payable (Other Debt Infor

Notes Payable (Other Debt Information) (Details) $ in Billions	Dec. 31, 2018USD ($)
Debt Disclosure [Abstract]
Notes payable, fair value	$ 1.1

Notes Payable (Interest Expense

Notes Payable (Interest Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
Total interest incurred	$ 44,332	$ 42,767	$ 31,347
Interest capitalized	(4,902)	(9,243)	(4,697)
Total interest expense	$ 39,430	$ 33,524	$ 26,650

Notes Payable (Debt Maturities)

Notes Payable (Debt Maturities) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
2,019	$ 10,997
2,020	33,825
2,021	261,258
2,022	97,042
2,023	8,274
Thereafter	655,966
Total Notes Payable	$ 1,067,362	$ 1,098,764

Commitments and Contingencies_2

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Outstanding letters of credit and performance bonds	$ 2,600
Future obligations under leases				$ 100,200
Lease operating expenses	3,600	$ 3,300	$ 2,400
Other Commitments [Line Items]
Operating leases	$ 205,643
Weighted average remaining term (in years)	2 years
Ground Leases
Other Commitments [Line Items]
Weighted average remaining term (in years)	76 years

Commitments and Contingencies_3

Commitments and Contingencies (Lease Commitments) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
2,019	$ 2,582
2,020	2,484
2,021	2,461
2,022	2,396
2,023	2,374
Thereafter	193,346
Total	$ 205,643

Stockholders' Equity (Narrative

Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Gross proceeds from issuance of common stock		$ 212,900
Net proceeds from issuance of stock		211,774
Aggregate value of units redeemed		$ 0	$ 0
Preferred stock, par value (in usd per share)	$ 1	$ 1	$ 1
Percentage of restriction on ownership (more than)	3.90%
Common Stock
Class of Stock [Line Items]
Number of shares issued during period		25,000,000
Stock issuance costs		$ 1,100
Net proceeds from issuance of stock		$ 211,800
Number of units redeemed in exchange for common stock (in shares)		1,203,286
Aggregate value of units redeemed		$ 10,100
Preferred Stock
Class of Stock [Line Items]
Number of shares issued in merger			6,900,000

Stockholders' Equity (Distribut

Stockholders' Equity (Distribution of REIT Taxable Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity [Abstract]
Common and preferred dividends	$ 107,167	$ 99,138	$ 1,077,179
Dividends treated as taxable compensation	(150)	(129)	(92)
Portion of dividends declared in current year, and paid in current year, which was applied to the prior year distribution requirements	0	0	0
Portion of dividends declared in subsequent year, and paid in subsequent year, which apply to current year distribution requirements	0	0	0
Dividends in excess of current year REIT distribution requirements	0	0	(827,005)
Dividends applied to meet current year REIT distribution requirements	$ 107,017	$ 99,009	$ 250,082

Stockholders' Equity (Tax Statu

Stockholders' Equity (Tax Status of Distributions) (Details) - Common Stock - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Total Distributions Per Share (in usd per share)	$ 0.255000	$ 0.240000	$ 2.853075
Unrecaptured Section 1250 Gain (in usd per share)	0	0.070522	0.100934
Nondividend Distributions (in usd per share)	0	0	2.190636
AMT Adjustment (in usd per share)	0	0.017756	0
Ordinary Dividends
Class of Stock [Line Items]
Total Distributions Per Share (in usd per share)	0.251396	0.093312	0.079661
Long-Term Capital Gain
Class of Stock [Line Items]
Total Distributions Per Share (in usd per share)	$ 0.003604	$ 0.146688	$ 0.582778

Future Minimum Rents (Details)

Future Minimum Rents (Details) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2,019	$ 328,607
2,020	330,477
2,021	314,410
2,022	280,959
2,023	256,233
Thereafter	1,115,490
Future minimum rents to be received	$ 2,626,176

Stock-Based Compensation (Narra

Stock-Based Compensation (Narrative) (Details)	Dec. 31, 2018shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Shares authorized under stock option plan	2,466,153

Stock-Based Compensation (Stock

Stock-Based Compensation (Stock Options Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding (in shares)	458,000	929,000	2,262,000	1,763,000
Grants in period (in shares)			1,222,000
Weighted average fair value of options granted (in usd per share)			$ 11.78
Adjustments to additional paid-in capital for fair value of options granted			$ 565
Value of stock issued during period resulting from exercise of stock options	$ 945
Fair value of options exercisable	$ 851
Weighted average contractual life of outstanding options (in years)	1 year 1 month
Weighted average contractual life of exercisable options (in years)		2 years 3 months
Parkway Key Executives
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)			672,375
Weighted average fair value of options granted (in usd per share)			$ 0.84
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding (in shares)	458,154
Term life of stock options (years)	10 years
Vesting period	4 years
Number of stock issued during period (in shares)	47,309
Stock Options | Parkway Key Executives
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			10 years

Stock-Based Compensation (Fair

Stock-Based Compensation (Fair Value Assumptions) (Details) - Stock Options	12 Months Ended
	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	1.37%
Assumed dividend yield	3.60%
Assumed lives of option awards (in years)	6 years 4 months 24 days
Assumed volatility	23.23%

Stock-Based Compensation (Sto_2

Stock-Based Compensation (Stock Option Activity) (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Number of Options
Outstanding at beginning of period (in shares)	929	2,262	1,763
Granted as a result of the Merger and Spin-Off (in shares)			1,222
Exercised (in shares)	(457)	(577)	(2)
Forfeited/Expired (in shares)	(14)	(756)	(721)
Outstanding at end of period (in shares)	458	929	2,262
Options Exercisable at end of period (in shares)	458
Weighted Average Exercise Price Per Option
Outstanding at beginning of period (in usd per share)	$ 6.59	$ 10.82	$ 22.05
Granted as a result of the Merger and Spin-Off (in usd per share)			11.78
Exercised (in usd per share)	6.60	7.51	8.35
Forfeited/Expired (in usd per share)	18.72	18.47	27.24
Outstanding at end of period (in usd per share)	6	$ 6.59	$ 10.82
Options Exercisable at end of period (in usd per share)	$ 6

Stock-Based Compensation (Restr

Stock-Based Compensation (Restricted Stock Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)awardshares	Dec. 31, 2017USD ($)awardshares	Dec. 31, 2016USD ($)awardshares
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (in shares) | shares	315,000	308,000	235,000
Compensation expense, restricted stock | $	$ 2,300	$ 2,000	$ 1,600
Unrecognized compensation cost | $	$ 2,800
Unrecognized compensation cost, period for recognition (in years)	1 year 8 months
Fair value of restricted stock that vested | $	$ 2,300
Restricted Stock | Independent Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (in shares) | shares	118,555	120,878	72,771
Restricted Stock | Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (in shares) | shares	315,199	308,289	234,965
Vesting period	3 years
Performance-based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (in shares) | shares	450,000	399,000	312,000
Types of performance-based RSUs | award		2,000	2,000
Targeted number of units outstanding (in shares) | shares	443,127	379,381	379,582
Performance-based RSUs | Key Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Types of performance-based RSUs | award	2
Payout range minimum (as a percent)	0.00%
Payout range maximum (as a percent)	200.00%
Time-vested RSUs | Key Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (in shares) | shares	17,836	264,723	28,938
Vesting period	3 years	3 years
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, period for recognition (in years)	1 year 1 month
Estimate of future expense for all types of RSUs outstanding | $	$ 3,600
Total cash paid for vesting and dividend payments | $	3,700
Recognized compensation expense related to RSUs for employees and directors, before capitalization or income tax benefit, if any | $	$ 4,600	$ 7,000	$ 6,400

Stock-Based Compensation (Res_2

Stock-Based Compensation (Restricted Stock Activity) (Details) - Restricted Stock - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Number of Shares
Outstanding at beginning of period (in shares)	557	471	293
Granted (in shares)	315	308	235
Vested (in shares)	(259)	(214)	(141)
Forfeited (in shares)	(22)	(8)	(30)
Outstanding at end of period (in shares)	591	557	471
Weighted-Average Grant Date Fair Value
Outstanding at beginning of period (in usd per share)	$ 7.93	$ 7.57	$ 10.65
Granted (in usd per share)	8.51	8.63	8.62
Vested (in usd per share)	7.83	7.50	8.54
Forfeited (in usd per share)	8.22	6.53	9.77
Outstanding at end of period (in usd per share)	$ 8.27	$ 7.93	$ 7.57
At Spin-off
Number of Shares
Granted (in shares)			114
Weighted-Average Grant Date Fair Value
Granted (in usd per share)			$ 7.57

Stock-Based Compensation (Perfo

Stock-Based Compensation (Performance-Based RSU Activity) (Details) - Performance-based RSUs - shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Summary of all performance-based RSU activity
Outstanding at beginning of period (in shares)	1,084	1,273	843
Granted (in shares)	450	399	312
Vested (in shares)	(296)	(576)	(160)
Forfeited (in shares)	(36)	(12)	(30)
Outstanding at end of period (in shares)	1,202	1,084	1,273
At Spin-off
Summary of all performance-based RSU activity
Granted (in shares)			308

Retirement Savings Plan (Detail

Retirement Savings Plan (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Contribution Plan Disclosure [Line Items]
Employer contribution matching percentage		3.00%
Employee vesting period in the retirement saving plan		3 years
Company defined contribution plan		$ 647	$ 764	$ 682
Subsequent Event
Defined Contribution Plan Disclosure [Line Items]
Employer contribution matching percentage	3.00%
Employee vesting period in the retirement saving plan	2 years

Income Taxes (Statutory Federal

Income Taxes (Statutory Federal Income Tax Rate) (Details) - CTRS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Amount
Federal income tax benefit (expense)	$ 143	$ 47	$ (1,159)
State income tax benefit (expense), net of federal income tax effect	27	5	(132)
Change in deferred tax assets as a result of change in tax law	0	(340)	0
Valuation allowance	(174)	283	1,282
Other	4	5	9
Benefit applicable to income (loss) from continuing operations	$ 0	$ 0	$ 0
Rate
Federal income tax benefit (expense) (percent)	21.00%	35.00%	35.00%
State income tax benefit (expense), net of federal income tax effect (percent)	4.00%	4.00%	4.00%
Change in deferred tax assets as a result of change in tax law (percent)	0.00%	(254.00%)	0.00%
Valuation allowance (percent)	(26.00%)	211.00%	(39.00%)
Other (percent)	1.00%	4.00%	0.00%
Benefit applicable to income (loss) from continuing operations (percent)	0.00%	0.00%	0.00%

Income Taxes (Tax Effect of Sig

Income Taxes (Tax Effect of Significant Temporary Differences) (Details) - CTRS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Income from unconsolidated joint ventures	$ 18	$ 19
Federal and state tax carryforwards	763	590
Other	2	0
Total deferred tax assets	783	609
Valuation allowance	(783)	(609)
Net deferred tax asset	$ 0	$ 0

Earnings Per Share (Computation

Earnings Per Share (Computation of Basic and Diluted Earnings per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Numerator:
Income from continuing operations	$ 80,765	$ 219,959	$ 60,941
Income from continuing operations available for common stockholders	79,164	216,275	59,946
Income from discontinued operations	0	0	19,163
Net income available for common stockholders	$ 79,164	$ 216,275	$ 79,109
Denominator:
Weighted average common shares - basic (in shares)	420,305	415,610	253,895
Income from continuing operations available for common stockholders (in usd per share)	$ 0.19	$ 0.52	$ 0.24
Income from discontinued operations available for common stockholders (in usd per share)	0	0	0.07
Net income available to common stockholders (in usd per share)	$ 0.19	$ 0.52	$ 0.31
Numerator:
Income from continuing operations	$ 80,765	$ 219,959	$ 60,941
Income from continuing operations available for common stockholders	80,509	219,956	60,730
Income from discontinued operations	0	0	19,163
Net income available for common stockholders before net income attributable to noncontrolling interests in CPLP	$ 80,509	$ 219,956	$ 79,893
Denominator:
Weighted average common shares - basic (in shares)	420,305	415,610	253,895
Add:
Potential dilutive common shares - stock options (in shares)	194	312	178
Weighted average units of CPLP convertible into common shares (in shares)	6,974	7,375	1,950
Weighted average common shares - diluted (in shares)	427,473	423,297	256,023
Income from continuing operations available for common stockholders (in usd per share)	$ 0.19	$ 0.52	$ 0.24
Income from discontinued operations available for common stockholders (in usd per share)	0	0	0.07
Net income available to common stockholders (in usd per share)	$ 0.19	$ 0.52	$ 0.31
CPLP
Numerator:
Net income attributable to other noncontrolling interests from continuing operations	$ 1,345	$ (3,681)	$ (784)
Numerator:
Net income attributable to other noncontrolling interests from continuing operations	1,345	(3,681)	(784)
Other Noncontrolling Interests
Numerator:
Net income attributable to other noncontrolling interests from continuing operations	256	(3)	(211)
Numerator:
Net income attributable to other noncontrolling interests from continuing operations	$ 256	$ (3)	$ (211)

Earnings Per Share (Narrative)

Earnings Per Share (Narrative) (Details) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive stock options (in shares)	0	24,000	762,000

Consolidated Statements of Ca_4

Consolidated Statements of Cash Flows - Supplemental Information (Supplemental Cash Flows Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Supplemental Cash Flow Elements [Abstract]
Interest paid, net of amounts capitalized	$ 43,166	$ 30,572	$ 32,215
Income taxes paid	0	0	0
Non-Cash Transactions:
Transfer from projects under development to operating properties	325,490	58,928	0
Common stock dividends declared and accrued	27,326	25,202	0
Cumulative effect of change in accounting principle	22,329	0	0
Transfer from investment in unconsolidated joint ventures to projects under development	7,025	0	5,880
Change in accrued property acquisition, development, and tenant asset expenditures	(18,104)	5,965	7,918
Transfer from investment in unconsolidated joint venture to operating properties	0	68,498	0
Non-cash assets and liabilities assumed in Merger	0	0	1,856,255
Non-cash assets and liabilities distributed in Spin-Off	0	0	(948,306)
Mortgage note payable legally defeased	0	0	20,170
Transfer from land held to projects under development	$ 0	$ 0	$ 8,099

Consolidated Statements of Ca_5

Consolidated Statements of Cash Flows - Supplemental Information (Reconciliation of Cash, Cash Equivalents and Restricted Cash) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents	$ 2,547	$ 148,929	$ 35,687
Restricted cash	148	56,816	15,634
Total cash, cash equivalents, and restricted cash	$ 2,695	$ 205,745	$ 51,321	$ 6,307

Reportable Segments (Segment Ne

Reportable Segments (Segment Net Operating Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total Net Operating Income	$ 326,063	$ 313,206	$ 260,282
Atlanta
Segment Reporting Information [Line Items]
Total Net Operating Income	131,564	112,984	105,443
Houston
Segment Reporting Information [Line Items]
Total Net Operating Income			78,590
Charlotte
Segment Reporting Information [Line Items]
Total Net Operating Income	62,812	62,708	28,418
Austin
Segment Reporting Information [Line Items]
Total Net Operating Income	60,474	58,648	29,865
Phoenix
Segment Reporting Information [Line Items]
Total Net Operating Income	36,875	34,074	6,067
Tampa
Segment Reporting Information [Line Items]
Total Net Operating Income	30,514	29,426	7,130
Orlando
Segment Reporting Information [Line Items]
Total Net Operating Income		13,029	3,265
Other
Segment Reporting Information [Line Items]
Total Net Operating Income	3,824	2,337	1,504
Office
Segment Reporting Information [Line Items]
Total Net Operating Income	323,820	309,223	252,871
Office | Atlanta
Segment Reporting Information [Line Items]
Total Net Operating Income	131,564	109,706	98,032
Office | Houston
Segment Reporting Information [Line Items]
Total Net Operating Income			78,590
Office | Charlotte
Segment Reporting Information [Line Items]
Total Net Operating Income	62,812	62,708	28,418
Office | Austin
Segment Reporting Information [Line Items]
Total Net Operating Income	60,474	58,648	29,865
Office | Phoenix
Segment Reporting Information [Line Items]
Total Net Operating Income	36,875	34,074	6,067
Office | Tampa
Segment Reporting Information [Line Items]
Total Net Operating Income	30,514	29,426	7,130
Office | Orlando
Segment Reporting Information [Line Items]
Total Net Operating Income		13,029	3,265
Office | Other
Segment Reporting Information [Line Items]
Total Net Operating Income	1,581	1,632	1,504
Mixed-Use
Segment Reporting Information [Line Items]
Total Net Operating Income	2,243	3,983	7,411
Mixed-Use | Atlanta
Segment Reporting Information [Line Items]
Total Net Operating Income	0	3,278	7,411
Mixed-Use | Houston
Segment Reporting Information [Line Items]
Total Net Operating Income			0
Mixed-Use | Charlotte
Segment Reporting Information [Line Items]
Total Net Operating Income	0	0	0
Mixed-Use | Austin
Segment Reporting Information [Line Items]
Total Net Operating Income	0	0	0
Mixed-Use | Phoenix
Segment Reporting Information [Line Items]
Total Net Operating Income	0	0	0
Mixed-Use | Tampa
Segment Reporting Information [Line Items]
Total Net Operating Income	0	0	0
Mixed-Use | Orlando
Segment Reporting Information [Line Items]
Total Net Operating Income		0	0
Mixed-Use | Other
Segment Reporting Information [Line Items]
Total Net Operating Income	$ 2,243	$ 705	$ 0

Reportable Segments (Reconcilia

Reportable Segments (Reconciliation of Net Income to Net Operating Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting [Abstract]
Net income	$ 80,765	$ 219,959	$ 80,104
Net operating income from unconsolidated joint ventures	28,888	31,053	28,785
Net operating income from discontinued operations	0	0	78,591
Fee income	(10,089)	(8,632)	(8,347)
Other income	(3,270)	(11,518)	(1,050)
Reimbursed expenses	3,782	3,527	3,259
General and administrative expenses	22,040	27,523	25,592
Total interest expense	39,430	33,524	26,650
Depreciation and amortization	181,382	196,745	97,948
Acquisition and transaction costs	248	1,661	24,521
Other	556	1,796	5,888
(Gain) loss on extinguishment of debt	(8)	(2,258)	5,180
Income from unconsolidated joint ventures	(12,224)	(47,115)	(10,562)
Gain on sale of investment properties	(5,437)	(133,059)	(77,114)
Income from discontinued operations	0	0	(19,163)
Net Operating Income	$ 326,063	$ 313,206	$ 260,282

Reportable Segments (Segment Re

Reportable Segments (Segment Revenues) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total rental property revenues	$ 475,212	$ 466,185	$ 259,211
Rental property revenues
Segment Reporting Information [Line Items]
Total rental property revenues	461,853	446,035	249,814
Rental property revenues | Office
Segment Reporting Information [Line Items]
Total rental property revenues	461,853	446,035	249,814
Rental property revenues | Mixed-Use
Segment Reporting Information [Line Items]
Total rental property revenues	0	0	0
Rental property revenues | Operating Segments
Segment Reporting Information [Line Items]
Total rental property revenues	509,350	496,270	430,961
Rental property revenues | Operating Segments | Atlanta
Segment Reporting Information [Line Items]
Total rental property revenues	206,129	181,427	173,583
Rental property revenues | Operating Segments | Houston
Segment Reporting Information [Line Items]
Total rental property revenues			136,926
Rental property revenues | Operating Segments | Austin
Segment Reporting Information [Line Items]
Total rental property revenues	104,329	100,939	52,769
Rental property revenues | Operating Segments | Charlotte
Segment Reporting Information [Line Items]
Total rental property revenues	92,454	91,434	39,448
Rental property revenues | Operating Segments | Tampa
Segment Reporting Information [Line Items]
Total rental property revenues	49,812	47,402	10,994
Rental property revenues | Operating Segments | Phoenix
Segment Reporting Information [Line Items]
Total rental property revenues	50,696	46,186	8,902
Rental property revenues | Operating Segments | Orlando
Segment Reporting Information [Line Items]
Total rental property revenues		24,862	5,896
Rental property revenues | Operating Segments | Other
Segment Reporting Information [Line Items]
Total rental property revenues	5,930	4,020	2,443
Rental property revenues | Operating Segments | Office
Segment Reporting Information [Line Items]
Total rental property revenues	505,626	490,034	417,918
Rental property revenues | Operating Segments | Office | Atlanta
Segment Reporting Information [Line Items]
Total rental property revenues	206,129	176,190	160,540
Rental property revenues | Operating Segments | Office | Houston
Segment Reporting Information [Line Items]
Total rental property revenues			136,926
Rental property revenues | Operating Segments | Office | Austin
Segment Reporting Information [Line Items]
Total rental property revenues	104,329	100,939	52,769
Rental property revenues | Operating Segments | Office | Charlotte
Segment Reporting Information [Line Items]
Total rental property revenues	92,454	91,434	39,448
Rental property revenues | Operating Segments | Office | Tampa
Segment Reporting Information [Line Items]
Total rental property revenues	49,812	47,402	10,994
Rental property revenues | Operating Segments | Office | Phoenix
Segment Reporting Information [Line Items]
Total rental property revenues	50,696	46,186	8,902
Rental property revenues | Operating Segments | Office | Orlando
Segment Reporting Information [Line Items]
Total rental property revenues		24,862	5,896
Rental property revenues | Operating Segments | Office | Other
Segment Reporting Information [Line Items]
Total rental property revenues	2,206	3,021	2,443
Rental property revenues | Operating Segments | Mixed-Use
Segment Reporting Information [Line Items]
Total rental property revenues	3,724	6,236	13,043
Rental property revenues | Operating Segments | Mixed-Use | Atlanta
Segment Reporting Information [Line Items]
Total rental property revenues	0	5,237	13,043
Rental property revenues | Operating Segments | Mixed-Use | Houston
Segment Reporting Information [Line Items]
Total rental property revenues			0
Rental property revenues | Operating Segments | Mixed-Use | Austin
Segment Reporting Information [Line Items]
Total rental property revenues	0	0	0
Rental property revenues | Operating Segments | Mixed-Use | Charlotte
Segment Reporting Information [Line Items]
Total rental property revenues	0	0	0
Rental property revenues | Operating Segments | Mixed-Use | Tampa
Segment Reporting Information [Line Items]
Total rental property revenues	0	0	0
Rental property revenues | Operating Segments | Mixed-Use | Phoenix
Segment Reporting Information [Line Items]
Total rental property revenues	0	0	0
Rental property revenues | Operating Segments | Mixed-Use | Orlando
Segment Reporting Information [Line Items]
Total rental property revenues		0	0
Rental property revenues | Operating Segments | Mixed-Use | Other
Segment Reporting Information [Line Items]
Total rental property revenues	3,724	999	0
Rental property revenues | Segment Reconciling Items
Segment Reporting Information [Line Items]
Total rental property revenues	(47,497)	(50,235)	(44,220)
Revenues included in discontinued operations			(136,927)
Rental property revenues | Segment Reconciling Items | Office
Segment Reporting Information [Line Items]
Total rental property revenues	(43,773)	(43,999)	(31,177)
Revenues included in discontinued operations			(136,927)
Rental property revenues | Segment Reconciling Items | Mixed-Use
Segment Reporting Information [Line Items]
Total rental property revenues	$ (3,724)	$ (6,236)	(13,043)
Revenues included in discontinued operations			$ 0

Real Estate and Accumulated D_2

Real Estate and Accumulated Depreciation (Schedule of Properties) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Initial Cost to Company
Land and Improvements	$ 405,065
Buildings and Improvements	2,854,212
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(11,804)
Building and Improvements less Cost of Sales, Transfers and Other	873,813
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	393,261
Building and Improvements less Cost of Sales, Transfers and Other	3,728,025
Total	4,121,286	$ 3,893,799	$ 3,814,986	$ 2,606,343
Accumulated Depreciation	421,495	$ 275,977	$ 215,856	$ 359,422
OPERATING PROPERTIES
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	467,362
Initial Cost to Company
Land and Improvements	309,277
Buildings and Improvements	2,854,212
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	5,602
Building and Improvements less Cost of Sales, Transfers and Other	855,415
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	314,879
Building and Improvements less Cost of Sales, Transfers and Other	3,709,627
Total	4,024,506
Accumulated Depreciation	421,495
OPERATING PROPERTIES | Austin, TX | Colorado Tower
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	119,427
Initial Cost to Company
Land and Improvements	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	1,600
Building and Improvements less Cost of Sales, Transfers and Other	120,853
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	1,600
Building and Improvements less Cost of Sales, Transfers and Other	120,853
Total	122,453
Accumulated Depreciation	$ 23,757
Life on Which Depreciation in 2016 Statement of Operations is Computed	30 years
OPERATING PROPERTIES | Austin, TX | 816 Congress
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 81,676
Initial Cost to Company
Land and Improvements	6,817
Buildings and Improvements	89,891
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	3,282
Building and Improvements less Cost of Sales, Transfers and Other	23,333
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	10,099
Building and Improvements less Cost of Sales, Transfers and Other	113,224
Total	123,323
Accumulated Depreciation	$ 25,159
Life on Which Depreciation in 2016 Statement of Operations is Computed	42 years
OPERATING PROPERTIES | Austin, TX | Research Park
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	4,373
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	801
Building and Improvements less Cost of Sales, Transfers and Other	42,390
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	5,174
Building and Improvements less Cost of Sales, Transfers and Other	42,390
Total	47,564
Accumulated Depreciation	$ 5,282
Life on Which Depreciation in 2016 Statement of Operations is Computed	30 years
OPERATING PROPERTIES | Austin, TX | One Eleven Congress
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	33,841
Buildings and Improvements	201,707
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	25,218
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	33,841
Building and Improvements less Cost of Sales, Transfers and Other	226,925
Total	260,766
Accumulated Depreciation	$ 17,823
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Austin, TX | San Jacinto Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	34,068
Buildings and Improvements	176,535
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(579)
Building and Improvements less Cost of Sales, Transfers and Other	8,180
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	33,489
Building and Improvements less Cost of Sales, Transfers and Other	184,715
Total	218,204
Accumulated Depreciation	$ 13,645
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | Northpark Town Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	22,350
Buildings and Improvements	295,825
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	59,539
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	22,350
Building and Improvements less Cost of Sales, Transfers and Other	355,364
Total	377,714
Accumulated Depreciation	$ 54,804
Life on Which Depreciation in 2016 Statement of Operations is Computed	39 years
OPERATING PROPERTIES | Atlanta, GA | Promenade
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 99,238
Initial Cost to Company
Land and Improvements	13,439
Buildings and Improvements	102,790
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	40,193
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	13,439
Building and Improvements less Cost of Sales, Transfers and Other	142,983
Total	156,422
Accumulated Depreciation	$ 47,862
Life on Which Depreciation in 2016 Statement of Operations is Computed	34 years
OPERATING PROPERTIES | Atlanta, GA | Meridian Mark Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 23,524
Initial Cost to Company
Land and Improvements	2,219
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	29,835
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	2,219
Building and Improvements less Cost of Sales, Transfers and Other	29,835
Total	32,054
Accumulated Depreciation	$ 20,836
Life on Which Depreciation in 2016 Statement of Operations is Computed	30 years
OPERATING PROPERTIES | Atlanta, GA | 3344 Peachtree
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	16,110
Buildings and Improvements	176,153
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	11,798
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	16,110
Building and Improvements less Cost of Sales, Transfers and Other	187,951
Total	204,061
Accumulated Depreciation	$ 16,117
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | Buckhead Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	35,064
Buildings and Improvements	234,111
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	6,066
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	35,064
Building and Improvements less Cost of Sales, Transfers and Other	240,177
Total	275,241
Accumulated Depreciation	$ 20,965
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | 3350 Peachtree
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	16,836
Buildings and Improvements	108,177
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	2,623
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	16,836
Building and Improvements less Cost of Sales, Transfers and Other	110,800
Total	127,636
Accumulated Depreciation	$ 9,979
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | 3348 Peachtree
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	6,707
Buildings and Improvements	69,723
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	701
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	6,707
Building and Improvements less Cost of Sales, Transfers and Other	70,424
Total	77,131
Accumulated Depreciation	$ 6,706
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | 8000 Avalon
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	4,130
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	72
Building and Improvements less Cost of Sales, Transfers and Other	72,747
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	4,202
Building and Improvements less Cost of Sales, Transfers and Other	72,747
Total	76,949
Accumulated Depreciation	$ 3,245
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | Spring & 8th
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	28,131
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	426
Building and Improvements less Cost of Sales, Transfers and Other	301,249
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	28,557
Building and Improvements less Cost of Sales, Transfers and Other	301,249
Total	329,806
Accumulated Depreciation	$ 8,094
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Charlotte, NC | Fifth Third Center
Initial Cost to Company
Land and Improvements	$ 22,591
Buildings and Improvements	180,430
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	18,449
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	22,591
Building and Improvements less Cost of Sales, Transfers and Other	198,879
Total	221,470
Accumulated Depreciation	$ 32,760
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Charlotte, NC | Hearst Tower
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	9,977
Buildings and Improvements	323,299
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	5,108
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	9,977
Building and Improvements less Cost of Sales, Transfers and Other	328,407
Total	338,384
Accumulated Depreciation	$ 26,928
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Charlotte, NC | NASCAR Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	51
Buildings and Improvements	115,238
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	2,389
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	51
Building and Improvements less Cost of Sales, Transfers and Other	117,627
Total	117,678
Accumulated Depreciation	$ 10,959
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Tampa, FL | Corporate Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	7,298
Buildings and Improvements	272,148
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	37,671
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	7,298
Building and Improvements less Cost of Sales, Transfers and Other	309,819
Total	317,117
Accumulated Depreciation	$ 26,604
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Tampa, FL | The Pointe
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	9,404
Buildings and Improvements	54,694
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	3,807
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	9,404
Building and Improvements less Cost of Sales, Transfers and Other	58,501
Total	67,905
Accumulated Depreciation	$ 6,286
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Tampa, FL | Harborview Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	10,800
Buildings and Improvements	39,136
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	3,256
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	10,800
Building and Improvements less Cost of Sales, Transfers and Other	42,392
Total	53,192
Accumulated Depreciation	$ 4,257
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Phoenix, AZ | Hayden Ferry
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	13,102
Buildings and Improvements	262,578
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	19,541
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	13,102
Building and Improvements less Cost of Sales, Transfers and Other	282,119
Total	295,221
Accumulated Depreciation	$ 26,820
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Phoenix, AZ | 111 West Rio
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	6,076
Buildings and Improvements	56,647
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	16,748
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	6,076
Building and Improvements less Cost of Sales, Transfers and Other	73,395
Total	79,471
Accumulated Depreciation	$ 4,078
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Phoenix, AZ | Tempe Gateway
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	5,893
Buildings and Improvements	95,130
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	3,721
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	5,893
Building and Improvements less Cost of Sales, Transfers and Other	98,851
Total	104,744
Accumulated Depreciation	$ 8,529
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
PROJECTS UNDER DEVELOPMENT
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	5,819
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	18,398
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	5,819
Building and Improvements less Cost of Sales, Transfers and Other	18,398
Total	24,217
Accumulated Depreciation	0
PROJECTS UNDER DEVELOPMENT | Suburban Atlanta, GA | 10000 Avalon
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	5,819
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	18,398
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	5,819
Building and Improvements less Cost of Sales, Transfers and Other	18,398
Total	24,217
Accumulated Depreciation	0
LAND
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	89,969
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(17,406)
Building and Improvements less Cost of Sales, Transfers and Other	0
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	72,563
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	72,563
Accumulated Depreciation	0
LAND | Atlanta, GA | 901 West Peachtree St.
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	11,883
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	0
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	11,883
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	11,883
Accumulated Depreciation	0
LAND | Atlanta, GA | 3rd and West Peachtree St.
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	37,037
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	0
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	37,037
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	37,037
Accumulated Depreciation	0
LAND | Phoenix, AZ | 100 Mill
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	19,515
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	0
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	19,515
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	19,515
Accumulated Depreciation	0
LAND | Suburban Atlanta, GA | Land Adjacent to The Avenue Forsyth
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	11,240
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(7,540)
Building and Improvements less Cost of Sales, Transfers and Other	0
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	3,700
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	3,700
Accumulated Depreciation	0
LAND | Suburban Atlanta, GA | North Point
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	10,294
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(9,866)
Building and Improvements less Cost of Sales, Transfers and Other	0
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	428
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	428
Accumulated Depreciation	$ 0

Real Estate and Accumulated D_3

Real Estate and Accumulated Depreciation (Notes to Schedule III) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate
Balance at beginning of period	$ 3,893,799	$ 3,814,986	$ 2,606,343
Additions during the period:
Acquisitions	48,920	62,723	0
Improvements and other capitalized costs	178,567	303,940	208,016
Transfers	0	0	5,306
Total Additions	227,487	366,663	3,046,052
Deductions during the period:
Parkway spin-off	0	0	(1,230,235)
Cost of real estate sold	0	(287,850)	(602,648)
Impairment loss	0	0	(4,526)
Total Deductions	0	(287,850)	(1,837,409)
Balance at end of period	4,121,286	3,893,799	3,814,986
Accumulated Depreciation
Balance at beginning of period	275,977	215,856	359,422
Additions during the period:
Acquisitions	0	0	0
Improvements and other capitalized costs	0	0	0
Transfers	0	0	0
Depreciation expense	145,518	101,720	112,277
Total Additions	145,518	101,720	112,277
Deductions during the period:
Parkway spin-off	0	0	(148,523)
Cost of real estate sold	0	(41,599)	(107,320)
Impairment loss	0	0	0
Total Deductions	0	(41,599)	(255,843)
Balance at end of period	421,495	275,977	215,856
Aggregate cost for federal income tax, net of depreciation	$ 3,000,000
Buildings and Improvements | Minimum
Deductions during the period:
Useful life	30 years
Buildings and Improvements | Maximum
Deductions during the period:
Useful life	42 years
Parkway merger
Additions during the period:
Acquisitions	$ 0	0	2,832,730
Additions during the period:
Acquisitions	$ 0	$ 0	$ 0