Cousins Properties (CUZ) 10-K 5 Feb 20 2019 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2019	Jan. 29, 2020	Jun. 30, 2019
Cover page.
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Entity File Number	001-11312
Entity Registrant Name	COUSINS PROPERTIES INC
Entity Central Index Key	0000025232
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Incorporation, State or Country Code	GA
Entity Tax Identification Number	58-0869052
Entity Address, Address Line One	3344 Peachtree Road NE
Entity Address, Address Line Two	Suite 1800
Entity Address, City or Town	Atlanta
Entity Address, State or Province	GA
Entity Address, Postal Zip Code	30326-4802
City Area Code	(404)
Local Phone Number	407-1000
Title of 12(b) Security	Common Stock ($1 par value)
Trading Symbol	CUZ
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 5,333,335,006
Entity Common Stock, Shares Outstanding		146,766,272
Documents Incorporated by Reference	Portions of the Registrant’s proxy statement for the annual stockholders meeting to be held on April 21, 2020 are incorporated by reference into Part III of this Form 10-K.

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Real estate assets:
Operating properties, net of accumulated depreciation of $577,139 and $421,495 in 2019 and 2018, respectively	$ 5,669,324	$ 3,603,011
Projects under development	410,097	24,217
Land	116,860	72,563
Total properties	6,196,281	3,699,791
Real estate assets and other assets held for sale, net of accumulated depreciation and amortization of $61,093 in 2019	360,582	0
Cash and cash equivalents	15,603	2,547
Restricted cash	2,005	148
Notes and accounts receivable	23,680	13,821
Deferred rents receivable	102,314	83,116
Investment in unconsolidated joint ventures	133,884	161,907
Intangible assets, net	257,649	145,883
Other assets	59,449	39,083
Total assets	7,151,447	4,146,296
Liabilities:
Notes payable	2,222,975	1,062,570
Accounts payable and accrued expenses	209,904	110,159
Deferred income	52,269	41,266
Intangible liabilities, net of accumulated amortization of $55,798 and $42,473 in 2019 and 2018, respectively	83,105	56,941
Other liabilities	134,128	54,204
Liabilities of real estate assets held for sale, net of accumulated amortization of $7,771 in 2019	21,231	0
Total liabilities	2,723,612	1,325,140
Commitments and contingencies
Stockholders' investment:
Preferred stock, $1 par value, 20,000,000 shares authorized, 1,716,837 shares issued and outstanding in 2019 and 2018	1,717	1,717
Common stock, $1 par value, 300,000,000 and 175,000,000 shares authorized in 2019 and 2018, respectively, and 149,347,382 and 107,681,130 shares issued in 2019 and 2018, respectively	149,347	107,681
Additional paid-in capital	5,493,883	3,934,385
Treasury stock at cost, 2,584,933 shares in 2019 and 2018	(148,473)	(148,473)
Distributions in excess of cumulative net income	(1,137,200)	(1,129,445)
Total stockholders' investment	4,359,274	2,765,865
Nonredeemable noncontrolling interests	68,561	55,291
Total equity	4,427,835	2,821,156
Total liabilities and equity	$ 7,151,447	$ 4,146,296

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Operating properties, accumulated depreciation	$ 577,139	$ 421,495
Real estate assets and other assets held for sale, accumulated depreciation	61,093
Intangible liabilities, accumulated amortization	55,798	$ 42,473
Liabilities of real estate assets held for sale, net of accumulated amortization	$ 7,771
Preferred stock, par value (in usd per share)	$ 1	$ 1
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	1,716,837	1,716,837
Preferred stock, shares outstanding	1,716,837	1,716,837
Common stock, par value (in usd per share)	$ 1	$ 1
Common stock, shares authorized	300,000,000	175,000,000
Common stock, shares issued	149,347,382	107,681,130
Treasury stock, shares	2,584,933	2,584,933

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Total rental property revenues	$ 657,515	$ 475,212	$ 466,185
Expenses:
Rental property operating expenses	222,146	164,678	163,882
Reimbursed expenses	4,004	3,782	3,527
General and administrative expenses	37,007	22,040	27,523
Interest expense	53,963	39,430	33,524
Depreciation and amortization	257,149	181,382	196,745
Transaction costs	52,881	248	1,661
Other	1,109	556	1,796
Total costs and expenses	628,259	412,116	428,658
Income from unconsolidated joint ventures	12,666	12,224	47,115
Gain on investment property transactions	110,761	5,437	133,059
Gain on extinguishment of debt	0	8	2,258
Net income	152,683	80,765	219,959
Net income attributable to noncontrolling interests	(2,265)	(1,601)	(3,684)
Net income available to common stockholders	$ 150,418	$ 79,164	$ 216,275
Net income per common share — basic and diluted (in usd per share)	$ 1.17	$ 0.75	$ 2.08
Weighted average shares — basic (in shares)	128,060	105,076	103,902
Weighted average shares — diluted (in shares)	129,831	106,868	105,824
Dividends declared per common share (in usd per share)	$ 1.16	$ 1.04	$ 1.20
Rental property revenues
Revenues:
Total rental property revenues	$ 628,751	$ 463,401	$ 455,305
Fee income
Revenues:
Total rental property revenues	28,518	10,089	8,632
Other
Revenues:
Total rental property revenues	$ 246	$ 1,722	$ 2,248

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, 2016	$ 2,514,240	$ 1,717	$ 100,936	$ 3,715,391	$ (148,373)	$ (1,214,114)	$ 2,455,557	$ 58,683
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	219,959					216,275	216,275	3,684
Common stock offering, net of issuance costs	211,774		6,250	205,524			211,774
Common stock issuance pursuant to stock based compensation	124		100	24			124
Spin-off of Parkway, Inc.	545					545	545
Common stock redemption by unit holders	0		301	9,767			10,068	(10,068)
Amortization of stock options and restricted stock, net of forfeitures	1,983			1,983			1,983
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	1,717	107,587	3,932,689	(148,373)	(1,121,647)	2,771,973	53,138
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	80,765					79,164	79,164	1,601
Common stock issuance pursuant to stock based compensation	(567)		99	(566)	(100)		(567)
Amortization of stock options and restricted stock, net of forfeitures	2,257		(5)	2,262			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	1,717	107,681	3,934,385	(148,473)	(1,129,445)	2,765,865	55,291
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	152,683					150,418	150,418	2,265
Common stock issued in merger	1,598,189		41,576	1,556,613			1,598,189
Common stock issuance pursuant to stock based compensation	507		91	416			507
Amortization of stock options and restricted stock, net of forfeitures	2,468		(1)	2,469			2,468
Nonredeemable noncontrolling interests acquired in merger	5,329							5,329
Contributions from nonredeemable noncontrolling interests	8,087							8,087
Distributions to nonredeemable noncontrolling interests	(2,411)							(2,411)
Common dividends	(158,173)					(158,173)	(158,173)
Ending balance at Dec. 31, 2019	$ 4,427,835	$ 1,717	$ 149,347	$ 5,493,883	$ (148,473)	$ (1,137,200)	$ 4,359,274	$ 68,561

Consolidated Statements of Eq_2

Consolidated Statements of Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]
Common dividends per share (in usd per share)	$ 1.16	$ 1.04	$ 1.20

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 152,683	$ 80,765	$ 219,959
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on investment property transactions	(110,761)	(5,437)	(133,059)
Depreciation and amortization	257,149	181,382	196,745
Amortization of deferred financing costs and premium on notes payable	1,500	2,417	(2,139)
Stock-based compensation expense, net of forfeitures	3,830	3,399	2,994
Effect of non-cash adjustments to rental revenues	(44,839)	(32,401)	(40,410)
Income from unconsolidated joint ventures	(12,666)	(12,224)	(47,115)
Operating distributions from unconsolidated joint ventures	11,792	16,756	11,065
Gain on extinguishment of debt	0	(8)	(2,258)
Changes in other operating assets and liabilities:
Change in other receivables and other assets, net	(10,079)	(6,049)	11,456
Change in operating liabilities, net	54,568	434	(5,589)
Net cash provided by operating activities	303,177	229,034	211,649
Proceeds from investment property sales
Proceeds from investment property sales	62,667	372	370,944
Proceeds from sale of interest in unconsolidated joint venture	0	0	12,514
Property acquisition, development, and tenant asset expenditures	(482,633)	(223,636)	(319,975)
Cash and restricted cash acquired in merger	85,989	0	0
Purchase of tenant-in-common interest	0	0	(13,382)
Investment in unconsolidated joint ventures	(23,361)	(50,933)	(20,080)
Distributions from unconsolidated joint ventures	10	2,032	75,506
Change in notes receivable and other assets	(96)	(8,317)	6,583
Other	0	(4,002)	0
Net cash provided by (used in) investing activities	(357,424)	(284,484)	112,110
Proceeds from credit facility
Proceeds from credit facility	1,212,000	8,000	589,300
Repayment of credit facility	(960,500)	(8,000)	(723,300)
Repayment of notes payable	(691,179)	(31,402)	(495,913)
Issuance of unsecured senior notes	650,000	0	350,000
Payment of deferred financing costs	(2,868)	(6,166)	(2,074)
Common stock issued, net of expenses	0	0	211,521
Contributions from noncontrolling interests	8,087	1,497	2,646
Distributions to nonredeemable noncontrolling interests	(2,411)	(2,653)	(1,807)
Common dividends paid	(142,941)	(107,167)	(99,151)
Other	(1,028)	(1,709)	(557)
Net cash provided by (used in) financing activities	69,160	(147,600)	(169,335)
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	14,913	(203,050)	154,424
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT BEGINNING OF PERIOD	2,695	205,745	51,321
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT END OF PERIOD	$ 17,608	$ 2,695	$ 205,745

Description of Business and Bas

Description of Business and Basis of Presentation	12 Months Ended
	Dec. 31, 2019
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 99% 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, North Carolina, Arizona, and Florida. Cousins has elected to be taxed as a REIT and intends to, among other things, distribute at least 100% of its net taxable income to stockholders, thereby eliminating any liability for federal income taxes under current law. Therefore, the results included herein do not include a federal income tax provision for Cousins. As of December 31, 2019 , the Company’s portfolio of real estate assets consisted of interests in 21.5 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. On June 14, 2019, the Company restated and amended its articles of incorporation to effect a reverse stock split of the issued and outstanding shares of its common and preferred stock pursuant to which (1) each four shares of the Company's issued and outstanding common stock were combined into one share of the Company's common or preferred stock, respectively, and (2) the authorized number of the Company's common stock was proportionally reduced to 175 million shares. Fractional shares of common stock resulting from the reverse stock split were settled in cash. Preferred stock was redeemed with each four shares combined into one share; fractional shares of preferred stock were redeemed without payout. Immediately thereafter, the Company further amended its articles of incorporation to increase the number of authorized shares of its common stock from 175 million to 300 million shares. All shares of common stock, stock options, restricted stock units, and per share information presented in the consolidated financial statements have been adjusted to reflect the reverse stock split on a retroactive basis for all periods presented. For the three years ended December 31, 2019 , there were no items of other comprehensive income. Therefore, the Company did not present comprehensive income. Additionally, certain subtotals within the consolidated statements of operations for the years ended December 31, 2018 and 2017 were removed to conform to the current period presentation. On January 1, 2019, the Company began recording lease termination fees in rental property revenues on the consolidated statements of operations as a result of the adoption of Accounting Standards Update ("ASU") 2016-02, "Leases," ("ASC 842"). The prior period amounts, which were included in other revenues, were reclassified to conform to the current period presentation. 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, 2019 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, 2019, the Company adopted ASC 842, which amended the previous standard for lease accounting by requiring lessees to record most leases on their balance sheets and by making targeted changes to lessor accounting and reporting. The new standard requires lessees to record a right-of-use asset and a lease liability for leases 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. The classification of the leases determines 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). The new standard also revised the treatment of indirect leasing costs and permits the capitalization and amortization of direct leasing costs only. For the years ended December 31, 2018 and 2017, the Company capitalized $3.8 million and $3.0 million of indirect leasing costs, respectively. The Company adopted the following optional practical expedients provided in ASC 842: • no reassessment of any expired or existing contracts to determine if they contain a lease; • no reassessment of initial direct costs for any existing leases; • no recognition of right-of-use assets and lease liabilities for leases with a term of one year or less; • no separate classification and disclosure of non-lease components of revenue in lease contracts from the related lease components provided certain conditions are met; and • no reassessment of the lease classification. For those leases where the Company was the lessee, specifically ground leases, the adoption of ASC 842 required the Company to record a right-of-use asset and a lease liability in the amount of $56.3 million on the condensed consolidated balance sheet. In calculating the right of use asset and lease liability, the Company used a weighted average discount rate of 4.49% , which represented the Company's incremental borrowing rate related to the ground lease assets as of January 1, 2019. Ground leases executed before the adoption of ASC 842 are accounted for as operating leases and did not result in a materially different ground lease expense. However, most 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, resulting in higher expense associated with the ground lease in the earlier years of a ground lease when compared to the straight line method. The Company used the "modified retrospective" method upon adoption of ASC 842, which permitted application of the new standard on the adoption date as opposed to the earliest comparative period presented in its financial statements. For additional disclosures, see note 6 "Leases" and note 14 "Revenue Recognition" On January 1, 2018, the Company adopted ASU 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"). 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.

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
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 only capitalizes 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, 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 evaluates all real estate acquisitions to determine if the transactions qualify as an acquisition of assets or of a business within the framework of ASU 2017-01 and guidance in ASC 805. If the Company determines that substantially all of the fair value is concentrated in a single identifiable asset or group of similar assets, the Company will account for the acquisition as an acquisition of assets and not a business. If the Company determines that there is no single or group of assets that make up substantially all of the fair value of assets acquired, the Company must determine whether the acquired set of assets includes an input and substantial processes which create an output. Based on the facts of the transactions and guidance in ASC 805, if the Company determines that an input and substantial processes that create an output are present, the Company will account for the acquisition as an acquisition of a business. For acquisitions that are accounted for as an acquisition of an asset, the Company records the acquired tangible and intangible assets and assumed liabilities based on each asset and liability's relative fair value at the acquisition date to the total purchase price plus capitalized acquisition costs. For acquisitions that are accounted for as an acquisition of a business, the Company records the acquired tangible and intangible assets and assumed liabilities 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. 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, if any, 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. The Company records the costs of the tenant improvements, including costs paid for or reimbursed by the tenants, as an asset. The Company records deferred revenue for the portion of tenant improvements funded or reimbursed by tenants and amortizes this amount on a straight-line basis into rental income over the term of the related lease. As of December 31, 2019 and 2018, the Company had unamortized deferred income related to tenant funded tenant improvements of $17.8 million and $16.2 million, respectively, included in deferred income on the consolidated balance sheets. Certain 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 2019 , 2018 , and 2017 , the Company recognized $122.4 million , $79.8 million , and $67.2 million , respectively, in revenues 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 Investment Property Transactions : Through December 31, 2017, 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. Beginning January 1, 2018, in connection with the 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 or losses will be recognized as these performance obligations are satisfied. Income Taxes The Company has elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). To qualify as a REIT, the Company 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 the Company's REIT status. As a REIT, the Company generally will not be subject to federal income tax at the corporate level on the taxable income it distributes to its stockholders. If the Company 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. The Company 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 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 Tier Reit, In

Transactions With Tier Reit, Inc.	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
TRANSACTIONS WITH TIER REIT, INC.	TRANSACTIONS WITH TIER REIT, INC. On June 14, 2019, pursuant to the Agreement and Plan of Merger dated March 25, 2019 (the “Merger Agreement”), by and among the Company and TIER REIT, Inc. (“TIER”), TIER merged with and into a subsidiary of the Company (the “Merger”) with this subsidiary continuing as the surviving corporation of the Merger. The Merger has enhanced the Company's position in its existing markets of Austin and Charlotte, provided a strategic entry into Dallas, and rebalanced the Company's portfolio across its markets. In accordance with the terms and conditions of the Merger Agreement, each share of TIER common stock issued and outstanding immediately prior to the Merger, was converted into 2.98 newly issued, pre-reverse split shares of the Company’s common stock with fractional shares being settled in cash. In the Merger, former TIER common stockholders received approximately 166 million pre-reverse split shares of common stock of the Company. As discussed in note 1 to the consolidated financial statements, immediately following the Merger, the Company completed a 1-for- 4 reverse stock split. The Merger has been accounted for as a business combination with the Company as the accounting acquirer, which requires, among other things, that the assets acquired and liabilities assumed be recognized at their acquisition date fair value. The total value of the transaction is based on the closing stock price of the Company's common stock on June 13, 2019, the day immediately prior to the closing of the Merger. Based on the shares issued in the transaction, the total fair value of the assets acquired net of liabilities assumed in the Merger was $1.6 billion . During the year ended December 31, 2019 , the Company incurred expenses related to the Merger of $52.9 million . Management engaged a third party valuation specialist to assist with valuing the real estate assets acquired and liabilities assumed in the Merger. The third party used cash flow analyses, as well as a market approach, an income approach, and a cost approach to determine the fair value of real estate assets acquired. Based on additional information that may become available, subsequent adjustments may be made to the purchase price allocation within the measurement period, which typically does not exceed one year. The purchase price was allocated as follows (in thousands): Real estate assets $ 2,202,073 Real estate assets held for sale 20,835 Cash and cash equivalents 84,042 Restricted cash 1,947 Notes and other receivables 8,278 Investment in unconsolidated joint ventures 331 Intangible assets 141,184 Other assets 10,040 2,468,730 Notes payable 747,549 Accounts payable and accrued expenses 53,321 Deferred income 8,388 Intangible liabilities 47,988 Other liabilities 7,793 Nonredeemable noncontrolling interests 5,329 870,368 Total purchase price $ 1,598,362 During the year ended December 31, 2019 , the Company recorded revenues and net income of $113.1 million and $291,000 , respectively, from the operations of the assets acquired in the Merger. The following unaudited supplemental pro forma information is based upon the Company's historical consolidated statements of operations, adjusted as if the Merger had occurred on January 1, 2018 . The supplemental pro forma information is not necessarily indicative of future results, or of actual results, that would have been achieved had the Merger been consummated at the beginning of the period. Year ended December 31, 2019 2018 (unaudited, in thousands) Revenues $ 750,080 $ 702,463 Net income 232,136 28,064 Net income available to common stockholders 229,503 27,742 2019 supplemental pro forma earnings were adjusted to exclude the $52.9 million of transaction costs incurred in the year ended December 31, 2019. Supplemental pro forma earnings for the year ended December 31, 2018 were adjusted to include this charge. On March 1, 2019, the Company entered into a series of agreements and executed related transactions with Norfolk Southern Railway Company (“NS”) as follows: • Sold land to NS for $52.5 million . • Executed a Development Agreement with NS whereby the Company will receive fees totaling $5 million in consideration for development services for NS’s corporate headquarters that is being constructed on the land sold to NS. • Executed a Consulting Agreement with NS whereby the Company will receive fees totaling $32 million in consideration for consulting services for NS’s corporate headquarters. The Development Agreement and Consulting Agreement are collectively referred to below as the “Fee Agreements.” • Purchased a building from NS (“1200 Peachtree”) for $82 million subject to a three-year market rate lease with NS that covers the entire building. The Company sold the land to NS for $5.0 million above its carrying amount, which included $37.0 million of land purchased in 2018, $6.5 million of land purchased in 2019, and $4.0 million of site preparation work. The Company purchased 1200 Peachtree from NS for an amount it determined to be $10.3 million below the building’s fair value. The Company determined that all contracts and transactions associated with NS should be combined for accounting purposes, and the amounts exchanged under the combined contracts should be allocated to the various components of the overall transaction at fair value or market value as discussed below. The Company determined that the purchase of 1200 Peachtree should be recorded at fair value of $92.3 million (see note 5 for allocation of the purchase price). The Company determined that the lease with NS at the 1200 Peachtree building was at market value under ASC 842. The land sale was accounted for under ASC 610-20, and no gain or loss was recorded on the derecognition of this non-financial asset as the fair value was determined to equal the carrying amount. Consideration related to various services provided to NS, and accounted for under ASC 606, was determined to be $52.3 million and represents the negotiated market value for the services agreed to by the Company and NS in the contracts. This amount included non-cash consideration of the $10.3 million discount on the purchase of 1200 Peachtree as well as cash consideration of $5 million from the land sale contract (difference between fair value and contract amount), $5 million from the Development Agreement, and $32 million from the Consulting Agreement. Since all of the agreements and contracts above were executed for the purpose of delivering and constructing a corporate headquarters for NS and all of the services and deliverables are highly interdependent, the Company determined that the services represent a single performance obligation under ASC 606. The Company determined that control of the services to be provided is being transferred over time and, thus, the Company must recognize the $52.3 million contract price in revenue as it satisfies the performance obligation. The Company determined that the inputs method of measuring progress of satisfying the performance obligation was the most appropriate method of recognizing revenue for the services component. Therefore, the Company began recognizing revenue on March 1, 2019 , based upon the time spent by the Company’s employees in providing these services as compared to the total estimated time required to satisfy the performance obligation. During the year ended December 31, 2019 , the Company recognized $21.4 million in fee income in the statement of operations related to the services provided to NS. As of December 31, 2019, the Company had deferred income included in the consolidated balance sheet of $11.3 million related to NS.

Transactions with Norfolk South

Transactions with Norfolk Southern Railway Company (Notes)	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
TRANSACTIONS WITH NORFOLK SOUTHERN RAILWAY COMPANY	TRANSACTIONS WITH TIER REIT, INC. On June 14, 2019, pursuant to the Agreement and Plan of Merger dated March 25, 2019 (the “Merger Agreement”), by and among the Company and TIER REIT, Inc. (“TIER”), TIER merged with and into a subsidiary of the Company (the “Merger”) with this subsidiary continuing as the surviving corporation of the Merger. The Merger has enhanced the Company's position in its existing markets of Austin and Charlotte, provided a strategic entry into Dallas, and rebalanced the Company's portfolio across its markets. In accordance with the terms and conditions of the Merger Agreement, each share of TIER common stock issued and outstanding immediately prior to the Merger, was converted into 2.98 newly issued, pre-reverse split shares of the Company’s common stock with fractional shares being settled in cash. In the Merger, former TIER common stockholders received approximately 166 million pre-reverse split shares of common stock of the Company. As discussed in note 1 to the consolidated financial statements, immediately following the Merger, the Company completed a 1-for- 4 reverse stock split. The Merger has been accounted for as a business combination with the Company as the accounting acquirer, which requires, among other things, that the assets acquired and liabilities assumed be recognized at their acquisition date fair value. The total value of the transaction is based on the closing stock price of the Company's common stock on June 13, 2019, the day immediately prior to the closing of the Merger. Based on the shares issued in the transaction, the total fair value of the assets acquired net of liabilities assumed in the Merger was $1.6 billion . During the year ended December 31, 2019 , the Company incurred expenses related to the Merger of $52.9 million . Management engaged a third party valuation specialist to assist with valuing the real estate assets acquired and liabilities assumed in the Merger. The third party used cash flow analyses, as well as a market approach, an income approach, and a cost approach to determine the fair value of real estate assets acquired. Based on additional information that may become available, subsequent adjustments may be made to the purchase price allocation within the measurement period, which typically does not exceed one year. The purchase price was allocated as follows (in thousands): Real estate assets $ 2,202,073 Real estate assets held for sale 20,835 Cash and cash equivalents 84,042 Restricted cash 1,947 Notes and other receivables 8,278 Investment in unconsolidated joint ventures 331 Intangible assets 141,184 Other assets 10,040 2,468,730 Notes payable 747,549 Accounts payable and accrued expenses 53,321 Deferred income 8,388 Intangible liabilities 47,988 Other liabilities 7,793 Nonredeemable noncontrolling interests 5,329 870,368 Total purchase price $ 1,598,362 During the year ended December 31, 2019 , the Company recorded revenues and net income of $113.1 million and $291,000 , respectively, from the operations of the assets acquired in the Merger. The following unaudited supplemental pro forma information is based upon the Company's historical consolidated statements of operations, adjusted as if the Merger had occurred on January 1, 2018 . The supplemental pro forma information is not necessarily indicative of future results, or of actual results, that would have been achieved had the Merger been consummated at the beginning of the period. Year ended December 31, 2019 2018 (unaudited, in thousands) Revenues $ 750,080 $ 702,463 Net income 232,136 28,064 Net income available to common stockholders 229,503 27,742 2019 supplemental pro forma earnings were adjusted to exclude the $52.9 million of transaction costs incurred in the year ended December 31, 2019. Supplemental pro forma earnings for the year ended December 31, 2018 were adjusted to include this charge. On March 1, 2019, the Company entered into a series of agreements and executed related transactions with Norfolk Southern Railway Company (“NS”) as follows: • Sold land to NS for $52.5 million . • Executed a Development Agreement with NS whereby the Company will receive fees totaling $5 million in consideration for development services for NS’s corporate headquarters that is being constructed on the land sold to NS. • Executed a Consulting Agreement with NS whereby the Company will receive fees totaling $32 million in consideration for consulting services for NS’s corporate headquarters. The Development Agreement and Consulting Agreement are collectively referred to below as the “Fee Agreements.” • Purchased a building from NS (“1200 Peachtree”) for $82 million subject to a three-year market rate lease with NS that covers the entire building. The Company sold the land to NS for $5.0 million above its carrying amount, which included $37.0 million of land purchased in 2018, $6.5 million of land purchased in 2019, and $4.0 million of site preparation work. The Company purchased 1200 Peachtree from NS for an amount it determined to be $10.3 million below the building’s fair value. The Company determined that all contracts and transactions associated with NS should be combined for accounting purposes, and the amounts exchanged under the combined contracts should be allocated to the various components of the overall transaction at fair value or market value as discussed below. The Company determined that the purchase of 1200 Peachtree should be recorded at fair value of $92.3 million (see note 5 for allocation of the purchase price). The Company determined that the lease with NS at the 1200 Peachtree building was at market value under ASC 842. The land sale was accounted for under ASC 610-20, and no gain or loss was recorded on the derecognition of this non-financial asset as the fair value was determined to equal the carrying amount. Consideration related to various services provided to NS, and accounted for under ASC 606, was determined to be $52.3 million and represents the negotiated market value for the services agreed to by the Company and NS in the contracts. This amount included non-cash consideration of the $10.3 million discount on the purchase of 1200 Peachtree as well as cash consideration of $5 million from the land sale contract (difference between fair value and contract amount), $5 million from the Development Agreement, and $32 million from the Consulting Agreement. Since all of the agreements and contracts above were executed for the purpose of delivering and constructing a corporate headquarters for NS and all of the services and deliverables are highly interdependent, the Company determined that the services represent a single performance obligation under ASC 606. The Company determined that control of the services to be provided is being transferred over time and, thus, the Company must recognize the $52.3 million contract price in revenue as it satisfies the performance obligation. The Company determined that the inputs method of measuring progress of satisfying the performance obligation was the most appropriate method of recognizing revenue for the services component. Therefore, the Company began recognizing revenue on March 1, 2019 , based upon the time spent by the Company’s employees in providing these services as compared to the total estimated time required to satisfy the performance obligation. During the year ended December 31, 2019 , the Company recognized $21.4 million in fee income in the statement of operations related to the services provided to NS. As of December 31, 2019, the Company had deferred income included in the consolidated balance sheet of $11.3 million related to NS.

Real Estate Transactions

Real Estate Transactions	12 Months Ended
	Dec. 31, 2019
Real Estate [Abstract]
REAL ESTATE TRANSACTIONS	REAL ESTATE TRANSACTIONS Dispositions The Company had no dispositions of operating properties in 2019 or 2018 . The Company sold the following properties in 2017 ($ in thousands): Property Property Type Location Square Feet Sales Price 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 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. During February 2019, the Company sold air rights that cover eight acres in Downtown Atlanta for a gross sales price of $13.25 million and recorded a gain of $13.1 million . As of December 31, 2019, the Company's Woodcrest and Hearst Tower properties were classified as held for sale. The major classes of assets and liabilities of these properties held for sale were as follows (in thousands): Real estate assets and other assets held for sale Operating properties, net of accumulated depreciation of $44,478 $ 340,171 Notes and accounts receivable 5,520 Deferred rents receivable 5,745 Intangible assets, net of accumulated amortization of $16,615 8,657 Other assets 489 $ 360,582 Liabilities of real estate assets held for sale Accounts payable and accrued expenses $ 12,497 Deferred income 2,638 Intangible liabilities, net of accumulated amortization of $7,771 5,471 Other liabilities 625 $ 21,231 Acquisitions During 2019, the Company acquired 1200 Peachtree as discussed in note 4 and acquired its partner's interest in Terminus Office Holdings LLC as discussed in note 8. The Company accounted for these transactions as an acquisition of assets and the following table summarizes the allocation of the purchase price of these properties (in thousands): 1200 Peachtree Terminus Tangible assets: Building and improvements $ 62,836 $ 410,826 Land and improvements 19,495 49,345 Tangible assets 82,331 460,171 Intangible assets: In-place leases 9,969 24,674 Above market leases — 7,193 Intangible assets 9,969 31,867 Intangible liabilities: Below market leases — 4,745 Intangible liabilities — 4,745 Total net assets acquired $ 92,300 $ 487,293

Leases

Leases	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Leases	LEASES At December 31, 2019 , the Company had five properties subject to operating ground leases with a weighted average remaining term of 72 years and two finance ground leases with a weighted average remaining term of four years . At December 31, 2019 , the Company had right-of-use assets from operating ground leases of $57.3 million included in operating properties, projects under development, or land on the consolidated balance sheet and right-of-use assets from finance ground leases of $11.9 million included in land on the consolidated balance sheet. At December 31, 2019 , the Company had lease liabilities for operating and finance ground leases of $59.4 million and $9.7 million, respectively, included in other liabilities on the consolidated balance sheet. The weighted average discount rate on these ground leases at December 31, 2019 was 4.5% . Rental payments on these ground leases are adjusted periodically based on either the Consumer Price Index, changes in developed square feet on the underlying leased asset, or on a pre-determined schedule. The monthly payments on a pre-determined schedule are recognized on a straight-line basis over the terms of the respective leases while payments resulting from changes in the Consumer Price Index or future development are reflected in the statement of operations at the time of the change. For the years ended December 31, 2019 , 2018 , and 2017 , the Company recognized operating ground lease expense of $3.9 million, $3.5 million , and $3.2 million , respectively. For the year ended December 31, 2019 the Company had no variable lease expenses related to ground lease expense, and recognized interest expense related to finance ground leases of $462,000 . For the year ended December 31, 2019 , the Company paid $2.6 million in cash related to operating ground leases and made $462,000 in cash payments related to financing ground leases. The following table represents the undiscounted cash flows of our scheduled obligations for future minimum payments for ground leases as of December 31, 2019 , with a reconciliation of these cash flows to the related ground lease liabilities in accordance with ASC 842 (in thousands): Operating Ground Leases Finance Ground Leases 2020 $ 3,175 $ 462 2021 2,959 6,562 2022 2,672 162 2023 2,614 162 2024 2,497 162 Thereafter 200,107 3,676 $ 214,024 $ 11,186 Discount (154,645 ) (1,456 ) Lease liability $ 59,379 $ 9,730 The following table represents undiscounted cash flows of our scheduled obligations for future minimum payments on ground leases as of December 31, 2018, in accordance with ASC 840 (in thousands): Operating Ground Leases Finance Ground Leases 2019 $ 2,441 $ 462 2020 2,460 462 2021 2,497 6,562 2022 2,497 162 2023 2,497 162 Thereafter 202,603 3,838 $ 214,995 $ 11,648
Leases	LEASES At December 31, 2019 , the Company had five properties subject to operating ground leases with a weighted average remaining term of 72 years and two finance ground leases with a weighted average remaining term of four years . At December 31, 2019 , the Company had right-of-use assets from operating ground leases of $57.3 million included in operating properties, projects under development, or land on the consolidated balance sheet and right-of-use assets from finance ground leases of $11.9 million included in land on the consolidated balance sheet. At December 31, 2019 , the Company had lease liabilities for operating and finance ground leases of $59.4 million and $9.7 million, respectively, included in other liabilities on the consolidated balance sheet. The weighted average discount rate on these ground leases at December 31, 2019 was 4.5% . Rental payments on these ground leases are adjusted periodically based on either the Consumer Price Index, changes in developed square feet on the underlying leased asset, or on a pre-determined schedule. The monthly payments on a pre-determined schedule are recognized on a straight-line basis over the terms of the respective leases while payments resulting from changes in the Consumer Price Index or future development are reflected in the statement of operations at the time of the change. For the years ended December 31, 2019 , 2018 , and 2017 , the Company recognized operating ground lease expense of $3.9 million, $3.5 million , and $3.2 million , respectively. For the year ended December 31, 2019 the Company had no variable lease expenses related to ground lease expense, and recognized interest expense related to finance ground leases of $462,000 . For the year ended December 31, 2019 , the Company paid $2.6 million in cash related to operating ground leases and made $462,000 in cash payments related to financing ground leases. The following table represents the undiscounted cash flows of our scheduled obligations for future minimum payments for ground leases as of December 31, 2019 , with a reconciliation of these cash flows to the related ground lease liabilities in accordance with ASC 842 (in thousands): Operating Ground Leases Finance Ground Leases 2020 $ 3,175 $ 462 2021 2,959 6,562 2022 2,672 162 2023 2,614 162 2024 2,497 162 Thereafter 200,107 3,676 $ 214,024 $ 11,186 Discount (154,645 ) (1,456 ) Lease liability $ 59,379 $ 9,730 The following table represents undiscounted cash flows of our scheduled obligations for future minimum payments on ground leases as of December 31, 2018, in accordance with ASC 840 (in thousands): Operating Ground Leases Finance Ground Leases 2019 $ 2,441 $ 462 2020 2,460 462 2021 2,497 6,562 2022 2,497 162 2023 2,497 162 Thereafter 202,603 3,838 $ 214,995 $ 11,648

Notes and Accounts Receivable

Notes and Accounts Receivable	12 Months Ended
	Dec. 31, 2019
Receivables [Abstract]
NOTES AND ACCOUNTS RECEIVABLE	NOTES AND ACCOUNTS RECEIVABLE At December 31, 2019 and 2018 , notes and accounts receivables included the following (in thousands): 2019 2018 Notes receivable $ 356 $ 453 Tenant and other receivables 23,324 13,368 $ 23,680 $ 13,821 At December 31, 2019 and 2018 , 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, 2019 and 2018 . 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, 2019
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, 2019 and 2018 (in thousands). The information included in the summary of operations table is for the years ended December 31, 2019 , 2018 , and 2017 (in thousands). Total Assets Total Debt Total Equity (Deficit) Company's Investment SUMMARY OF FINANCIAL POSITION 2019 2018 2019 2018 2019 2018 2019 2018 DC Charlotte Plaza LLLP $ 179,694 $ 155,530 $ — $ — $ 90,373 $ 88,922 $ 48,058 $ 46,554 Austin 300 Colorado Project, LP 112,630 51,180 21,430 — 68,101 41,298 36,846 22,335 Carolina Square Holdings LP 114,483 106,187 75,662 74,638 25,184 28,844 14,414 16,840 AMCO 120 WT Holdings, LLC 77,377 36,680 — — 70,696 31,372 13,362 5,538 HICO Victory Center LP 16,045 15,069 — — 15,353 14,801 10,373 10,003 Charlotte Gateway Village, LLC 109,675 112,553 — — 106,651 109,666 6,718 8,225 Terminus Office Holdings LLC — 258,060 — 198,732 — 50,539 — 48,571 Wildwood Associates 11,061 11,157 — — 10,978 11,108 (521 ) (1) (460 ) (1) Crawford Long - CPI, LLC 28,459 26,429 67,947 69,522 (40,250 ) (44,146 ) (19,205 ) (1) (21,071 ) (1) Other 8,879 6,359 — — 7,318 6,023 4,113 3,841 $ 658,303 $ 779,204 $ 165,039 $ 342,892 $ 354,404 $ 338,427 $ 114,158 $ 140,376 Total Revenues Net Income (Loss) Company's Share of Net Income (Loss) SUMMARY OF OPERATIONS 2019 2018 2017 2019 2018 2017 2019 2018 2017 Charlotte Gateway Village, LLC $ 27,708 $ 26,932 $ 26,465 $ 10,285 $ 10,285 $ 9,528 $ 5,143 $ 5,143 $ 4,764 DC Charlotte Plaza LLLP 15,636 — 2 5,894 — 2 2,947 (1 ) 1 Terminus Office Holdings LLC 34,964 44,429 43,959 4,962 5,506 6,307 2,381 2,755 3,153 Crawford Long - CPI, LLC 12,664 12,383 12,079 3,897 3,446 3,171 1,866 1,641 1,572 HICO Victory Center LP 513 400 429 513 400 431 276 219 225 Carolina Square Holdings LP 12,344 10,686 2,701 470 (169 ) (532 ) 133 (275 ) 522 Austin 300 Colorado Project, LP 422 487 — 199 220 — 100 110 — Wildwood Associates — — — (100 ) (1,140 ) (116 ) (50 ) 2,723 (58 ) AMCO 120 WT Holdings, LLC 40 — — (341 ) 38 58 (68 ) — — Other (2) 180 198 25,029 (94 ) (3,234 ) 59,095 (62 ) (91 ) 36,936 $ 104,471 $ 95,515 $ 110,664 $ 25,685 $ 15,352 $ 77,944 $ 12,666 $ 12,224 $ 47,115 (1) Negative balances are included in deferred income on the consolidated balance sheets. (2) Revenues in 2017 primarily relate to a joint venture acquired in the transactions with Parkway Properties, Inc. and sold during the year. Net income and Company's share of net income in 2017 primarily relate to the sale of the Emory Point properties. 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 281,000 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 $1.7 million at December 31, 2019 . Austin 300 Colorado Project, LP ("300 Colorado") – 300 Colorado is a joint venture between the Company, 3C Block 28 Partners, LP ("3CB"), and 3C RR Xylem, LP ("3CRR"), 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. 300 Colorado has a construction loan, secured by the project, whereby it may borrow up to $126 million to fund the construction of the building. The loan had an outstanding balance of $21.4 million at December 31, 2019 . The loan bears interest at LIBOR plus 2.25% and matures on January 17, 2022 . The assets of the venture in the above table include a cash balance of $593,000 at December 31, 2019 . 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 $75.7 million. The loan bears interest at LIBOR plus 1.90% and matures on May 1, 2020 . 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 $4.7 million at December 31, 2019 . AMCO 120 WT Holdings, LLC ("AMCO") – 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 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 assets of the venture in the above table include a cash balance of $49,000 at December 31, 2019 . 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, 2019 , 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 $775,000 at December 31, 2019 . 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. Net income and cash flows are allocated 50% to each partner until the Company receives a 17% internal rate of return; thereafter, cash flows are allocated 80% to BOA and 20% to the Company. In January 2020, the Company entered into an agreement to sell its interest in Gateway to BOA for $52.2 million and is expected to close the sale in the first quarter of 2020. The assets of the venture in the above table include a cash balance of $3.8 million at December 31, 2019 . Terminus Office Holdings LLC ("TOH") – TOH was a 50 - 50 joint venture between the Company and institutional investors advised by J.P. Morgan Asset Management ("JPM"), which owned and operated two office buildings in Atlanta, Georgia. On October 1, 2019 the Company purchased JPM's 50% interest in TOH for $148 million in a transaction that valued Terminus 100 and Terminus 200 at $503 million . As a result, the Company consolidated TOH and recorded the assets and liabilities at fair value. Upon consolidation, the Company recognized a $92.8 million gain on this acquisition achieved in stages and recorded this amount in gain on investment property transactions. 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, 2019 , the Company’s investment in Wildwood was a credit balance of $521,000 . This credit balance resulted from cumulative distributions from Wildwood over time that exceeded the Company’s basis in its contributions, and represents deferred gain not recognized at venture formation. The assets of the venture in the above table include a cash balance of $38,000 at December 31, 2019 . In January 2020, the Company sold substantially all of its remaining interest in Wildwood to IBM for $900,000 and recognized a gain on the sale of $1.4 million , which included recognition of the remaining credit balance of $521,000 . Crawford Long—CPI, LLC ("Crawford Long" ) – Crawford Long is a 50 - 50 joint venture between the Company and Emory University that owns Emory University Hospital Midtown, a 358,000 square foot medical office building located in Atlanta, Georgia. Crawford Long has a $67.9 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 $4.5 million at December 31, 2019 . At December 31, 2019 , the Company's unconsolidated joint ventures had aggregate outstanding indebtedness to third parties of $165.0 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 $7.1 million , $9.3 million , and $7.2 million of development, leasing, and management fees, including salary and expense reimbursements, from unconsolidated joint ventures in 2019 , 2018 , and 2017 , respectively.

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
INTANGIBLE ASSETS	INTANGIBLE ASSETS At December 31, 2019 and 2018 , intangible assets included the following (in thousands): 2019 2018 In-place leases, net of accumulated amortization of $163,867 and $125,130 in 2019 and 2018, respectively $ 202,760 $ 105,964 Above-market tenant leases, net of accumulated amortization of $26,487 and $19,502 in 2019 and 2018, respectively 35,699 20,453 Below-market ground lease, net of accumulated amortization of $897 and $621 in 2019 and 2018, respectively 17,516 17,792 Goodwill 1,674 1,674 $ 257,649 $ 145,883 Aggregate net amortization expense related to intangible assets and liabilities was $45.6 million , $27.0 million , and $42.4 million for the years ended December 31, 2019 , 2018 , and 2017 , 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 2020 $ (19,379 ) $ (46 ) $ 276 $ 8,036 $ 54,126 $ 43,013 2021 (14,201 ) (46 ) 276 6,660 40,134 32,823 2022 (11,065 ) (46 ) 276 5,267 27,944 22,376 2023 (9,365 ) (46 ) 276 4,222 22,724 17,811 2024 (8,080 ) (46 ) 276 3,339 17,827 13,316 Thereafter (19,342 ) (1,443 ) 16,136 8,175 40,005 43,531 $ (81,432 ) $ (1,673 ) $ 17,516 $ 35,699 $ 202,760 $ 172,870 Weighted average remaining lease term 7 years 36 years 65 years 7 years 7 years 10 years The carrying amount of goodwill did not change during the years ended December 31, 2019 and 2018 .

Other Assets

Other Assets	12 Months Ended
	Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
OTHER ASSETS	OTHER ASSETS At December 31, 2019 and 2018 , other assets included the following (in thousands): 2019 2018 Predevelopment costs and earnest money $ 25,586 $ 8,249 Furniture, fixtures and equipment, leasehold improvements, and other deferred costs, net of accumulated depreciation of $29,131 and $25,193 in 2019 and 2018, respectively 17,791 14,942 Prepaid expenses and other assets 5,924 5,087 Lease inducements, net of accumulated amortization of $2,333 and $1,545 in 2019 and 2018, respectively 5,632 4,961 Line of credit deferred financing costs, net of accumulated amortization of $2,952 and $1,451 in 2019 and 2018, respectively 4,516 5,844 $ 59,449 $ 39,083 Predevelopment costs represent amounts that are capitalized related to predevelopment projects that the Company determined are probable of future development. 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.

Notes Payable

Notes Payable	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
NOTES PAYABLE	NOTES PAYABLE The following table summarizes the terms of notes payable outstanding at December 31, 2019 and 2018 (in thousands): Description Interest Rate Maturity 2019 2018 2019 Senior Notes, Unsecured 3.95% 2029 $ 275,000 $ — Credit Facility, Unsecured 2.81% 2023 251,500 — Term Loan, Unsecured 2.96% 2021 250,000 250,000 2017 Senior Notes, Unsecured 3.91% 2025 250,000 250,000 2019 Senior Notes, Unsecured 3.86% 2028 250,000 — Fifth Third Center 3.37% 2026 140,332 143,497 2019 Senior Notes, Unsecured 3.78% 2027 125,000 — Terminus 100 5.25% 2023 118,146 — Colorado Tower 3.45% 2026 117,085 119,427 2017 Senior Notes, Unsecured 4.09% 2027 100,000 100,000 Promenade 4.27% 2022 95,986 99,238 816 Congress 3.75% 2024 79,987 81,676 Terminus 200 3.79% 2023 76,079 — Legacy Union One 4.24% 2023 66,000 — Meridian Mark Plaza 6.00% 2020 22,978 23,524 $ 2,218,093 $ 1,067,362 Unamortized premium 11,239 — Unamortized loan costs (6,357 ) (4,792 ) Total Notes Payable $ 2,222,975 $ 1,062,570 Weighted average maturity of notes payable outstanding at December 31, 2019 was 5.5 years. Credit Facility The Company has a $1 billion senior unsecured line of credit (the "Credit Facility") that matures on January 3, 2023 . The Credit Facility contains financial covenants that require, among other things, the maintenance of an unencumbered interest coverage ratio of at least 1.75 ; a fixed charge coverage ratio of at least 1.50 ; a secured leverage ratio of no more than 40% ; and an overall leverage ratio of no more than 60% . The Credit Facility also contains customary representations and warranties and affirmative and negative covenants, as well as customary events of default. The amounts outstanding under the Credit Facility may be accelerated upon the occurrence of any events of default. The interest rate applicable to the 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, 2019 , the Credit Facility's spread over LIBOR was 1.05% . The amount that the Company may draw under the Credit Facility is a defined calculation based on the Company's unencumbered assets and other factors. The total available borrowing capacity under the Credit Facility was $748.5 million at December 31, 2019 . 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 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 1.00% (the “Base Rate”), plus a spread of between 0.00% and 0.75% , based on leverage. At December 31, 2019 , the Term Loan's spread over LIBOR was 1.20% . Unsecured Senior Notes In June 2019, the Company closed a $650 million private placement of unsecured senior notes, which were issued in three tranches. The first tranche of $125 million has an 8-year maturity and a fixed annual interest rate of 3.78% . The second tranche of $250 million has a 9-year maturity and a fixed annual interest rate of 3.86% . The third tranche of $275 million has a 10-year maturity and a fixed annual interest rate of 3.95% . The Company has two existing tranches of unsecured senior notes, totaling $350 million , that were funded in two tranches. The first tranche of $100 million is due in 2027 and has a fixed annual interest rate of 4.09% . The second tranche of $250 million is due in 2025 and has a fixed annual interest rate of 3.91% . The unsecured senior notes contain financial covenants that require, among other things, the maintenance of an unencumbered interest coverage ratio of at least 1.75 ; a fixed charge coverage ratio of at least 1.50 ; an overall leverage ratio of no more than 60% ; and a secured leverage ratio of no more than 40% . 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 connection with the purchase of its partner's interest in TOH, the Company consolidated TOH and recorded the assets and liabilities as fair value, including the venture's mortgage notes. Terminus 100 has a $118.1 million mortgage note, which is due in 2023 and has a 5.25% fixed rate. Terminus 200 has a $76.1 million mortgage note, which is due in 2023 and has a 3.79% fixed rate. In 2018, the Company repaid in full the $22.2 million The Pointe mortgage note, without penalty. As of December 31, 2019 , the Company had $716.6 million outstanding on eight non-recourse mortgage notes. Assets with depreciated carrying values of $1.1 billion were pledged as security on these mortgage notes payable. In February 2020, the Company prepaid in full the $23.0 million Meridian Mark Plaza mortgage note, without penalty. Debt Associated with the Merger In connection with the Merger, the Company assumed and immediately repaid $679.0 million in unsecured variable rate debt of TIER with proceeds from its Credit Facility. The Company also assumed the Legacy Union One mortgage loan with a $66.0 million principal balance and a fixed interest rate of 4.24% . Subsequent to the Merger, the Company repaid the majority of the Credit Facility borrowings related to the Merger with proceeds from the $650 million private placement of unsecured senior notes discussed above. Other Debt Information At December 31, 2019 and 2018 , the estimated fair value of the Company’s notes payable was $2.3 billion and $1.1 billion , respectively, calculated by discounting the debt's remaining contractual cash flows at estimated rates at which similar loans could have been obtained at December 31, 2019 and 2018 . 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, 2019 , 2018 , and 2017 , interest was recorded as follows (in thousands): 2019 2018 2017 Total interest incurred $ 65,182 $ 44,332 $ 42,767 Interest capitalized (11,219 ) (4,902 ) (9,243 ) Total interest expense $ 53,963 $ 39,430 $ 33,524 Debt Maturities Future principal payments due (including scheduled amortization payments and payments due upon maturity) on the Company's notes payable at December 31, 2019 are as follows (in thousands): 2020 $ 38,699 2021 266,369 2022 102,401 2023 504,655 2024 79,087 Thereafter 1,226,882 $ 2,218,093

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Commitments The Company had no letters of credit outstanding at year end and outstanding performance bonds totaling $1.1 million at December 31, 2019 . As a lessor, the Company had a total of $ 205.4 million in future obligations under leases to fund tenant improvements and other future construction obligations at December 31, 2019 . As a lessee, the Company had future obligations for operating leases other than ground leases of $404,000 at December 31, 2019 . 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, 2019
Equity [Abstract]
STOCKHOLDERS' EQUITY	STOCKHOLDERS' EQUITY In 2019, the Company issued 41.6 million shares of common stock in connection with the Merger. In 2017, the Company issued 6.3 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 300,821 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. As of December 31, 2019 , the Company had 1.7 million shares of limited voting preferred stock outstanding. Each share of limited voting preferred stock has a par value of $1 per share and 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 2019 , 2018 , and 2017 to meet REIT distribution requirements (in thousands): 2019 2018 2017 Common and preferred dividends $ 142,940 $ 107,167 $ 99,138 Dividends treated as taxable compensation (161 ) (150 ) (129 ) Dividends applied to meet current year REIT distribution requirements $ 142,779 $ 107,017 $ 99,009 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, 2019 , 2018 , and 2017 : Total Ordinary Long-Term Unrecaptured Nondividend Distributions AMT Adjustment (2) 2019 $ 1.130000 $ 0.983133 $ 0.146867 $ — $ — $ — 2018 $ 1.020000 $ 1.005584 $ 0.014416 $ — $ — $ — 2017 $ 0.960000 $ 0.373248 $ 0.586752 $ 0.282088 $ — $ 0.071024 (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.

Revenue Recognition

Revenue Recognition	12 Months Ended
	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
REVENUE RECOGNITION	REVENUE RECOGNITION The Company categorizes its primary sources of revenue into revenue from contracts with customers and other revenue accounted for as leases under ASC 842 as follows: • Rental property revenues consist 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; (4) termination fees; and (5) the reimbursement of the tenants' share of real estate taxes, insurance, and other operating expenses. The Company's leases typically include renewal options and are classified and accounted for as operating leases. Rental property revenues are accounted for in accordance with the guidance set forth in ASC 842. • Fee income consists of development fees, management fees, and leasing fees earned from unconsolidated joint ventures and from third parties. Fee income is accounted for in accordance with the guidance set forth in ASC 606. For the years ended December 31, 2019 , 2018 , and 2017 , the Company recognized rental property revenues of $628.8 million, $463.4 million , and $455.3 million , respectively, of which $176.6 million, $119.3 million , and $115.9 million , respectively, represented variable rental revenue. For the years ended December 31, 2019 , 2018 , and 2017 , the Company recognized fee and other revenue of $28.8 million, $11.8 million , and $10.9 million , respectively. The following tables set forth the future minimum rents to be received by consolidated entities under existing non-cancellable leases as of December 31, 2019 , accounted for in accordance with ASC 842 and as of December 31, 2018 , accounted for in accordance with ASC 840, respectively (in thousands): December 31, 2019 2020 $ 502,147 2021 487,815 2022 438,624 2023 401,363 2024 365,024 Thereafter 1,358,674 $ 3,553,647 December 31, 2018 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, 2019
Share-based Payment Arrangement [Abstract]
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION On April 23, 2019, the Company's stockholders approved the Cousins Properties Incorporated 2019 Omnibus Incentive Stock Plan (the "2019 Plan") which allows the Company to issue awards of stock options, stock grants, or stock appreciation rights to employees and directors. The 2019 Plan also allows the Company to issue awards to employees that are paid in cash or stock on the vesting date in an amount equal to the fair market value, as defined, of one share of the Company’s stock. As of December 31, 2019 , 3,714,993 shares were authorized to be awarded pursuant to the 2019 Plan. The Company also maintains the Cousins Properties Incorporated 2009 Incentive Stock Plan (the "2009 Plan") and the Cousins Properties Incorporated 2005 Restricted Stock Unit Plan (the “RSU Plan”), as amended, although no further issuances are permitted under the 2009 Plan or RSU Plan. Information on stock options, restricted stock, and restricted stock units granted to employees and directors is discussed below. Stock Options At December 31, 2019 , the Company had 66,999 stock options outstanding to key employees and outside directors, which are exercisable for common stock, all of which are fully vested. In 2019 , 2018 , and 2017 , there were no stock option grants to employees or directors, and the Company recognized no compensation expense related to stock options. During 2019 , the Company issued 10,451 shares for option exercises. During 2018, the Company issued 11,827 shares and paid $945,000 for option exercises. As of December 31, 2019 , the intrinsic value of the options outstanding and exercisable was $1.2 million . 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, 2019 and 2018 , the weighted-average contractual lives for the options outstanding and exercisable were 0.6 years and 1.1 years, respectively. The following is a summary of stock option activity for the years ended December 31, 2019 , 2018 , and 2017 (options in thousands): Number of Options Weighted Average Exercise Price Per Option Outstanding at December 31, 2016 565 $ 43.28 Exercised (144 ) 30.04 Forfeited/Expired (189 ) 73.88 Outstanding at December 31, 2017 232 26.36 Exercised (114 ) 26.40 Forfeited/Expired (4 ) 74.88 Outstanding at December 31, 2018 114 24.00 Exercised (42 ) 25.59 Forfeited/Expired (5 ) 25.32 Outstanding at December 31, 2019 67 $ 23.13 Options Exercisable at December 31, 2019 67 $ 23.13 Restricted Stock In 2019 , 2018 , and 2017 , the Company issued 65,824 , 78,799 , and 77,072 shares, respectively, of restricted stock to employees, which vest ratably over three years from the issuance date. In 2019 , 2018 , and 2017 , the Company also issued 37,166 , 29,638 , and 30,219 shares, respectively, 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 $2.5 million , $2.3 million , and $2.0 million in 2019 , 2018 , and 2017 , respectively. As of December 31, 2019 , the Company had $2.7 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 2019 , 2018 , and 2017 was $2.6 million , $2.3 million , and $2.0 million , respectively. The following table summarizes restricted stock activity for the years ended December 31, 2019 , 2018 , and 2017 (shares in thousands): Number of Shares Weighted-Average Grant Date Fair Value Non-vested restricted stock at December 31, 2016 117 $ 30.28 Granted 77 34.52 Vested (53 ) 30.00 Forfeited (2 ) 26.12 Non-vested restricted stock at December 31, 2017 139 31.72 Granted 78 34.04 Vested (64 ) 31.32 Forfeited (5 ) 32.88 Non-vested restricted stock at December 31, 2018 148 33.08 Granted 66 35.64 Vested (72 ) 34.09 Forfeited (1 ) 34.46 Non-vested restricted stock at December 31, 2019 141 $ 34.81 Restricted Stock Units During 2019 , 2018 , and 2017 , 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, 2019 are 92,649 , 110,488 , and 94,845 related to the 2019 , 2018 , and 2017 grants, respectively. The following table summarizes the performance-based RSU activity for the years ended December 31, 2019 , 2018 , and 2017 (in thousands): Outstanding at December 31, 2016 318 Granted 100 Vested (144 ) Forfeited (3 ) Outstanding at December 31, 2017 271 Granted 113 Vested (75 ) Forfeited (9 ) Outstanding at December 31, 2018 300 Granted 93 Vested (94 ) Forfeited (1 ) Outstanding at December 31, 2019 298 During 2019 , 2018 , and 2017 , the Company granted 42,809 , 4,459 , and 66,181 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. For the 2018 and 2017 time-vested RSU grants, these dividend payments have been and will continue to be made concurrently with the payment of common dividends. For the 2019 time-vested RSU grants, dividend equivalent units will be paid out at the time of vesting. The Company estimates future expense for all types of RSUs outstanding at December 31, 2019 to be $6.5 million (using stock prices and estimated target percentages as of December 31, 2019 ), which will be recognized over a weighted-average period of 1.1 years. During 2019 , total cash paid for all types of RSUs and related dividend payments was $6.1 million . During 2019 , 2018 , and 2017 , $9.9 million , $4.6 million , and $7.0 million , respectively, was recognized as compensation expense related to RSUs.

Retirement Savings Plan

Retirement Savings Plan	12 Months Ended
	Dec. 31, 2019
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 to participate in 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, and employees vested in Company contributions over a three -year period. On January 1, 2019, the Company began contributing 3% of an employee's eligible compensation to the plan, which is 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 $ 913,000 , $647,000 , and $764,000 to the Retirement Savings Plan for the 2019 , 2018 , and 2017 plan years, respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
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): 2019 2018 2017 Amount Rate Amount Rate Amount Rate Federal income tax benefit (expense) $ (65 ) (21 )% $ 143 21 % $ 47 35 % State income tax benefit (expense), net of federal income tax effect (12 ) (4 )% 27 4 % 5 4 % Deferred tax adjustment 127 41 % Change in deferred tax assets as a result of change in tax law — — % — — % (340 ) (254 )% Valuation allowance (45 ) (15 )% (174 ) (26 )% 283 211 % Other (5 ) (1 )% 4 1 % 5 4 % 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, 2019 and 2018 are as follows (in thousands): 2019 2018 Income from unconsolidated joint ventures $ 27 $ 18 Federal and state tax carryforwards 702 763 Other 99 2 Total deferred tax assets 828 783 Valuation allowance (828 ) (783 ) 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, 2019 and 2018 the deferred tax asset of CTRS equaled $828,000 and $783,000 , 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, 2019 and 2018

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2019
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, 2019 , 2018 and 2017 (in thousands, except per share amounts): Year Ended December 31 2019 2018 2017 Earnings per common share - basic: Numerator: Net income $ 152,683 $ 80,765 $ 219,959 Net income attributable to noncontrolling interests in CPLP (1,952 ) (1,345 ) (3,681 ) Net income attributable to other noncontrolling interests (313 ) (256 ) (3 ) Net income available for common stockholders $ 150,418 $ 79,164 $ 216,275 Denominator: Weighted average common shares - basic 128,060 105,076 103,902 Net income per common share - basic $ 1.17 $ 0.75 $ 2.08 Earnings per common share - diluted: Numerator: Net income $ 152,683 $ 80,765 $ 219,959 Net income attributable to other noncontrolling interests (313 ) (256 ) (3 ) Net income available for common stockholders before net income attributable to noncontrolling interests in CPLP $ 152,370 $ 80,509 $ 219,956 Denominator: Weighted average common shares - basic 128,060 105,076 103,902 Add: Potential dilutive common shares - stock options 27 48 78 Weighted average units of CPLP convertible into common shares 1,744 1,744 1,844 Weighted average common shares - diluted 129,831 106,868 105,824 Net income per common share - diluted $ 1.17 $ 0.75 $ 2.08 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 , the number of anti-dilutive stock options was 6,000 , respectively. There were no anti-dilutive stock options outstanding as of December 31, 2019 and 2018 .

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows - Supplemental Information	12 Months Ended
	Dec. 31, 2019
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, 2019 , 2018 , and 2017 is as follows (in thousands): 2019 2018 2017 Interest paid, net of amounts capitalized $ 38,062 $ 43,166 $ 30,572 Income taxes paid — — — Non-Cash Transactions: Non-cash assets and liabilities assumed in TIER transaction 1,512,373 — — Transfer from operating properties and related liabilities to assets and liabilities of real estate assets held for sale 318,516 — — Ground lease right-of-use assets and associated liabilities 56,294 — — Transfer from investment in unconsolidated joint venture to operating properties 50,781 — 68,498 Common stock dividends declared and accrued 42,559 27,326 25,202 Change in accrued property acquisition, development, and tenant asset expenditures 4,891 (18,104 ) 5,965 Non-cash consideration for property acquisition 10,071 — — Transfer from projects under development to operating properties — 325,490 58,928 Cumulative effect of change in accounting principle — 22,329 — Transfer from investment in unconsolidated joint ventures to projects under development — 7,025 — 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, 2019 2018 2017 Cash and cash equivalents $ 15,603 $ 2,547 $ 148,929 Restricted cash 2,005 148 56,816 Total cash, cash equivalents, and restricted cash $ 17,608 $ 2,695 $ 205,745

Reportable Segments

Reportable Segments	12 Months Ended
	Dec. 31, 2019
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, Austin, Charlotte, Phoenix, Tampa, Dallas, Orlando, and Other. 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 termination fee income, 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 net income available to common stockholders to NOI is as follows (in thousands): Year Ended December 31, 2019 Office Mixed-Use Total Net Operating Income: Atlanta $ 158,093 $ (48 ) $ 158,045 Austin 93,311 — 93,311 Charlotte 77,082 — 77,082 Phoenix 37,247 — 37,247 Tampa 33,586 — 33,586 Dallas 7,473 — 7,473 Other 21,939 3,107 25,046 Total Net Operating Income $ 428,731 $ 3,059 $ 431,790 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 The following reconciles Net Income to Net Operating Income for each of the periods presented (in thousands): Year Ended December 31, 2019 2018 2017 Net income $ 152,683 $ 80,765 $ 219,959 Net operating income from unconsolidated joint ventures 32,413 28,888 31,053 Fee income (28,518 ) (10,089 ) (8,632 ) Termination fee income (7,228 ) (1,548 ) (9,270 ) Other income (246 ) (1,722 ) (2,248 ) Reimbursed expenses 4,004 3,782 3,527 General and administrative expenses 37,007 22,040 27,523 Interest expense 53,963 39,430 33,524 Depreciation and amortization 257,149 181,382 196,745 Acquisition and transaction costs 52,881 248 1,661 Other expenses 1,109 556 1,796 Gain on extinguishment of debt — (8 ) (2,258 ) Income from unconsolidated joint ventures (12,666 ) (12,224 ) (47,115 ) Gain on sale of investment properties (110,761 ) (5,437 ) (133,059 ) Net Operating Income $ 431,790 $ 326,063 $ 313,206 Revenues by reportable segment, including a reconciliation to total rental property revenues on the consolidated statements of operations for years ended December 31, 2019 , 2018 , and 2017 are as follows (in thousands): Year Ended December 31, 2019 Office Mixed-Use Total Revenues: Atlanta $ 242,209 $ 8 $ 242,217 Austin 160,196 — 160,196 Charlotte 120,214 — 120,214 Tampa 54,216 — 54,216 Phoenix 51,586 — 51,586 Dallas 9,421 — 9,421 Other 38,732 4,630 43,362 Total segment revenues 676,574 4,638 681,212 Less: Company's share of rental property revenues from unconsolidated joint ventures (47,823 ) (4,638 ) (52,461 ) Total rental property revenues $ 628,751 $ — $ 628,751 Year Ended December 31, 2018 Office Mixed-Use Total Revenues: Atlanta $ 206,692 $ — $ 206,692 Austin 104,817 — 104,817 Charlotte 92,398 — 92,398 Phoenix 51,238 — 51,238 Tampa 49,822 — 49,822 Other 2,207 3,724 5,931 Total segment revenues 507,174 3,724 510,898 Less: Company's share of rental property revenues from unconsolidated joint ventures (43,773 ) (3,724 ) (47,497 ) Total rental property revenues $ 463,401 $ — $ 463,401 Year Ended December 31, 2017 Office Mixed-Use Total Revenues: Atlanta $ 180,497 $ 5,237 $ 185,734 Austin 101,222 — 101,222 Charlotte 92,242 — 92,242 Phoenix 51,209 — 51,209 Tampa 47,402 — 47,402 Orlando 24,973 — 24,973 Other 3,053 999 4,052 Total segment revenues 500,598 6,236 506,834 Less: Company's share of rental property revenues from unconsolidated joint ventures (45,293 ) (6,236 ) (51,529 ) Total rental property revenues $ 455,305 $ — $ 455,305

Real Estate and Accumulated Dep

Real Estate and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2019
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, 2019 ($ 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 The Domain $ — $ 52,511 $ 617,001 $ — $ 3,958 $ 52,511 $ 620,959 $ 673,470 $ 10,996 — 2019 40 years Austin, TX Terminus 194,225 49,345 410,826 — 6,592 49,345 417,418 466,763 4,028 — 2019 40 years Atlanta, GA Northpark — 22,350 295,825 — 66,375 22,350 362,200 384,550 70,498 — 2014 39 years Atlanta, GA Corporate Center — 7,298 272,148 17,566 47,407 24,864 319,555 344,419 39,254 — 2016 40 years Tampa, FL Spring & 8th — 28,131 — 426 301,596 28,557 301,596 330,153 19,008 2015 2015 40 years Atlanta, GA Hayden Ferry — 13,102 262,578 (252 ) 24,476 12,850 287,054 299,904 38,320 — 2016 40 years Phoenix, AZ Buckhead Plaza — 35,064 234,111 — 10,070 35,064 244,181 279,245 30,028 — 2016 40 years Atlanta, GA The Terrace — 27,360 247,226 — 2,571 27,360 249,797 277,157 4,992 — 2019 40 years Austin, TX One Eleven Congress — 33,841 201,707 — 30,938 33,841 232,645 266,486 26,574 — 2016 40 years Austin, TX Bank of America Plaza — 32,091 229,840 (147 ) 4,059 31,944 233,899 265,843 8,030 — 2019 40 years Charlotte, NC Briarlake Plaza — 33,486 196,915 — 2,855 33,486 199,770 233,256 4,692 — 2019 40 years Houston, TX Fifth Third Center 140,332 22,591 180,430 — 21,404 22,591 201,834 224,425 39,706 — 2014 40 years Charlotte, NC San Jacinto Center — 34,068 176,535 (579 ) 14,237 33,489 190,772 224,261 20,507 — 2016 40 years Austin, TX 3344 Peachtree — 16,110 176,153 — 20,425 16,110 196,578 212,688 23,418 — 2016 40 years Atlanta, GA Promenade 95,986 13,439 102,790 — 47,224 13,439 150,014 163,453 55,183 — 2011 34 years Atlanta, GA 816 Congress $ 79,987 $ 6,817 $ 89,891 $ 20,682 $ 27,198 $ 27,499 $ 117,089 $ 144,588 $ 30,234 — 2013 42 years Austin, TX Colorado Tower 117,085 1,600 — 20,607 120,902 22,207 120,902 143,109 31,909 2013 2013 30 years Austin, TX Legacy Union One 66,000 13,049 128,740 — — 13,049 128,740 141,789 2,679 — 2019 40 years Dallas, GA 3350 Peachtree — 16,836 108,177 — 9,276 16,836 117,453 134,289 14,086 — 2016 40 years Atlanta, GA Burnett Plaza — 28,756 90,104 (281 ) 1,611 28,475 91,715 120,190 2,633 — 2019 40 years Fort Worth, TX NASCAR Plaza — 51 115,238 — 3,213 51 118,451 118,502 15,325 — 2016 40 years Charlotte, NC Tempe Gateway — 5,893 95,130 — 6,542 5,893 101,672 107,565 12,089 — 2016 40 years Phoenix, AZ Domain Point — 17,349 71,599 — 236 17,349 71,835 89,184 1,725 — 2019 40 years Austin, TX 1200 Peachtree — 19,495 62,836 — — 19,495 62,836 82,331 1,333 — 2019 40 years Atlanta, GA 111 West Rio — 6,076 56,647 (127 ) 16,964 5,949 73,611 79,560 7,271 — 2017 40 years Phoenix, AZ 3348 Peachtree — 6,707 69,723 — 2,412 6,707 72,135 78,842 9,584 — 2016 40 years Atlanta, GA 8000 Avalon — 4,130 — 72 72,953 4,202 72,953 77,155 7,177 2016 2016 40 years Atlanta, GA 5950 Sherry Lane — 8,040 65,919 — 1,077 8,040 66,996 75,036 1,481 — 2019 40 years Dallas, GA The Pointe — 9,404 54,694 — 5,954 9,404 60,648 70,052 8,881 — 2016 40 years Tampa, FL Harborview Plaza — 10,800 39,136 — 7,979 10,800 47,115 57,915 5,767 — 2016 40 years Tampa, FL Research Park V — 4,373 — 801 42,390 5,174 42,390 47,564 7,798 2014 1998 30 years Austin, TX Meridian Mark Plaza 22,978 2,219 — — 30,500 2,219 30,500 32,719 21,933 1997 1997 30 years Atlanta, GA Total Operating Properties 716,593 582,382 4,651,919 58,768 953,394 641,150 5,605,313 6,246,463 577,139 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) HELD FOR SALE Hearst Tower $ — $ 9,977 $ 323,299 $ — $ 28,455 $ 9,977 $ 351,754 $ 361,731 $ 44,478 2013 2013 Charlotte, NC Woodcrest — 2,280 18,636 — 2,002 2,280 20,638 22,918 — — 2019 Cherry Hill, NJ Total Properties Held for Sale — 12,257 341,935 — 30,457 12,257 372,392 384,649 44,478 PROJECTS UNDER DEVELOPMENT Domain 12 — 12,725 138,148 — 21,100 12,725 159,248 171,973 — 2019 2019 Austin, TX Domain 10 — 11,975 101,565 — 35,012 11,975 136,577 148,552 — 2019 2019 Austin, TX 10000 Avalon — 5,819 — 3 83,750 5,822 83,750 89,572 — 2018 2016 Suburban Atlanta, GA Total Projects Under Development — 30,519 239,713 3 139,862 30,522 379,575 410,097 — LAND Legacy Union 2 & 3 — 22,724 — — — 22,724 — 22,724 — — 2019 Dallas, GA Domain 14 & 15 — 21,000 — — — 21,000 — 21,000 — — 2019 Austin, TX 100 Mill — 19,506 — — — 19,506 — 19,506 — — 2018 Phoenix, AZ Domain 9 — 16,640 — — — 16,640 — 16,640 — — 2019 Austin, TX 901 West Peachtree — 11,883 — 3,741 — 15,624 — 15,624 — — 2018 Atlanta, GA 3354 Peachtree — 13,410 — — — 13,410 — 13,410 — — 2019 Atlanta, GA Burnett Plaza - Adjacent Land — 3,900 — — — 3,900 — 3,900 — — 2019 Fort Worth, TX The Avenue Forsyth - Adjacent Land — 11,240 — (7,540 ) — 3,700 — 3,700 — — 2007 Suburban Atlanta, GA Corporate Center 5 — — — 356 — 356 — 356 — — 2019 Tampa, FL Total Commercial Land — 120,303 — (3,443 ) — 116,860 — 116,860 — Total Properties $ 716,593 $ 745,461 $ 5,233,567 $ 55,328 $ 1,123,713 $ 800,789 $ 6,357,280 $ 7,158,069 $ 621,617 COUSINS PROPERTIES INCORPORATED AND SUBSIDIARIES REAL ESTATE AND ACCUMULATED DEPRECIATION December 31, 2019 (in thousands) NOTES: (a) Reconciliations of total real estate carrying value and accumulated depreciation for the three years ended December 31, 2019 are as follows: Real Estate Accumulated Depreciation 2019 2018 2017 2019 2018 2017 Balance at beginning of period $ 4,121,286 $ 3,893,799 $ 3,814,986 $ 421,495 $ 275,977 $ 215,856 Additions during the period: TIER merger 2,222,989 — — — — — Acquisitions 542,502 48,920 62,723 — — — Improvements and other capitalized costs 271,720 178,567 303,940 — — — Depreciation expense — — — 200,122 145,518 101,720 Total Additions 3,037,211 227,487 366,663 200,122 145,518 101,720 Deductions during the period: Cost of real estate sold (428 ) — (287,850 ) — — (41,599 ) Total Deductions (428 ) — (287,850 ) — — (41,599 ) Balance at end of period $ 7,158,069 $ 4,121,286 $ 3,893,799 $ 621,617 $ 421,495 $ 275,977 (b) The aggregate cost for federal income tax purposes, net of depreciation, was $4.9 billion (unaudited) at December 31, 2019 . (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, 2019
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. On June 14, 2019, the Company restated and amended its articles of incorporation to effect a reverse stock split of the issued and outstanding shares of its common and preferred stock pursuant to which (1) each four shares of the Company's issued and outstanding common stock were combined into one share of the Company's common or preferred stock, respectively, and (2) the authorized number of the Company's common stock was proportionally reduced to 175 million shares. Fractional shares of common stock resulting from the reverse stock split were settled in cash. Preferred stock was redeemed with each four shares combined into one share; fractional shares of preferred stock were redeemed without payout. Immediately thereafter, the Company further amended its articles of incorporation to increase the number of authorized shares of its common stock from 175 million to 300 million shares. All shares of common stock, stock options, restricted stock units, and per share information presented in the consolidated financial statements have been adjusted to reflect the reverse stock split on a retroactive basis for all periods presented. For the three years ended December 31, 2019 , there were no items of other comprehensive income. Therefore, the Company did not present comprehensive income. Additionally, certain subtotals within the consolidated statements of operations for the years ended December 31, 2018 and 2017 were removed to conform to the current period presentation. On January 1, 2019, the Company began recording lease termination fees in rental property revenues on the consolidated statements of operations as a result of the adoption of Accounting Standards Update ("ASU") 2016-02, "Leases," ("ASC 842"). The prior period amounts, which were included in other revenues, were reclassified to conform to the current period presentation.
Recently Issued Accounting Standards	Recently Issued Accounting Standards : On January 1, 2019, the Company adopted ASC 842, which amended the previous standard for lease accounting by requiring lessees to record most leases on their balance sheets and by making targeted changes to lessor accounting and reporting. The new standard requires lessees to record a right-of-use asset and a lease liability for leases 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. The classification of the leases determines 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). The new standard also revised the treatment of indirect leasing costs and permits the capitalization and amortization of direct leasing costs only. For the years ended December 31, 2018 and 2017, the Company capitalized $3.8 million and $3.0 million of indirect leasing costs, respectively. The Company adopted the following optional practical expedients provided in ASC 842: • no reassessment of any expired or existing contracts to determine if they contain a lease; • no reassessment of initial direct costs for any existing leases; • no recognition of right-of-use assets and lease liabilities for leases with a term of one year or less; • no separate classification and disclosure of non-lease components of revenue in lease contracts from the related lease components provided certain conditions are met; and • no reassessment of the lease classification. For those leases where the Company was the lessee, specifically ground leases, the adoption of ASC 842 required the Company to record a right-of-use asset and a lease liability in the amount of $56.3 million on the condensed consolidated balance sheet. In calculating the right of use asset and lease liability, the Company used a weighted average discount rate of 4.49% , which represented the Company's incremental borrowing rate related to the ground lease assets as of January 1, 2019. Ground leases executed before the adoption of ASC 842 are accounted for as operating leases and did not result in a materially different ground lease expense. However, most 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, resulting in higher expense associated with the ground lease in the earlier years of a ground lease when compared to the straight line method. The Company used the "modified retrospective" method upon adoption of ASC 842, which permitted application of the new standard on the adoption date as opposed to the earliest comparative period presented in its financial statements. For additional disclosures, see note 6 "Leases" and note 14 "Revenue Recognition" On January 1, 2018, the Company adopted ASU 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"). 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.
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. 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, 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 evaluates all real estate acquisitions to determine if the transactions qualify as an acquisition of assets or of a business within the framework of ASU 2017-01 and guidance in ASC 805. If the Company determines that substantially all of the fair value is concentrated in a single identifiable asset or group of similar assets, the Company will account for the acquisition as an acquisition of assets and not a business. If the Company determines that there is no single or group of assets that make up substantially all of the fair value of assets acquired, the Company must determine whether the acquired set of assets includes an input and substantial processes which create an output. Based on the facts of the transactions and guidance in ASC 805, if the Company determines that an input and substantial processes that create an output are present, the Company will account for the acquisition as an acquisition of a business. For acquisitions that are accounted for as an acquisition of an asset, the Company records the acquired tangible and intangible assets and assumed liabilities based on each asset and liability's relative fair value at the acquisition date to the total purchase price plus capitalized acquisition costs. For acquisitions that are accounted for as an acquisition of a business, the Company records the acquired tangible and intangible assets and assumed liabilities 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.
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, if any, 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. The Company records the costs of the tenant improvements, including costs paid for or reimbursed by the tenants, as an asset. The Company records deferred revenue for the portion of tenant improvements funded or reimbursed by tenants and amortizes this amount on a straight-line basis into rental income over the term of the related lease. As of December 31, 2019 and 2018, the Company had unamortized deferred income related to tenant funded tenant improvements of $17.8 million and $16.2 million, respectively, included in deferred income on the consolidated balance sheets. Certain 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 2019 , 2018 , and 2017 , the Company recognized $122.4 million , $79.8 million , and $67.2 million , respectively, in revenues 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 Investment Property Transactions : Through December 31, 2017, 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. Beginning January 1, 2018, in connection with the 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 or 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 The Company has elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). To qualify as a REIT, the Company 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 the Company's REIT status. As a REIT, the Company generally will not be subject to federal income tax at the corporate level on the taxable income it distributes to its stockholders. If the Company 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. The Company 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	Earnings per Share 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
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, Austin, Charlotte, Phoenix, Tampa, Dallas, Orlando, and Other. 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 termination fee income, 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.

Transactions With Tier Reit, _2

Transactions With Tier Reit, Inc. (Tables)	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Schedule of purchase price allocation	The purchase price was allocated as follows (in thousands): Real estate assets $ 2,202,073 Real estate assets held for sale 20,835 Cash and cash equivalents 84,042 Restricted cash 1,947 Notes and other receivables 8,278 Investment in unconsolidated joint ventures 331 Intangible assets 141,184 Other assets 10,040 2,468,730 Notes payable 747,549 Accounts payable and accrued expenses 53,321 Deferred income 8,388 Intangible liabilities 47,988 Other liabilities 7,793 Nonredeemable noncontrolling interests 5,329 870,368 Total purchase price $ 1,598,362
Unaudited supplemental pro forma information	The supplemental pro forma information is not necessarily indicative of future results, or of actual results, that would have been achieved had the Merger been consummated at the beginning of the period. Year ended December 31, 2019 2018 (unaudited, in thousands) Revenues $ 750,080 $ 702,463 Net income 232,136 28,064 Net income available to common stockholders 229,503 27,742

Real Estate Transactions (Table

Real Estate Transactions (Tables)	12 Months Ended
	Dec. 31, 2019
Real Estate [Abstract]
Properties sold that qualify as discontinued operations	The Company had no dispositions of operating properties in 2019 or 2018 . The Company sold the following properties in 2017 ($ in thousands): Property Property Type Location Square Feet Sales Price 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
Schedule of assets and liabilities of properties held for sale	The major classes of assets and liabilities of these properties held for sale were as follows (in thousands): Real estate assets and other assets held for sale Operating properties, net of accumulated depreciation of $44,478 $ 340,171 Notes and accounts receivable 5,520 Deferred rents receivable 5,745 Intangible assets, net of accumulated amortization of $16,615 8,657 Other assets 489 $ 360,582 Liabilities of real estate assets held for sale Accounts payable and accrued expenses $ 12,497 Deferred income 2,638 Intangible liabilities, net of accumulated amortization of $7,771 5,471 Other liabilities 625 $ 21,231
Schedule of property acquired	The Company accounted for these transactions as an acquisition of assets and the following table summarizes the allocation of the purchase price of these properties (in thousands): 1200 Peachtree Terminus Tangible assets: Building and improvements $ 62,836 $ 410,826 Land and improvements 19,495 49,345 Tangible assets 82,331 460,171 Intangible assets: In-place leases 9,969 24,674 Above market leases — 7,193 Intangible assets 9,969 31,867 Intangible liabilities: Below market leases — 4,745 Intangible liabilities — 4,745 Total net assets acquired $ 92,300 $ 487,293

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Schedule of Future Minimum Payments on Operating Ground Leases, ASC 842	The following table represents the undiscounted cash flows of our scheduled obligations for future minimum payments for ground leases as of December 31, 2019 , with a reconciliation of these cash flows to the related ground lease liabilities in accordance with ASC 842 (in thousands): Operating Ground Leases Finance Ground Leases 2020 $ 3,175 $ 462 2021 2,959 6,562 2022 2,672 162 2023 2,614 162 2024 2,497 162 Thereafter 200,107 3,676 $ 214,024 $ 11,186 Discount (154,645 ) (1,456 ) Lease liability $ 59,379 $ 9,730
Schedule of Future Minimum Payments on Finance Ground Leases, ASC 842	The following table represents the undiscounted cash flows of our scheduled obligations for future minimum payments for ground leases as of December 31, 2019 , with a reconciliation of these cash flows to the related ground lease liabilities in accordance with ASC 842 (in thousands): Operating Ground Leases Finance Ground Leases 2020 $ 3,175 $ 462 2021 2,959 6,562 2022 2,672 162 2023 2,614 162 2024 2,497 162 Thereafter 200,107 3,676 $ 214,024 $ 11,186 Discount (154,645 ) (1,456 ) Lease liability $ 59,379 $ 9,730
Schedule of Future Minimum Payments on Operating Ground Leases, ASC 840	The following table represents undiscounted cash flows of our scheduled obligations for future minimum payments on ground leases as of December 31, 2018, in accordance with ASC 840 (in thousands): Operating Ground Leases Finance Ground Leases 2019 $ 2,441 $ 462 2020 2,460 462 2021 2,497 6,562 2022 2,497 162 2023 2,497 162 Thereafter 202,603 3,838 $ 214,995 $ 11,648
Schedule of Future Minimum Payments on Finance Ground Leases, ASC 840	The following table represents undiscounted cash flows of our scheduled obligations for future minimum payments on ground leases as of December 31, 2018, in accordance with ASC 840 (in thousands): Operating Ground Leases Finance Ground Leases 2019 $ 2,441 $ 462 2020 2,460 462 2021 2,497 6,562 2022 2,497 162 2023 2,497 162 Thereafter 202,603 3,838 $ 214,995 $ 11,648

Notes and Accounts Receivable (

Notes and Accounts Receivable (Tables)	12 Months Ended
	Dec. 31, 2019
Receivables [Abstract]
Components of notes and accounts receivables	At December 31, 2019 and 2018 , notes and accounts receivables included the following (in thousands): 2019 2018 Notes receivable $ 356 $ 453 Tenant and other receivables 23,324 13,368 $ 23,680 $ 13,821

Investment in Unconsolidated _2

Investment in Unconsolidated Joint Ventures (Tables)	12 Months Ended
	Dec. 31, 2019
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, 2019 and 2018 (in thousands). The information included in the summary of operations table is for the years ended December 31, 2019 , 2018 , and 2017 (in thousands). Total Assets Total Debt Total Equity (Deficit) Company's Investment SUMMARY OF FINANCIAL POSITION 2019 2018 2019 2018 2019 2018 2019 2018 DC Charlotte Plaza LLLP $ 179,694 $ 155,530 $ — $ — $ 90,373 $ 88,922 $ 48,058 $ 46,554 Austin 300 Colorado Project, LP 112,630 51,180 21,430 — 68,101 41,298 36,846 22,335 Carolina Square Holdings LP 114,483 106,187 75,662 74,638 25,184 28,844 14,414 16,840 AMCO 120 WT Holdings, LLC 77,377 36,680 — — 70,696 31,372 13,362 5,538 HICO Victory Center LP 16,045 15,069 — — 15,353 14,801 10,373 10,003 Charlotte Gateway Village, LLC 109,675 112,553 — — 106,651 109,666 6,718 8,225 Terminus Office Holdings LLC — 258,060 — 198,732 — 50,539 — 48,571 Wildwood Associates 11,061 11,157 — — 10,978 11,108 (521 ) (1) (460 ) (1) Crawford Long - CPI, LLC 28,459 26,429 67,947 69,522 (40,250 ) (44,146 ) (19,205 ) (1) (21,071 ) (1) Other 8,879 6,359 — — 7,318 6,023 4,113 3,841 $ 658,303 $ 779,204 $ 165,039 $ 342,892 $ 354,404 $ 338,427 $ 114,158 $ 140,376 Total Revenues Net Income (Loss) Company's Share of Net Income (Loss) SUMMARY OF OPERATIONS 2019 2018 2017 2019 2018 2017 2019 2018 2017 Charlotte Gateway Village, LLC $ 27,708 $ 26,932 $ 26,465 $ 10,285 $ 10,285 $ 9,528 $ 5,143 $ 5,143 $ 4,764 DC Charlotte Plaza LLLP 15,636 — 2 5,894 — 2 2,947 (1 ) 1 Terminus Office Holdings LLC 34,964 44,429 43,959 4,962 5,506 6,307 2,381 2,755 3,153 Crawford Long - CPI, LLC 12,664 12,383 12,079 3,897 3,446 3,171 1,866 1,641 1,572 HICO Victory Center LP 513 400 429 513 400 431 276 219 225 Carolina Square Holdings LP 12,344 10,686 2,701 470 (169 ) (532 ) 133 (275 ) 522 Austin 300 Colorado Project, LP 422 487 — 199 220 — 100 110 — Wildwood Associates — — — (100 ) (1,140 ) (116 ) (50 ) 2,723 (58 ) AMCO 120 WT Holdings, LLC 40 — — (341 ) 38 58 (68 ) — — Other (2) 180 198 25,029 (94 ) (3,234 ) 59,095 (62 ) (91 ) 36,936 $ 104,471 $ 95,515 $ 110,664 $ 25,685 $ 15,352 $ 77,944 $ 12,666 $ 12,224 $ 47,115 (1) Negative balances are included in deferred income on the consolidated balance sheets. (2) Revenues in 2017 primarily relate to a joint venture acquired in the transactions with Parkway Properties, Inc. and sold during the year. Net income and Company's share of net income in 2017 primarily relate to the sale of the Emory Point properties.

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of intangible assets	At December 31, 2019 and 2018 , intangible assets included the following (in thousands): 2019 2018 In-place leases, net of accumulated amortization of $163,867 and $125,130 in 2019 and 2018, respectively $ 202,760 $ 105,964 Above-market tenant leases, net of accumulated amortization of $26,487 and $19,502 in 2019 and 2018, respectively 35,699 20,453 Below-market ground lease, net of accumulated amortization of $897 and $621 in 2019 and 2018, respectively 17,516 17,792 Goodwill 1,674 1,674 $ 257,649 $ 145,883
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 2020 $ (19,379 ) $ (46 ) $ 276 $ 8,036 $ 54,126 $ 43,013 2021 (14,201 ) (46 ) 276 6,660 40,134 32,823 2022 (11,065 ) (46 ) 276 5,267 27,944 22,376 2023 (9,365 ) (46 ) 276 4,222 22,724 17,811 2024 (8,080 ) (46 ) 276 3,339 17,827 13,316 Thereafter (19,342 ) (1,443 ) 16,136 8,175 40,005 43,531 $ (81,432 ) $ (1,673 ) $ 17,516 $ 35,699 $ 202,760 $ 172,870 Weighted average remaining lease term 7 years 36 years 65 years 7 years 7 years 10 years

Other Assets (Tables)

Other Assets (Tables)	12 Months Ended
	Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of other assets	At December 31, 2019 and 2018 , other assets included the following (in thousands): 2019 2018 Predevelopment costs and earnest money $ 25,586 $ 8,249 Furniture, fixtures and equipment, leasehold improvements, and other deferred costs, net of accumulated depreciation of $29,131 and $25,193 in 2019 and 2018, respectively 17,791 14,942 Prepaid expenses and other assets 5,924 5,087 Lease inducements, net of accumulated amortization of $2,333 and $1,545 in 2019 and 2018, respectively 5,632 4,961 Line of credit deferred financing costs, net of accumulated amortization of $2,952 and $1,451 in 2019 and 2018, respectively 4,516 5,844 $ 59,449 $ 39,083

Notes Payable (Tables)

Notes Payable (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Summary of terms of notes payable	The following table summarizes the terms of notes payable outstanding at December 31, 2019 and 2018 (in thousands): Description Interest Rate Maturity 2019 2018 2019 Senior Notes, Unsecured 3.95% 2029 $ 275,000 $ — Credit Facility, Unsecured 2.81% 2023 251,500 — Term Loan, Unsecured 2.96% 2021 250,000 250,000 2017 Senior Notes, Unsecured 3.91% 2025 250,000 250,000 2019 Senior Notes, Unsecured 3.86% 2028 250,000 — Fifth Third Center 3.37% 2026 140,332 143,497 2019 Senior Notes, Unsecured 3.78% 2027 125,000 — Terminus 100 5.25% 2023 118,146 — Colorado Tower 3.45% 2026 117,085 119,427 2017 Senior Notes, Unsecured 4.09% 2027 100,000 100,000 Promenade 4.27% 2022 95,986 99,238 816 Congress 3.75% 2024 79,987 81,676 Terminus 200 3.79% 2023 76,079 — Legacy Union One 4.24% 2023 66,000 — Meridian Mark Plaza 6.00% 2020 22,978 23,524 $ 2,218,093 $ 1,067,362 Unamortized premium 11,239 — Unamortized loan costs (6,357 ) (4,792 ) Total Notes Payable $ 2,222,975 $ 1,062,570 Weighted average maturity of notes payable outstanding at December 31, 2019 was 5.5 years.
Summary of interest recorded	For the years ended December 31, 2019 , 2018 , and 2017 , interest was recorded as follows (in thousands): 2019 2018 2017 Total interest incurred $ 65,182 $ 44,332 $ 42,767 Interest capitalized (11,219 ) (4,902 ) (9,243 ) Total interest expense $ 53,963 $ 39,430 $ 33,524
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, 2019 are as follows (in thousands): 2020 $ 38,699 2021 266,369 2022 102,401 2023 504,655 2024 79,087 Thereafter 1,226,882 $ 2,218,093

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Summary of distribution of taxable income	The following reconciles dividends paid and dividends applied in 2019 , 2018 , and 2017 to meet REIT distribution requirements (in thousands): 2019 2018 2017 Common and preferred dividends $ 142,940 $ 107,167 $ 99,138 Dividends treated as taxable compensation (161 ) (150 ) (129 ) Dividends applied to meet current year REIT distribution requirements $ 142,779 $ 107,017 $ 99,009
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, 2019 , 2018 , and 2017 : Total Ordinary Long-Term Unrecaptured Nondividend Distributions AMT Adjustment (2) 2019 $ 1.130000 $ 0.983133 $ 0.146867 $ — $ — $ — 2018 $ 1.020000 $ 1.005584 $ 0.014416 $ — $ — $ — 2017 $ 0.960000 $ 0.373248 $ 0.586752 $ 0.282088 $ — $ 0.071024 (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.

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Future minimum rentals to be received under existing non-cancelable leases	he following tables set forth the future minimum rents to be received by consolidated entities under existing non-cancellable leases as of December 31, 2019 , accounted for in accordance with ASC 842 and as of December 31, 2018 , accounted for in accordance with ASC 840, respectively (in thousands): December 31, 2019 2020 $ 502,147 2021 487,815 2022 438,624 2023 401,363 2024 365,024 Thereafter 1,358,674 $ 3,553,647 December 31, 2018 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, 2019
Share-based Payment Arrangement [Abstract]
Stock options activity	The following is a summary of stock option activity for the years ended December 31, 2019 , 2018 , and 2017 (options in thousands): Number of Options Weighted Average Exercise Price Per Option Outstanding at December 31, 2016 565 $ 43.28 Exercised (144 ) 30.04 Forfeited/Expired (189 ) 73.88 Outstanding at December 31, 2017 232 26.36 Exercised (114 ) 26.40 Forfeited/Expired (4 ) 74.88 Outstanding at December 31, 2018 114 24.00 Exercised (42 ) 25.59 Forfeited/Expired (5 ) 25.32 Outstanding at December 31, 2019 67 $ 23.13 Options Exercisable at December 31, 2019 67 $ 23.13
Summary of restricted stock activity	The following table summarizes restricted stock activity for the years ended December 31, 2019 , 2018 , and 2017 (shares in thousands): Number of Shares Weighted-Average Grant Date Fair Value Non-vested restricted stock at December 31, 2016 117 $ 30.28 Granted 77 34.52 Vested (53 ) 30.00 Forfeited (2 ) 26.12 Non-vested restricted stock at December 31, 2017 139 31.72 Granted 78 34.04 Vested (64 ) 31.32 Forfeited (5 ) 32.88 Non-vested restricted stock at December 31, 2018 148 33.08 Granted 66 35.64 Vested (72 ) 34.09 Forfeited (1 ) 34.46 Non-vested restricted stock at December 31, 2019 141 $ 34.81
Summary of all performance-based RSU activity	The following table summarizes the performance-based RSU activity for the years ended December 31, 2019 , 2018 , and 2017 (in thousands): Outstanding at December 31, 2016 318 Granted 100 Vested (144 ) Forfeited (3 ) Outstanding at December 31, 2017 271 Granted 113 Vested (75 ) Forfeited (9 ) Outstanding at December 31, 2018 300 Granted 93 Vested (94 ) Forfeited (1 ) Outstanding at December 31, 2019 298

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
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): 2019 2018 2017 Amount Rate Amount Rate Amount Rate Federal income tax benefit (expense) $ (65 ) (21 )% $ 143 21 % $ 47 35 % State income tax benefit (expense), net of federal income tax effect (12 ) (4 )% 27 4 % 5 4 % Deferred tax adjustment 127 41 % Change in deferred tax assets as a result of change in tax law — — % — — % (340 ) (254 )% Valuation allowance (45 ) (15 )% (174 ) (26 )% 283 211 % Other (5 ) (1 )% 4 1 % 5 4 % 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, 2019 and 2018 are as follows (in thousands): 2019 2018 Income from unconsolidated joint ventures $ 27 $ 18 Federal and state tax carryforwards 702 763 Other 99 2 Total deferred tax assets 828 783 Valuation allowance (828 ) (783 ) Net deferred tax asset $ — $ —

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2019
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, 2019 , 2018 and 2017 (in thousands, except per share amounts): Year Ended December 31 2019 2018 2017 Earnings per common share - basic: Numerator: Net income $ 152,683 $ 80,765 $ 219,959 Net income attributable to noncontrolling interests in CPLP (1,952 ) (1,345 ) (3,681 ) Net income attributable to other noncontrolling interests (313 ) (256 ) (3 ) Net income available for common stockholders $ 150,418 $ 79,164 $ 216,275 Denominator: Weighted average common shares - basic 128,060 105,076 103,902 Net income per common share - basic $ 1.17 $ 0.75 $ 2.08 Earnings per common share - diluted: Numerator: Net income $ 152,683 $ 80,765 $ 219,959 Net income attributable to other noncontrolling interests (313 ) (256 ) (3 ) Net income available for common stockholders before net income attributable to noncontrolling interests in CPLP $ 152,370 $ 80,509 $ 219,956 Denominator: Weighted average common shares - basic 128,060 105,076 103,902 Add: Potential dilutive common shares - stock options 27 48 78 Weighted average units of CPLP convertible into common shares 1,744 1,744 1,844 Weighted average common shares - diluted 129,831 106,868 105,824 Net income per common share - diluted $ 1.17 $ 0.75 $ 2.08

Consolidated Statements of Ca_3

Consolidated Statements of Cash Flows - Supplemental Information (Tables)	12 Months Ended
	Dec. 31, 2019
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, 2019 , 2018 , and 2017 is as follows (in thousands): 2019 2018 2017 Interest paid, net of amounts capitalized $ 38,062 $ 43,166 $ 30,572 Income taxes paid — — — Non-Cash Transactions: Non-cash assets and liabilities assumed in TIER transaction 1,512,373 — — Transfer from operating properties and related liabilities to assets and liabilities of real estate assets held for sale 318,516 — — Ground lease right-of-use assets and associated liabilities 56,294 — — Transfer from investment in unconsolidated joint venture to operating properties 50,781 — 68,498 Common stock dividends declared and accrued 42,559 27,326 25,202 Change in accrued property acquisition, development, and tenant asset expenditures 4,891 (18,104 ) 5,965 Non-cash consideration for property acquisition 10,071 — — Transfer from projects under development to operating properties — 325,490 58,928 Cumulative effect of change in accounting principle — 22,329 — Transfer from investment in unconsolidated joint ventures to projects under development — 7,025 —
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, 2019 2018 2017 Cash and cash equivalents $ 15,603 $ 2,547 $ 148,929 Restricted cash 2,005 148 56,816 Total cash, cash equivalents, and restricted cash $ 17,608 $ 2,695 $ 205,745
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, 2019 2018 2017 Cash and cash equivalents $ 15,603 $ 2,547 $ 148,929 Restricted cash 2,005 148 56,816 Total cash, cash equivalents, and restricted cash $ 17,608 $ 2,695 $ 205,745

Reportable Segments (Tables)

Reportable Segments (Tables)	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Reconciliation of NOI to net income available to common stockholders	Information on the Company's segments along with a reconciliation of net income available to common stockholders to NOI is as follows (in thousands): Year Ended December 31, 2019 Office Mixed-Use Total Net Operating Income: Atlanta $ 158,093 $ (48 ) $ 158,045 Austin 93,311 — 93,311 Charlotte 77,082 — 77,082 Phoenix 37,247 — 37,247 Tampa 33,586 — 33,586 Dallas 7,473 — 7,473 Other 21,939 3,107 25,046 Total Net Operating Income $ 428,731 $ 3,059 $ 431,790 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 The following reconciles Net Income to Net Operating Income for each of the periods presented (in thousands): Year Ended December 31, 2019 2018 2017 Net income $ 152,683 $ 80,765 $ 219,959 Net operating income from unconsolidated joint ventures 32,413 28,888 31,053 Fee income (28,518 ) (10,089 ) (8,632 ) Termination fee income (7,228 ) (1,548 ) (9,270 ) Other income (246 ) (1,722 ) (2,248 ) Reimbursed expenses 4,004 3,782 3,527 General and administrative expenses 37,007 22,040 27,523 Interest expense 53,963 39,430 33,524 Depreciation and amortization 257,149 181,382 196,745 Acquisition and transaction costs 52,881 248 1,661 Other expenses 1,109 556 1,796 Gain on extinguishment of debt — (8 ) (2,258 ) Income from unconsolidated joint ventures (12,666 ) (12,224 ) (47,115 ) Gain on sale of investment properties (110,761 ) (5,437 ) (133,059 ) Net Operating Income $ 431,790 $ 326,063 $ 313,206
Reconciliation of revenue from segments to consolidated	Revenues by reportable segment, including a reconciliation to total rental property revenues on the consolidated statements of operations for years ended December 31, 2019 , 2018 , and 2017 are as follows (in thousands): Year Ended December 31, 2019 Office Mixed-Use Total Revenues: Atlanta $ 242,209 $ 8 $ 242,217 Austin 160,196 — 160,196 Charlotte 120,214 — 120,214 Tampa 54,216 — 54,216 Phoenix 51,586 — 51,586 Dallas 9,421 — 9,421 Other 38,732 4,630 43,362 Total segment revenues 676,574 4,638 681,212 Less: Company's share of rental property revenues from unconsolidated joint ventures (47,823 ) (4,638 ) (52,461 ) Total rental property revenues $ 628,751 $ — $ 628,751 Year Ended December 31, 2018 Office Mixed-Use Total Revenues: Atlanta $ 206,692 $ — $ 206,692 Austin 104,817 — 104,817 Charlotte 92,398 — 92,398 Phoenix 51,238 — 51,238 Tampa 49,822 — 49,822 Other 2,207 3,724 5,931 Total segment revenues 507,174 3,724 510,898 Less: Company's share of rental property revenues from unconsolidated joint ventures (43,773 ) (3,724 ) (47,497 ) Total rental property revenues $ 463,401 $ — $ 463,401 Year Ended December 31, 2017 Office Mixed-Use Total Revenues: Atlanta $ 180,497 $ 5,237 $ 185,734 Austin 101,222 — 101,222 Charlotte 92,242 — 92,242 Phoenix 51,209 — 51,209 Tampa 47,402 — 47,402 Orlando 24,973 — 24,973 Other 3,053 999 4,052 Total segment revenues 500,598 6,236 506,834 Less: Company's share of rental property revenues from unconsolidated joint ventures (45,293 ) (6,236 ) (51,529 ) Total rental property revenues $ 455,305 $ — $ 455,305

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, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Percentage of partnership units owned by the Company	99.00%
Distribution of taxable income to qualify as REIT, percentage		100.00%
Company's portfolio of real estate assets - Office space (square feet)		21,500
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 (Basis of Presentation) (Details)	Jun. 14, 2019shares	Dec. 31, 2019shares	Jun. 15, 2019shares	Dec. 31, 2018shares
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reverse stock split ratio	0.25
Common stock, shares authorized	175,000,000	300,000,000	300,000,000	175,000,000

Description of Business and B_4

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, 2019	Jan. 01, 2019	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Capitalized indirect leasing costs	$ 3,800	$ 3,000
Weighted average discount rate			4.50%	4.49%
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				$ 56,300
Lease liability				$ 56,300
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

Significant Accounting Polici_3

Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
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	$ 657,515	$ 475,212	$ 466,185
Deferred income	$ 52,269	41,266
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
Tenant Funded Improvements
Revenue from External Customer [Line Items]
Deferred income	$ 17,800	16,200
Tenants Expenses
Revenue from External Customer [Line Items]
Revenues	$ 122,400	$ 79,800	$ 67,200

Transactions With Tier Reit, _3

Transactions With Tier Reit, Inc. (Additional Information) (Details) $ in Thousands, shares in Millions	Jun. 14, 2019USD ($)shares	Dec. 31, 2019USD ($)
Business Acquisition [Line Items]
Reverse stock split ratio	0.25
TIER
Business Acquisition [Line Items]
Stock conversation ratio	2.98
Fair value of assets acquired and liabilities assumed	$ 1,600,000
Acquisition expenses		$ 52,900
TIER | Rental property revenues
Business Acquisition [Line Items]
Amount reported in consolidated revenue		113,100
Amount reported in consolidated net income		$ 291
TIER REIT, Inc.
Business Acquisition [Line Items]
Number of shares issued | shares	166

Transactions With Tier Reit, _4

Transactions With Tier Reit, Inc. (Purchase Price Allocation) (Details) - TIER $ in Thousands	Mar. 25, 2019USD ($)
Business Acquisition [Line Items]
Real estate assets	$ 2,202,073
Real estate assets held for sale	20,835
Cash	84,042
Restricted cash	1,947
Notes and other receivables	8,278
Investment in unconsolidated joint ventures	331
Intangible assets	141,184
Other assets	10,040
Total assets acquired	2,468,730
Notes payable	747,549
Accounts payable and accrued expenses	53,321
Deferred income	8,388
Intangible liabilities	47,988
Other liabilities	7,793
Nonredeemable noncontrolling interests (excluding CPLP)	5,329
Total liabilities acquired	870,368
Total purchase price	$ 1,598,362

Transactions With Tier Reit, _5

Transactions With Tier Reit, Inc. (Pro Forma Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Business Combinations [Abstract]
Revenues	$ 750,080	$ 702,463
Net income	232,136	28,064
Net income available to common stockholders	$ 229,503	$ 27,742

Transactions with Norfolk Sou_2

Transactions with Norfolk Southern Railway Company (Additional Information) (Details) - USD ($)	Mar. 01, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of property		$ 62,667,000	$ 372,000	$ 370,944,000
Assets		7,151,447,000	4,146,296,000
Contract price that is expected to be recognized as revenue	$ 52,300,000
Deferred income		52,269,000	41,266,000
1200 Peachtree
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets	92,300,000
Land
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property purchased		6,500,000	$ 37,000,000
Site Preparation Work
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property purchased	4,000,000
NS
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue recognized		21,400,000
Deferred income		$ 11,300,000
NS | 1200 Peachtree
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase of a building	$ 82,000,000
Lease term	3 years
Discount on service contract price	$ 10,300,000
Gain or loss on derecognition of non financial asset fair value	0
Consideration for the various services component	52,300,000
NS | Fees for development services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contract fees	5,000,000
NS | Fees for consulting services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contract fees	32,000,000
NS | Development agreement | 1200 Peachtree
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration for various services contract	5,000,000
NS | Consulting agreement | 1200 Peachtree
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration for various services contract	32,000,000
NS | Land
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of property	52,500,000
Gain on sale of property	5,000,000
NS | Land | 1200 Peachtree
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration for various services contract	$ 5,000,000

Real Estate Transactions (Dispo

Real Estate Transactions (Dispositions) (Details) ft² in Thousands, $ in Thousands	1 Months Ended	12 Months Ended
	Feb. 28, 2019USD ($)a	Dec. 31, 2017USD ($)ft²
Atlanta, GA | American Cancer Society Center
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²		996
Sales Price		$ 166,000
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 | ft²		1,038
Sales Price		$ 208,100
Downtown Atlanta
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | a	8
Sales Price	$ 13,250
Gain on sale of property	$ 13,100

Real Estate Transactions (Asset

Real Estate Transactions (Assets and Liabilities Held-for-sale) (Details) - Held-for-sale - Woodcrest and Hearst Tower $ in Thousands	Dec. 31, 2019USD ($)
Real estate assets and other assets held for sale
Operating properties, net of accumulated depreciation of $44,478	$ 340,171
Notes and accounts receivable	5,520
Deferred rents receivable	5,745
Intangible assets, net of accumulated amortization of $16,615	8,657
Other assets	489
Total assets of discontinued operation	360,582
Liabilities of real estate assets held for sale
Accounts payable and accrued expenses	12,497
Deferred income	2,638
Intangible liabilities, net of accumulated amortization of $7,771	5,471
Other liabilities	625
Total liabilities of discontinued operation	21,231
Operating properties, net of accumulated depreciation	44,478
Intangible assets, net of accumulated amortization	16,615
Intangible liabilities, net of accumulated amortization	$ 7,771

Real Estate Transactions (Acqui

Real Estate Transactions (Acquisitions) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
1200 Peachtree
Tangible assets:
Building and improvements	$ 62,836
Land and improvements	19,495
Tangible assets	82,331
Intangible assets:
Total intangible assets	9,969
Intangible liabilities:
Total intangible liabilities	0
Total net assets acquired	92,300
1200 Peachtree | In-place leases
Intangible assets:
Total intangible assets	9,969
1200 Peachtree | Above market leases
Intangible assets:
Total intangible assets	0
Terminus
Tangible assets:
Building and improvements	410,826
Land and improvements	49,345
Tangible assets	460,171
Intangible assets:
Total intangible assets	31,867
Intangible liabilities:
Total intangible liabilities	4,745
Total net assets acquired	487,293
Terminus | In-place leases
Intangible assets:
Total intangible assets	24,674
Terminus | Above market leases
Intangible assets:
Total intangible assets	$ 7,193

Leases (Additional Information)

Leases (Additional Information) (Details)	12 Months Ended
	Dec. 31, 2019USD ($)property	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Jan. 01, 2019
Leases [Abstract]
Number of properties subject to operating lease | property	5
Operating lease, weighted average remaining term	72 years
Number of properties subject to finance lease | property	2
Finance lease, weighted average remaining term	4 years
Operating ground leases, right-of-use asset	$ 57,300,000
Finance ground leases, right-of-use asset	11,900,000
Operating ground leases, liability	59,379,000
Finance ground leases, liability	$ 9,730,000
Weighted average discount rate	4.50%			4.49%
Operating lease expense	$ 3,900,000
Operating lease expense		$ 3,500,000	$ 3,200,000
Variable lease expense	0
Interest expense related to finance lease	462,000
Operating lease payments	2,600,000
Finance lease payments	$ 462,000

Leases (Future Minimum Payments

Leases (Future Minimum Payments) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Operating Ground Leases
2020	$ 3,175
2021	2,959
2022	2,672
2023	2,614
2024	2,497
Thereafter	200,107
Total minimum payments	214,024
Discount	(154,645)
Lease liability	59,379
2019		$ 2,441
2020		2,460
2021		2,497
2022		2,497
2023		2,497
Thereafter		202,603
Total minimum payments		214,995
Finance Ground Leases
2020	462
2021	6,562
2022	162
2023	162
2024	162
Thereafter	3,676
Total minimum payments	11,186
Discount	(1,456)
Lease liability	$ 9,730
2019		462
2020		462
2021		6,562
2022		162
2023		162
Thereafter		3,838
Total minimum payments		$ 11,648

Notes and Accounts Receivable_2

Notes and Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Receivables [Abstract]
Notes receivable	$ 356	$ 453
Tenant and other receivables	23,324	13,368
Total notes and accounts receivable	$ 23,680	$ 13,821

Investment in Unconsolidated _3

Investment in Unconsolidated Joint Ventures (Summary of Financial Position) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
SUMMARY OF FINANCIAL POSITION
Total Assets	$ 658,303	$ 779,204
Total Debt	165,039	342,892
Total Equity (Deficit)	354,404	338,427
Company's Investment	114,158	140,376
DC Charlotte Plaza LLLP
SUMMARY OF FINANCIAL POSITION
Total Assets	179,694	155,530
Total Debt	0	0
Total Equity (Deficit)	90,373	88,922
Company's Investment	48,058	46,554
Austin 300 Colorado Project, LP
SUMMARY OF FINANCIAL POSITION
Total Assets	112,630	51,180
Total Debt	21,430	0
Total Equity (Deficit)	68,101	41,298
Company's Investment	36,846	22,335
Carolina Square Holdings LP
SUMMARY OF FINANCIAL POSITION
Total Assets	114,483	106,187
Total Debt	75,662	74,638
Total Equity (Deficit)	25,184	28,844
Company's Investment	14,414	16,840
AMCO 120 WT Holdings, LLC
SUMMARY OF FINANCIAL POSITION
Total Assets	77,377	36,680
Total Debt	0	0
Total Equity (Deficit)	70,696	31,372
Company's Investment	13,362	5,538
HICO Victory Center LP
SUMMARY OF FINANCIAL POSITION
Total Assets	16,045	15,069
Total Debt	0	0
Total Equity (Deficit)	15,353	14,801
Company's Investment	10,373	10,003
Charlotte Gateway Village, LLC
SUMMARY OF FINANCIAL POSITION
Total Assets	109,675	112,553
Total Debt	0	0
Total Equity (Deficit)	106,651	109,666
Company's Investment	6,718	8,225
Terminus Office Holdings LLC
SUMMARY OF FINANCIAL POSITION
Total Assets	0	258,060
Total Debt	0	198,732
Total Equity (Deficit)	0	50,539
Company's Investment	0	48,571
Wildwood Associates
SUMMARY OF FINANCIAL POSITION
Total Assets	11,061	11,157
Total Debt	0	0
Total Equity (Deficit)	10,978	11,108
Company's Investment	(521)	(460)
Crawford Long - CPI, LLC
SUMMARY OF FINANCIAL POSITION
Total Assets	28,459	26,429
Total Debt	67,947	69,522
Total Equity (Deficit)	(40,250)	(44,146)
Company's Investment	(19,205)	(21,071)
Other
SUMMARY OF FINANCIAL POSITION
Total Assets	8,879	6,359
Total Debt	0	0
Total Equity (Deficit)	7,318	6,023
Company's Investment	$ 4,113	$ 3,841

Investment in Unconsolidated _4

Investment in Unconsolidated Joint Ventures (Summary of Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SUMMARY OF OPERATIONS
Total Revenues	$ 104,471	$ 95,515	$ 110,664
Net Income (Loss)	25,685	15,352	77,944
Company's Share of Net Income (Loss)	12,666	12,224	47,115
Charlotte Gateway Village, LLC
SUMMARY OF OPERATIONS
Total Revenues	27,708	26,932	26,465
Net Income (Loss)	10,285	10,285	9,528
Company's Share of Net Income (Loss)	5,143	5,143	4,764
DC Charlotte Plaza LLLP
SUMMARY OF OPERATIONS
Total Revenues	15,636	0	2
Net Income (Loss)	5,894	0	2
Company's Share of Net Income (Loss)	2,947	(1)	1
Terminus Office Holdings LLC
SUMMARY OF OPERATIONS
Total Revenues	34,964	44,429	43,959
Net Income (Loss)	4,962	5,506	6,307
Company's Share of Net Income (Loss)	2,381	2,755	3,153
Crawford Long - CPI, LLC
SUMMARY OF OPERATIONS
Total Revenues	12,664	12,383	12,079
Net Income (Loss)	3,897	3,446	3,171
Company's Share of Net Income (Loss)	1,866	1,641	1,572
HICO Victory Center LP
SUMMARY OF OPERATIONS
Total Revenues	513	400	429
Net Income (Loss)	513	400	431
Company's Share of Net Income (Loss)	276	219	225
Carolina Square Holdings LP
SUMMARY OF OPERATIONS
Total Revenues	12,344	10,686	2,701
Net Income (Loss)	470	(169)	(532)
Company's Share of Net Income (Loss)	133	(275)	522
Austin 300 Colorado Project, LP
SUMMARY OF OPERATIONS
Total Revenues	422	487	0
Net Income (Loss)	199	220	0
Company's Share of Net Income (Loss)	100	110	0
Wildwood Associates
SUMMARY OF OPERATIONS
Total Revenues	0	0	0
Net Income (Loss)	(100)	(1,140)	(116)
Company's Share of Net Income (Loss)	(50)	2,723	(58)
AMCO 120 WT Holdings, LLC
SUMMARY OF OPERATIONS
Total Revenues	40	0	0
Net Income (Loss)	(341)	38	58
Company's Share of Net Income (Loss)	(68)	0	0
Other
SUMMARY OF OPERATIONS
Total Revenues	180	198	25,029
Net Income (Loss)	(94)	(3,234)	59,095
Company's Share of Net Income (Loss)	$ (62)	$ (91)	$ 36,936

Investment in Unconsolidated _5

Investment in Unconsolidated Joint Ventures (DC Charlotte Plaza LLLP) (Details) - DC Charlotte Plaza LLLP ft² in Thousands, $ in Millions	Dec. 31, 2019USD ($)ft²
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	5000.00%
Square footage of real estate property (square feet) | ft²	281
Maximum required capital contribution	$ 46
Cash balance of joint venture	$ 1.7
DFA
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	5000.00%

Investment in Unconsolidated _6

Investment in Unconsolidated Joint Ventures (Austin 300 Colorado Project, LP) (Details) ft² in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)ft²	Dec. 31, 2018USD ($)
Schedule of Equity Method Investments [Line Items]
Aggregate outstanding indebtedness to third parties	$ 165,039	$ 342,892
Austin 300 Colorado Project, LP
Schedule of Equity Method Investments [Line Items]
Square footage of real estate property (square feet) | ft²	358
Ownership interest percentage	50.00%
Aggregate outstanding indebtedness to third parties	$ 21,430	$ 0
Cash balance of joint venture	$ 593
Austin 300 Colorado Project, LP | LIBOR
Schedule of Equity Method Investments [Line Items]
Basis spread on variable rate (percent)	2.25%
Austin 300 Colorado Project, LP | 3CB
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	34.50%
Austin 300 Colorado Project, LP | 3CRR
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	15.50%
Construction Loans | Austin 300 Colorado Project, LP
Schedule of Equity Method Investments [Line Items]
Maximum borrowing capacity	$ 126,000

Investment in Unconsolidated _7

Investment in Unconsolidated Joint Ventures (Carolina Square Holdings LP) (Details) ft² in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)ft²apartment_unit	Dec. 31, 2018USD ($)
Schedule of Equity Method Investments [Line Items]
Aggregate outstanding indebtedness	$ 165,039	$ 342,892
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	$ 75,662	$ 74,638
Maximum percentage guaranteed under construction loan	12.50%
Cash balance of joint venture	$ 4,700
Carolina Square Holdings LP | LIBOR
Schedule of Equity Method Investments [Line Items]
Basis spread on variable rate (percent)	1.90%
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 _8

Investment in Unconsolidated Joint Ventures (AMCO 120 WT Holdings, LLC) (Details) - AMCO 120 WT Holdings, LLC ft² in Thousands, $ in Thousands	Dec. 31, 2019USD ($)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 | $	$ 49
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 _9

Investment in Unconsolidated Joint Ventures (HICO Victory Center LP) (Details) - HICO Victory Center LP $ in Thousands	Dec. 31, 2019USD ($)
Schedule of Equity Method Investments [Line Items]
Land funding requirement (percent)	75.00%
Cash balance of joint venture	$ 775
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) $ in Thousands, ft² in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)ft²	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Schedule of Equity Method Investments [Line Items]
Proceeds from investment property sales		$ 62,667	$ 372	$ 370,944
Charlotte Gateway Village, 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		1.1
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		$ 3,800
Charlotte Gateway Village, LLC | BOA
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture		50.00%
Allocation of net income and cash flows, percentage		50.00%
Allocation of proceeds from capital transactions, percentage, third priority		80.00%
Scenario Forecast | Charlotte Gateway Village, LLC | BOA
Schedule of Equity Method Investments [Line Items]
Proceeds from investment property sales	$ 52,200

Investment in Unconsolidated_11

Investment in Unconsolidated Joint Ventures (Terminus Office Holdings LLC) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)Property	Dec. 31, 2018USD ($)
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated joint ventures	$ 133,884	$ 161,907
Terminus Office Holdings LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	5000.00%
Value of interest in the property	$ 148,000
Investment in unconsolidated joint ventures	503,000
Gain recorded in income from unconsolidated joint ventures	$ 92,800
Terminus Office Holdings LLC | Secured Mortgage Note Payable
Schedule of Equity Method Investments [Line Items]
Weighted average interest rate	50.00%
Terminus Office Holdings LLC | Office Buildings
Schedule of Equity Method Investments [Line Items]
Number of properties owned | Property	2
Terminus Office Holdings LLC | JPM
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	5000.00%

Investment in Unconsolidated_12

Investment in Unconsolidated Joint Ventures (Wildwood Associates) (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Company's investment balance		$ 114,158	$ 140,376
Proceeds from investment property sales		62,667	372	$ 370,944
Income from unconsolidated joint ventures		$ 12,666	12,224	$ 47,115
Wildwood Associates
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture		50.00%
Company's investment balance		$ (521)	$ (460)
Cash balance of joint venture		$ 38
Wildwood Associates | Subsequent Event
Schedule of Equity Method Investments [Line Items]
Proceeds from investment property sales	$ 900
Income from unconsolidated joint ventures	$ 1,400
Wildwood Associates | IBM
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture		50.00%

Investment in Unconsolidated_13

Investment in Unconsolidated Joint Ventures (Crawford Long—CPI, LLC) (Details) ft² in Thousands, $ in Thousands	Dec. 31, 2019USD ($)ft²	Dec. 31, 2018USD ($)
Schedule of Equity Method Investments [Line Items]
Aggregate outstanding indebtedness	$ 165,039	$ 342,892
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	$ 67,947	$ 69,522
Cash balance of joint venture	$ 4,500
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_14

Investment in Unconsolidated Joint Ventures (Other Data) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity Method Investments and Joint Ventures [Abstract]
Aggregate outstanding indebtedness to third parties	$ 165,039	$ 342,892
Fees earned from unconsolidated joint ventures	$ 7,100	$ 9,300	$ 7,200

Intangible Assets (Intangible A

Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 1,674	$ 1,674
Total intangible assets	257,649	145,883
In-place leases
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	202,760	105,964
Accumulated amortization	163,867	125,130
Above market leases
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	35,699	20,453
Accumulated amortization	26,487	19,502
Below-market ground leases
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	17,516	17,792
Accumulated amortization	$ 897	$ 621

Intangible Assets (Additional I

Intangible Assets (Additional Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Net amortization expense of intangible assets and liabilities	$ 45.6	$ 27	$ 42.4

Intangible Assets (Intangibles

Intangible Assets (Intangibles - Future Amortization) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Future Amortization of Intangible Assets:
Weighted average remaining lease term	10 years
2020	$ 43,013
2021	32,823
2022	22,376
2023	17,811
2024	13,316
Thereafter	43,531
Finite-lived intangibles, net	172,870
Below Market Rents
Future Amortization of Intangible Liabilities:
2020	(19,379)
2021	(14,201)
2022	(11,065)
2023	(9,365)
2024	(8,080)
Thereafter	(19,342)
Finite-lived intangible liabilities, net	$ (81,432)
Weighted average remaining lease term	7 years
Above Market Ground Lease
Future Amortization of Intangible Liabilities:
2020	$ (46)
2021	(46)
2022	(46)
2023	(46)
2024	(46)
Thereafter	(1,443)
Finite-lived intangible liabilities, net	$ (1,673)
Weighted average remaining lease term	36 years
Below Market Ground Lease
Future Amortization of Intangible Assets:
2020	$ 276
2021	276
2022	276
2023	276
2024	276
Thereafter	16,136
Finite-lived intangible assets, net	$ 17,516	$ 17,792
Weighted average remaining lease term	65 years
Above Market Rents
Future Amortization of Intangible Assets:
2020	$ 8,036
2021	6,660
2022	5,267
2023	4,222
2024	3,339
Thereafter	8,175
Finite-lived intangible assets, net	$ 35,699	20,453
Weighted average remaining lease term	7 years
In Place Leases
Future Amortization of Intangible Assets:
2020	$ 54,126
2021	40,134
2022	27,944
2023	22,724
2024	17,827
Thereafter	40,005
Finite-lived intangible assets, net	$ 202,760	$ 105,964
Weighted average remaining lease term	7 years

Other Assets (Details)

Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Predevelopment costs and earnest money	$ 25,586	$ 8,249
Furniture, fixtures and equipment, leasehold improvements, and other deferred costs, net of accumulated depreciation of $29,131 and $25,193 in 2019 and 2018, respectively	17,791	14,942
Prepaid expenses and other assets	5,924	5,087
Lease inducements, net of accumulated amortization of $2,333 and $1,545 in 2019 and 2018, respectively	5,632	4,961
Line of credit deferred financing costs, net of accumulated amortization of $2,952 and $1,451 in 2019 and 2018, respectively	4,516	5,844
Total other assets	59,449	39,083
Furniture, fixtures and equipment, leasehold improvements, and other deferred costs, accumulated depreciation	29,131	25,193
Lease inducements, accumulated amortization	2,333	1,545
Line of credit deferred financing costs, accumulated amortization	$ 2,952	$ 1,451

Notes Payable (Terms of Notes P

Notes Payable (Terms of Notes Payable) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Jun. 30, 2019	Mar. 25, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term debt	$ 2,218,093			$ 1,067,362
Unamortized premium	11,239			0
Unamortized loan costs	(6,357)			(4,792)
Total Notes Payable	$ 2,222,975			1,062,570
Weighted average maturity period of notes payable outstanding	5 years 6 months
Senior Notes, Unsecured | 3.95% Senior Notes, Unsecured
Debt Instrument [Line Items]
Interest Rate	3.95%
Long-term debt	$ 275,000			0
Senior Notes, Unsecured | 3.91% Senior Notes, Unsecured
Debt Instrument [Line Items]
Interest Rate	3.91%	3.91%
Long-term debt	$ 250,000			250,000
Senior Notes, Unsecured | 3.86% Senior Notes, Unsecured
Debt Instrument [Line Items]
Interest Rate	3.86%
Long-term debt	$ 250,000			0
Senior Notes, Unsecured | 3.78% Senior Notes, Unsecured
Debt Instrument [Line Items]
Interest Rate	3.78%
Long-term debt	$ 125,000			0
Senior Notes, Unsecured | 4.09% Senior Notes, Unsecured
Debt Instrument [Line Items]
Interest Rate	4.09%	4.09%
Long-term debt	$ 100,000			100,000
Credit Facility, Unsecured
Debt Instrument [Line Items]
Interest Rate	2.81%
Long-term debt	$ 251,500			0
Term Loan, unsecured
Debt Instrument [Line Items]
Interest Rate	2.96%
Long-term debt	$ 250,000			250,000
Mortgage Debt
Debt Instrument [Line Items]
Total Notes Payable	$ 716,600
Mortgage Debt | Fifth Third Center
Debt Instrument [Line Items]
Interest Rate	3.37%
Long-term debt	$ 140,332			143,497
Mortgage Debt | Terminus 100
Debt Instrument [Line Items]
Interest Rate	5.25%
Long-term debt	$ 118,146			0
Mortgage Debt | Colorado Tower
Debt Instrument [Line Items]
Interest Rate	3.45%
Long-term debt	$ 117,085			119,427
Mortgage Debt | Promenade
Debt Instrument [Line Items]
Interest Rate	4.27%
Long-term debt	$ 95,986			99,238
Mortgage Debt | 816 Congress
Debt Instrument [Line Items]
Interest Rate	3.75%
Long-term debt	$ 79,987			81,676
Mortgage Debt | Terminus 200
Debt Instrument [Line Items]
Interest Rate	3.79%
Long-term debt	$ 76,079			0
Mortgage Debt | Legacy Union One
Debt Instrument [Line Items]
Interest Rate			4.24%
Long-term debt			$ 66,000	0
Mortgage Debt | Meridian Mark Plaza
Debt Instrument [Line Items]
Interest Rate	6.00%
Long-term debt	$ 22,978			$ 23,524

Notes Payable (Credit Facility)

Notes Payable (Credit Facility) (Details) - Credit Facility	12 Months Ended
	Dec. 31, 2019USD ($)
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 1,000,000,000
Fixed charge coverage ratio	1.50
Remaining borrowing capacity	$ 748,500,000
Minimum
Line of Credit Facility [Line Items]
Unencumbered interest coverage ratio	1.75
Maximum
Line of Credit Facility [Line Items]
Secured leverage ratio (percent)	40.00%
Leverage ratio (percent)	60.00%
LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)	1.05%
LIBOR | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)	1.05%
LIBOR | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)	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%
Base Rate | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)	0.45%

Notes Payable (Term Loan) (Deta

Notes Payable (Term Loan) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Unsecured term loan	$ 2,218,093	$ 1,067,362
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	1 Months Ended	12 Months Ended
	Jun. 30, 2019USD ($)tranche	Dec. 31, 2019
Debt Instrument [Line Items]
Debt amount	$ 350,000,000
Number of tranches | tranche	2
Fixed charge coverage ratio		1.50
Minimum
Debt Instrument [Line Items]
Unencumbered interest coverage ratio		1.75
Maximum
Debt Instrument [Line Items]
Leverage ratio (percent)		60.00%
Secured leverage ratio (percent)		40.00%
3.78% Senior Notes, Unsecured
Debt Instrument [Line Items]
Interest rate		3.78%
3.86% Senior Notes, Unsecured
Debt Instrument [Line Items]
Interest rate		3.86%
3.95% Senior Notes, Unsecured
Debt Instrument [Line Items]
Interest rate		3.95%
4.09% Senior Notes, Unsecured
Debt Instrument [Line Items]
Debt amount	$ 100,000,000
Interest rate	4.09%	4.09%
3.91% Senior Notes, Unsecured
Debt Instrument [Line Items]
Debt amount	$ 250,000,000
Interest rate	3.91%	3.91%
Private Placement
Debt Instrument [Line Items]
Debt amount	$ 650,000,000
Number of tranches | tranche	3
Private Placement | 3.78% Senior Notes, Unsecured
Debt Instrument [Line Items]
Debt amount	$ 125,000,000
Interest rate	3.78%
Debt term	8 years
Private Placement | 3.86% Senior Notes, Unsecured
Debt Instrument [Line Items]
Debt amount	$ 250,000,000
Interest rate	3.86%
Debt term	9 years
Private Placement | 3.95% Senior Notes, Unsecured
Debt Instrument [Line Items]
Debt amount	$ 275,000,000
Interest rate	3.95%
Debt term	10 years

Notes Payable (Mortgage Loan In

Notes Payable (Mortgage Loan Information) (Details) $ in Thousands	Feb. 03, 2020USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2019USD ($)debt_instrument
Debt Instrument [Line Items]
Long-term debt		$ 1,067,362	$ 2,218,093
Outstanding amount		1,062,570	2,222,975
Term Loan
Debt Instrument [Line Items]
Long-term debt		250,000	$ 250,000
Interest rate			2.96%
Mortgage Debt
Debt Instrument [Line Items]
Outstanding amount			$ 716,600
Number of non-recourse mortgage loans | debt_instrument			8
Assets pledged as security			$ 1,100,000
Mortgage Debt | Terminus 100
Debt Instrument [Line Items]
Long-term debt		0	$ 118,146
Interest rate			5.25%
Mortgage Debt | Terminus 200
Debt Instrument [Line Items]
Long-term debt		0	$ 76,079
Interest rate			3.79%
Mortgage Debt | Meridian Mark Plaza
Debt Instrument [Line Items]
Long-term debt		23,524	$ 22,978
Interest rate			6.00%
Mortgage Debt | The Pointe
Debt Instrument [Line Items]
Amount of debt paid		$ 22,200
Subsequent Event | Mortgage Debt | Meridian Mark Plaza
Debt Instrument [Line Items]
Amount of debt paid	$ 23,000

Notes Payable (Debt Associated

Notes Payable (Debt Associated with the Merger) (Details) - USD ($)	Mar. 25, 2019	Dec. 31, 2019	Dec. 31, 2018
Line of Credit Facility [Line Items]
Long-term debt		$ 2,218,093,000	$ 1,067,362,000
Term Loan
Line of Credit Facility [Line Items]
Long-term debt		$ 250,000,000	$ 250,000,000
Interest rate		2.96%
Unsecured Variable Rate Debt of TIER | Term Loan | TIER
Line of Credit Facility [Line Items]
Repayment of debt	$ 679,000,000
Debt amount	$ 679,000,000

Notes Payable (Other Debt Infor

Notes Payable (Other Debt Information) (Details) - USD ($) $ in Billions	Dec. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Notes payable, fair value	$ 2.3	$ 1.1

Notes Payable (Interest Expense

Notes Payable (Interest Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Total interest incurred	$ 65,182	$ 44,332	$ 42,767
Interest capitalized	(11,219)	(4,902)	(9,243)
Total interest expense	$ 53,963	$ 39,430	$ 33,524

Notes Payable (Debt Maturities)

Notes Payable (Debt Maturities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
2020	$ 38,699
2021	266,369
2022	102,401
2023	504,655
2024	79,087
Thereafter	1,226,882
Total Notes Payable	$ 2,218,093	$ 1,067,362

Commitments and Contingencies (

Commitments and Contingencies (Details)	Dec. 31, 2019USD ($)
Commitments and Contingencies Disclosure [Abstract]
Outstanding letters of credit and performance bonds	$ 1,100,000
Future obligations under leases	205,400,000
Lessee, Lease, Description [Line Items]
Letters of credit outstanding	0
Operating leases	214,024,000
Operating leases other than ground leases
Lessee, Lease, Description [Line Items]
Operating leases	$ 404,000

Stockholders' Equity (Additiona

Stockholders' Equity (Additional Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2017	Dec. 31, 2018
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
Preferred stock, shares outstanding	1,716,837		1,716,837
Preferred stock, par value (in usd per share)	$ 1		$ 1
Percentage of restriction on ownership (more than)	3.90%
Common Stock
Class of Stock [Line Items]
Number of shares issued during period		6,300,000
Stock issuance costs		$ 1,100
Net proceeds from issuance of stock		$ 211,800
Number of units redeemed in exchange for common stock (in shares)		300,821
Aggregate value of units redeemed		$ 10,100
TIER | Common Stock
Class of Stock [Line Items]
Number of shares issued in merger	41,600,000

Stockholders' Equity (Distribut

Stockholders' Equity (Distribution of REIT Taxable Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Common and preferred dividends	$ 142,940	$ 107,167	$ 99,138
Dividends treated as taxable compensation	(161)	(150)	(129)
Dividends applied to meet current year REIT distribution requirements	$ 142,779	$ 107,017	$ 99,009

Stockholders' Equity (Tax Statu

Stockholders' Equity (Tax Status of Distributions) (Details) - Common Stock - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Total Distributions Per Share (in usd per share)	$ 1.130000	$ 1.020000	$ 0.960000
Unrecaptured Section 1250 Gain (in usd per share)	0	0	0.282088
Nondividend Distributions (in usd per share)	0	0	0
AMT Adjustment (in usd per share)	0	0	0.071024
Ordinary Dividends
Class of Stock [Line Items]
Total Distributions Per Share (in usd per share)	0.983133	1.005584	0.373248
Long-Term Capital Gain
Class of Stock [Line Items]
Total Distributions Per Share (in usd per share)	$ 0.146867	$ 0.014416	$ 0.586752

Revenue Recognition (Additional

Revenue Recognition (Additional Information) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Total rental property revenues		$ 657,515	$ 475,212	$ 466,185
Rental property revenues
Disaggregation of Revenue [Line Items]
Total rental property revenues	$ 628,800	628,751	463,401	455,305
Variable rental revenue	$ 176,600
Variable rental revenue
Disaggregation of Revenue [Line Items]
Total rental property revenues			119,300	115,900
Fees and other
Disaggregation of Revenue [Line Items]
Total rental property revenues		$ 28,800	$ 11,800	$ 10,900

Revenue Recognition (Future Min

Revenue Recognition (Future Minimum Payments to be Received) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Future minimum rents to be received, after adoption
2020	$ 502,147
2021	487,815
2022	438,624
2023	401,363
2024	365,024
Thereafter	1,358,674
Future minimum rents to be received	$ 3,553,647
Future minimum rents to be received, after adoption
2020		$ 328,607
2021		330,477
2022		314,410
2023		280,959
2024		256,233
Thereafter		1,115,490
Future minimum rents to be received		$ 2,626,176

Stock-Based Compensation (Addit

Stock-Based Compensation (Additional Information) (Details)	Dec. 31, 2019shares
Share-based Payment Arrangement [Abstract]
Shares authorized under stock option plan (in shares)	3,714,993

Stock-Based Compensation (Stock

Stock-Based Compensation (Stock Options Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding (in shares)	67,000	114,000	232,000	565,000
Fair value of options exercisable	$ 1,200
Weighted average contractual life of outstanding options (in years)	7 months 6 days
Weighted average contractual life of exercisable options (in years)		1 year 1 month 6 days
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding (in shares)	66,999
Number of stock issued during period (in shares)	10,451	11,827
Value of stock issued during period resulting from exercise of stock options		$ 945

Stock-Based Compensation (Sto_2

Stock-Based Compensation (Stock Option Activity) (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Number of Options
Outstanding at beginning of period (in shares)	114	232	565
Exercised (in shares)	(42)	(114)	(144)
Forfeited/Expired (in shares)	(5)	(4)	(189)
Outstanding at end of period (in shares)	67	114	232
Options Exercisable at end of period (in shares)	67
Weighted Average Exercise Price Per Option
Outstanding at beginning of period (in usd per share)	$ 24	$ 26.36	$ 43.28
Exercised (in usd per share)	25.59	26.40	30.04
Forfeited/Expired (in usd per share)	25.32	74.88	73.88
Outstanding at end of period (in usd per share)	23.13	$ 24	$ 26.36
Options Exercisable at end of period (in usd per share)	$ 23.13

Stock-Based Compensation (Restr

Stock-Based Compensation (Restricted Stock Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)awardshares	Dec. 31, 2018USD ($)awardshares	Dec. 31, 2017USD ($)awardshares
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (in shares) | shares	66,000	78,000	77,000
Compensation expense, restricted stock | $	$ 2.5	$ 2.3	$ 2
Unrecognized compensation cost | $	$ 2.7
Unrecognized compensation cost, period for recognition (in years)	1 year 8 months 12 days
Fair value of restricted stock that vested | $	$ 2.6	$ 2.3	$ 2
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	37,166	29,638	30,219
Restricted Stock | Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (in shares) | shares	65,824	78,799	77,072
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	93,000	113,000	100,000
Types of performance-based RSUs | award		2,000	2,000
Targeted number of units outstanding (in shares) | shares	92,649	110,488	94,845
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	42,809	4,459	66,181
Vesting period	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 6 days
Estimate of future expense for all types of RSUs outstanding | $	$ 6.5
Total cash paid for vesting and dividend payments | $	6.1
Recognized compensation expense related to RSUs for employees and directors, before capitalization or income tax benefit, if any | $	$ 9.9	$ 4.6	$ 7

Stock-Based Compensation (Res_2

Stock-Based Compensation (Restricted Stock Activity) (Details) - Restricted Stock - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Number of Shares
Outstanding at beginning of period (in shares)	148	139	117
Granted (in shares)	66	78	77
Vested (in shares)	(72)	(64)	(53)
Forfeited (in shares)	(1)	(5)	(2)
Outstanding at end of period (in shares)	141	148	139
Weighted-Average Grant Date Fair Value
Outstanding at beginning of period (in usd per share)	$ 33.08	$ 31.72	$ 30.28
Granted (in usd per share)	35.64	34.04	34.52
Vested (in usd per share)	34.09	31.32	30
Forfeited (in usd per share)	34.46	32.88	26.12
Outstanding at end of period (in usd per share)	$ 34.81	$ 33.08	$ 31.72

Stock-Based Compensation (Perfo

Stock-Based Compensation (Performance-Based RSU Activity) (Details) - Performance-based RSUs - shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Summary of all performance-based RSU activity
Outstanding at beginning of period (in shares)	300	271	318
Granted (in shares)	93	113	100
Vested (in shares)	(94)	(75)	(144)
Forfeited (in shares)	(1)	(9)	(3)
Outstanding at end of period (in shares)	298	300	271

Retirement Savings Plan (Detail

Retirement Savings Plan (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits [Abstract]
Employer contribution matching percentage	3.00%		3.00%
Employee vesting period in the retirement saving plan	2 years		3 years
Company defined contribution plan		$ 913	$ 647	$ 764

Income Taxes (Statutory Federal

Income Taxes (Statutory Federal Income Tax Rate) (Details) - CTRS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Amount
Federal income tax benefit (expense)	$ (65)	$ 143	$ 47
State income tax benefit (expense), net of federal income tax effect	(12)	27	5
Deferred tax adjustment	(127)
Change in deferred tax assets as a result of change in tax law	0	0	(340)
Valuation allowance	(45)	(174)	283
Other	(5)	4	5
Benefit applicable to income (loss) from continuing operations	$ 0	$ 0	$ 0
Rate
Federal income tax benefit (expense) (percent)	21.00%	21.00%	35.00%
State income tax benefit (expense), net of federal income tax effect (percent)	4.00%	4.00%	4.00%
Deferred tax adjustment (percent)	(41.00%)
Change in deferred tax assets as a result of change in tax law (percent)	0.00%	0.00%	(254.00%)
Valuation allowance (percent)	15.00%	(26.00%)	211.00%
Other (percent)	1.00%	1.00%	4.00%
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, 2019	Dec. 31, 2018
Income Taxes [Line Items]
Income from unconsolidated joint ventures	$ 27	$ 18
Federal and state tax carryforwards	702	763
Other	99	2
Total deferred tax assets	828	783
Valuation allowance	(828)	(783)
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, 2019	Dec. 31, 2018	Dec. 31, 2017
Numerator:
Net income	$ 152,683	$ 80,765	$ 219,959
Net income attributable to noncontrolling interests	(2,265)	(1,601)	(3,684)
Net income available to common stockholders	$ 150,418	$ 79,164	$ 216,275
Denominator:
Weighted average common shares - basic (in shares)	128,060	105,076	103,902
Net income available to common stockholders (in usd per share)	$ 1.17	$ 0.75	$ 2.08
Numerator:
Net income	$ 152,683	$ 80,765	$ 219,959
Net income attributable to noncontrolling interests	(2,265)	(1,601)	(3,684)
Net income available for common stockholders before net income attributable to noncontrolling interests in CPLP	$ 152,370	$ 80,509	$ 219,956
Denominator:
Weighted average common shares - basic (in shares)	128,060	105,076	103,902
Add:
Potential dilutive common shares - stock options (in shares)	27	48	78
Weighted average units of CPLP convertible into common shares (in shares)	1,744	1,744	1,844
Weighted average common shares - diluted (in shares)	129,831	106,868	105,824
Net income available to common stockholders (in usd per share)	$ 1.17	$ 0.75	$ 2.08
CPLP
Numerator:
Net income attributable to noncontrolling interests	$ (1,952)	$ (1,345)	$ (3,681)
Numerator:
Net income attributable to noncontrolling interests	(1,952)	(1,345)	(3,681)
Other Noncontrolling Interests
Numerator:
Net income attributable to noncontrolling interests	(313)	(256)	(3)
Numerator:
Net income attributable to noncontrolling interests	$ (313)	$ (256)	$ (3)

Earnings Per Share (Additional

Earnings Per Share (Additional Information) (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive stock options (in shares)	0	0	6,000

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, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Interest paid, net of amounts capitalized	$ 38,062	$ 43,166	$ 30,572
Income taxes paid	0	0	0
Non-Cash Transactions:
Non-cash assets and liabilities assumed in TIER transaction	1,512,373	0	0
Transfer from operating properties and related liabilities to assets and liabilities of real estate assets held for sale	318,516	0	0
Ground lease right-of-use assets and associated liabilities	56,294	0	0
Transfer from investment in unconsolidated joint venture to operating properties	50,781	0	68,498
Common stock dividends declared and accrued	42,559	27,326	25,202
Change in accrued property acquisition, development, and tenant asset expenditures	4,891	(18,104)	5,965
Non-cash consideration for property acquisition	10,071	0	0
Transfer from projects under development to operating properties	0	325,490	58,928
Cumulative effect of change in accounting principle	0	22,329	0
Transfer from investment in unconsolidated joint ventures to projects under development	$ 0	$ 7,025	$ 0

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, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents	$ 15,603	$ 2,547	$ 148,929
Restricted cash	2,005	148	56,816
Total cash, cash equivalents, and restricted cash	$ 17,608	$ 2,695	$ 205,745	$ 51,321

Reportable Segments (Segment Ne

Reportable Segments (Segment Net Operating Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total Net Operating Income	$ 431,790	$ 326,063	$ 313,206
Atlanta
Segment Reporting Information [Line Items]
Total Net Operating Income	158,045	131,564	112,984
Austin
Segment Reporting Information [Line Items]
Total Net Operating Income	93,311	60,474	58,648
Charlotte
Segment Reporting Information [Line Items]
Total Net Operating Income	77,082	62,812	62,708
Phoenix
Segment Reporting Information [Line Items]
Total Net Operating Income	37,247	36,875	34,074
Tampa
Segment Reporting Information [Line Items]
Total Net Operating Income	33,586	30,514	29,426
Dallas
Segment Reporting Information [Line Items]
Total Net Operating Income	7,473
Orlando
Segment Reporting Information [Line Items]
Total Net Operating Income			13,029
Other
Segment Reporting Information [Line Items]
Total Net Operating Income	25,046	3,824	2,337
Office
Segment Reporting Information [Line Items]
Total Net Operating Income	428,731	323,820	309,223
Office | Atlanta
Segment Reporting Information [Line Items]
Total Net Operating Income	158,093	131,564	109,706
Office | Austin
Segment Reporting Information [Line Items]
Total Net Operating Income	93,311	60,474	58,648
Office | Charlotte
Segment Reporting Information [Line Items]
Total Net Operating Income	77,082	62,812	62,708
Office | Phoenix
Segment Reporting Information [Line Items]
Total Net Operating Income	37,247	36,875	34,074
Office | Tampa
Segment Reporting Information [Line Items]
Total Net Operating Income	33,586	30,514	29,426
Office | Dallas
Segment Reporting Information [Line Items]
Total Net Operating Income	7,473
Office | Orlando
Segment Reporting Information [Line Items]
Total Net Operating Income			13,029
Office | Other
Segment Reporting Information [Line Items]
Total Net Operating Income	21,939	1,581	1,632
Mixed-Use
Segment Reporting Information [Line Items]
Total Net Operating Income	3,059	2,243	3,983
Mixed-Use | Atlanta
Segment Reporting Information [Line Items]
Total Net Operating Income	(48)	0	3,278
Mixed-Use | Austin
Segment Reporting Information [Line Items]
Total Net Operating Income	0	0	0
Mixed-Use | Charlotte
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 | Dallas
Segment Reporting Information [Line Items]
Total Net Operating Income	0
Mixed-Use | Orlando
Segment Reporting Information [Line Items]
Total Net Operating Income			0
Mixed-Use | Other
Segment Reporting Information [Line Items]
Total Net Operating Income	$ 3,107	$ 2,243	$ 705

Reportable Segments (Reconcilia

Reportable Segments (Reconciliation of Net Income to Net Operating Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting [Abstract]
Net income	$ 152,683	$ 80,765	$ 219,959
Net operating income from unconsolidated joint ventures	32,413	28,888	31,053
Fee income	(28,518)	(10,089)	(8,632)
Termination fee income	(7,228)	(1,548)	(9,270)
Other income	(246)	(1,722)	(2,248)
Reimbursed expenses	4,004	3,782	3,527
General and administrative expenses	37,007	22,040	27,523
Interest expense	53,963	39,430	33,524
Depreciation and amortization	257,149	181,382	196,745
Acquisition and transaction costs	52,881	248	1,661
Other expenses	1,109	556	1,796
Gain on extinguishment of debt	0	(8)	(2,258)
Income from unconsolidated joint ventures	(12,666)	(12,224)	(47,115)
Gain on sale of investment properties	(110,761)	(5,437)	(133,059)
Net Operating Income	$ 431,790	$ 326,063	$ 313,206

Reportable Segments (Segment Re

Reportable Segments (Segment Revenues) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total rental property revenues		$ 657,515	$ 475,212	$ 466,185
Rental property revenues
Segment Reporting Information [Line Items]
Total rental property revenues	$ 628,800	628,751	463,401	455,305
Rental property revenues | Office
Segment Reporting Information [Line Items]
Total rental property revenues		628,751	463,401	455,305
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		681,212	510,898	506,834
Rental property revenues | Operating Segments | Atlanta
Segment Reporting Information [Line Items]
Total rental property revenues		242,217	206,692	185,734
Rental property revenues | Operating Segments | Austin
Segment Reporting Information [Line Items]
Total rental property revenues		160,196	104,817	101,222
Rental property revenues | Operating Segments | Charlotte
Segment Reporting Information [Line Items]
Total rental property revenues		120,214	92,398	92,242
Rental property revenues | Operating Segments | Tampa
Segment Reporting Information [Line Items]
Total rental property revenues		54,216	49,822	47,402
Rental property revenues | Operating Segments | Phoenix
Segment Reporting Information [Line Items]
Total rental property revenues		51,586	51,238	51,209
Rental property revenues | Operating Segments | Dallas
Segment Reporting Information [Line Items]
Total rental property revenues		9,421
Rental property revenues | Operating Segments | Orlando
Segment Reporting Information [Line Items]
Total rental property revenues				24,973
Rental property revenues | Operating Segments | Other
Segment Reporting Information [Line Items]
Total rental property revenues		43,362	5,931	4,052
Rental property revenues | Operating Segments | Office
Segment Reporting Information [Line Items]
Total rental property revenues		676,574	507,174	500,598
Rental property revenues | Operating Segments | Office | Atlanta
Segment Reporting Information [Line Items]
Total rental property revenues		242,209	206,692	180,497
Rental property revenues | Operating Segments | Office | Austin
Segment Reporting Information [Line Items]
Total rental property revenues		160,196	104,817	101,222
Rental property revenues | Operating Segments | Office | Charlotte
Segment Reporting Information [Line Items]
Total rental property revenues		120,214	92,398	92,242
Rental property revenues | Operating Segments | Office | Tampa
Segment Reporting Information [Line Items]
Total rental property revenues		54,216	49,822	47,402
Rental property revenues | Operating Segments | Office | Phoenix
Segment Reporting Information [Line Items]
Total rental property revenues		51,586	51,238	51,209
Rental property revenues | Operating Segments | Office | Dallas
Segment Reporting Information [Line Items]
Total rental property revenues		9,421
Rental property revenues | Operating Segments | Office | Orlando
Segment Reporting Information [Line Items]
Total rental property revenues				24,973
Rental property revenues | Operating Segments | Office | Other
Segment Reporting Information [Line Items]
Total rental property revenues		38,732	2,207	3,053
Rental property revenues | Operating Segments | Mixed-Use
Segment Reporting Information [Line Items]
Total rental property revenues		4,638	3,724	6,236
Rental property revenues | Operating Segments | Mixed-Use | Atlanta
Segment Reporting Information [Line Items]
Total rental property revenues		8	0	5,237
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 | Dallas
Segment Reporting Information [Line Items]
Total rental property revenues		0
Rental property revenues | Operating Segments | Mixed-Use | Orlando
Segment Reporting Information [Line Items]
Total rental property revenues				0
Rental property revenues | Operating Segments | Mixed-Use | Other
Segment Reporting Information [Line Items]
Total rental property revenues		4,630	3,724	999
Rental property revenues | Segment Reconciling Items
Segment Reporting Information [Line Items]
Total rental property revenues		(52,461)	(47,497)	(51,529)
Rental property revenues | Segment Reconciling Items | Office
Segment Reporting Information [Line Items]
Total rental property revenues		(47,823)	(43,773)	(45,293)
Rental property revenues | Segment Reconciling Items | Mixed-Use
Segment Reporting Information [Line Items]
Total rental property revenues		$ (4,638)	$ (3,724)	$ (6,236)

Real Estate and Accumulated D_2

Real Estate and Accumulated Depreciation (Schedule of Properties) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 716,593
Initial Cost to Company
Land and Improvements	745,461
Buildings and Improvements	5,233,567
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	55,328
Building and Improvements less Cost of Sales, Transfers and Other	1,123,713
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	800,789
Building and Improvements less Cost of Sales, Transfers and Other	6,357,280
Total	7,158,069	$ 4,121,286	$ 3,893,799	$ 3,814,986
Accumulated Depreciation	621,617	$ 421,495	$ 275,977	$ 215,856
OPERATING PROPERTIES
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	716,593
Initial Cost to Company
Land and Improvements	582,382
Buildings and Improvements	4,651,919
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	58,768
Building and Improvements less Cost of Sales, Transfers and Other	953,394
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	641,150
Building and Improvements less Cost of Sales, Transfers and Other	5,605,313
Total	6,246,463
Accumulated Depreciation	577,139
OPERATING PROPERTIES | Austin, TX | The Domain
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	52,511
Buildings and Improvements	617,001
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	3,958
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	52,511
Building and Improvements less Cost of Sales, Transfers and Other	620,959
Total	673,470
Accumulated Depreciation	$ 10,996
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Austin, TX | The Terrace
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	27,360
Buildings and Improvements	247,226
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	2,571
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	27,360
Building and Improvements less Cost of Sales, Transfers and Other	249,797
Total	277,157
Accumulated Depreciation	$ 4,992
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Austin, TX | Tempe Gateway
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	30,938
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	232,645
Total	266,486
Accumulated Depreciation	$ 26,574
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Austin, TX | Domain Point
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	14,237
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	190,772
Total	224,261
Accumulated Depreciation	$ 20,507
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Austin, TX | 816 Congress
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 79,987
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	20,682
Building and Improvements less Cost of Sales, Transfers and Other	27,198
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	27,499
Building and Improvements less Cost of Sales, Transfers and Other	117,089
Total	144,588
Accumulated Depreciation	$ 30,234
Life on Which Depreciation in 2016 Statement of Operations is Computed	42 years
OPERATING PROPERTIES | Austin, TX | Colorado Tower
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 117,085
Initial Cost to Company
Land and Improvements	1,600
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	20,607
Building and Improvements less Cost of Sales, Transfers and Other	120,902
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	22,207
Building and Improvements less Cost of Sales, Transfers and Other	120,902
Total	143,109
Accumulated Depreciation	$ 31,909
Life on Which Depreciation in 2016 Statement of Operations is Computed	30 years
OPERATING PROPERTIES | Austin, TX | Domain Point
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	17,349
Buildings and Improvements	71,599
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	236
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	17,349
Building and Improvements less Cost of Sales, Transfers and Other	71,835
Total	89,184
Accumulated Depreciation	$ 1,725
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Austin, TX | Research Park V
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	$ 7,798
Life on Which Depreciation in 2016 Statement of Operations is Computed	30 years
OPERATING PROPERTIES | Atlanta, GA | Terminus
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 194,225
Initial Cost to Company
Land and Improvements	49,345
Buildings and Improvements	410,826
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	6,592
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	49,345
Building and Improvements less Cost of Sales, Transfers and Other	417,418
Total	466,763
Accumulated Depreciation	$ 4,028
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | Northpark
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	66,375
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	362,200
Total	384,550
Accumulated Depreciation	$ 70,498
Life on Which Depreciation in 2016 Statement of Operations is Computed	39 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	301,596
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	301,596
Total	330,153
Accumulated Depreciation	$ 19,008
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | Fifth Third Center
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	10,070
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	244,181
Total	279,245
Accumulated Depreciation	$ 30,028
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 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	20,425
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	196,578
Total	212,688
Accumulated Depreciation	$ 23,418
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | Promenade
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 95,986
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	47,224
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	150,014
Total	163,453
Accumulated Depreciation	$ 55,183
Life on Which Depreciation in 2016 Statement of Operations is Computed	34 years
OPERATING PROPERTIES | Atlanta, GA | San Jacinto Center
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	9,276
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	117,453
Total	134,289
Accumulated Depreciation	$ 14,086
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | 1200 Peachtree
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	19,495
Buildings and Improvements	62,836
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	19,495
Building and Improvements less Cost of Sales, Transfers and Other	62,836
Total	82,331
Accumulated Depreciation	$ 1,333
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	2,412
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	72,135
Total	78,842
Accumulated Depreciation	$ 9,584
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	72,953
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	72,953
Total	77,155
Accumulated Depreciation	$ 7,177
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | Meridian Mark Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 22,978
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	30,500
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	30,500
Total	32,719
Accumulated Depreciation	$ 21,933
Life on Which Depreciation in 2016 Statement of Operations is Computed	30 years
OPERATING PROPERTIES | Fort Worth, TX | Burnett Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	28,756
Buildings and Improvements	90,104
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(281)
Building and Improvements less Cost of Sales, Transfers and Other	1,611
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	28,475
Building and Improvements less Cost of Sales, Transfers and Other	91,715
Total	120,190
Accumulated Depreciation	$ 2,633
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	17,566
Building and Improvements less Cost of Sales, Transfers and Other	47,407
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	24,864
Building and Improvements less Cost of Sales, Transfers and Other	319,555
Total	344,419
Accumulated Depreciation	$ 39,254
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	5,954
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	60,648
Total	70,052
Accumulated Depreciation	$ 8,881
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	7,979
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	47,115
Total	57,915
Accumulated Depreciation	$ 5,767
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	(252)
Building and Improvements less Cost of Sales, Transfers and Other	24,476
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	12,850
Building and Improvements less Cost of Sales, Transfers and Other	287,054
Total	299,904
Accumulated Depreciation	$ 38,320
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	6,542
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	101,672
Total	107,565
Accumulated Depreciation	$ 12,089
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	(127)
Building and Improvements less Cost of Sales, Transfers and Other	16,964
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	5,949
Building and Improvements less Cost of Sales, Transfers and Other	73,611
Total	79,560
Accumulated Depreciation	$ 7,271
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Charlotte, NC | Bank of America Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	32,091
Buildings and Improvements	229,840
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(147)
Building and Improvements less Cost of Sales, Transfers and Other	4,059
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	31,944
Building and Improvements less Cost of Sales, Transfers and Other	233,899
Total	265,843
Accumulated Depreciation	$ 8,030
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Charlotte, NC | Fifth Third Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 140,332
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	21,404
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	201,834
Total	224,425
Accumulated Depreciation	$ 39,706
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Charlotte, NC | Legacy Union One
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	3,213
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	118,451
Total	118,502
Accumulated Depreciation	$ 15,325
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Houston, TX | Briarlake Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	33,486
Buildings and Improvements	196,915
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	2,855
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	33,486
Building and Improvements less Cost of Sales, Transfers and Other	199,770
Total	233,256
Accumulated Depreciation	$ 4,692
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Dallas, GA | Legacy Union One
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 66,000
Initial Cost to Company
Land and Improvements	13,049
Buildings and Improvements	128,740
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	13,049
Building and Improvements less Cost of Sales, Transfers and Other	128,740
Total	141,789
Accumulated Depreciation	$ 2,679
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Dallas, GA | 5950 Sherry Lane
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	8,040
Buildings and Improvements	65,919
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	1,077
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	8,040
Building and Improvements less Cost of Sales, Transfers and Other	66,996
Total	75,036
Accumulated Depreciation	$ 1,481
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
HELD FOR SALE
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	12,257
Buildings and Improvements	341,935
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	30,457
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	12,257
Building and Improvements less Cost of Sales, Transfers and Other	372,392
Total	384,649
Accumulated Depreciation	44,478
HELD FOR SALE | 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	28,455
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	351,754
Total	361,731
Accumulated Depreciation	44,478
HELD FOR SALE | Cherry Hill, NJ | Woodcrest
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	2,280
Buildings and Improvements	18,636
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	2,002
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	2,280
Building and Improvements less Cost of Sales, Transfers and Other	20,638
Total	22,918
Accumulated Depreciation	0
PROJECTS UNDER DEVELOPMENT
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	30,519
Buildings and Improvements	239,713
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	3
Building and Improvements less Cost of Sales, Transfers and Other	139,862
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	30,522
Building and Improvements less Cost of Sales, Transfers and Other	379,575
Total	410,097
Accumulated Depreciation	0
PROJECTS UNDER DEVELOPMENT | Austin, TX | Domain 12
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	12,725
Buildings and Improvements	138,148
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	21,100
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	12,725
Building and Improvements less Cost of Sales, Transfers and Other	159,248
Total	171,973
Accumulated Depreciation	0
PROJECTS UNDER DEVELOPMENT | Austin, TX | Domain 10
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	11,975
Buildings and Improvements	101,565
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	35,012
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	11,975
Building and Improvements less Cost of Sales, Transfers and Other	136,577
Total	148,552
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	3
Building and Improvements less Cost of Sales, Transfers and Other	83,750
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	5,822
Building and Improvements less Cost of Sales, Transfers and Other	83,750
Total	89,572
Accumulated Depreciation	0
LAND
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	120,303
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(3,443)
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	116,860
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	116,860
Accumulated Depreciation	0
LAND | Austin, TX | Domain 14 & 15
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	21,000
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	21,000
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	21,000
Accumulated Depreciation	0
LAND | Austin, TX | Domain 9
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	16,640
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	16,640
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	16,640
Accumulated Depreciation	0
LAND | Atlanta, GA | 901 West Peachtree
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	3,741
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	15,624
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	15,624
Accumulated Depreciation	0
LAND | Atlanta, GA | 3354 Peachtree
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	13,410
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	13,410
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	13,410
Accumulated Depreciation	0
LAND | Fort Worth, TX | Burnett Plaza - Adjacent Land
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	3,900
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	3,900
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	3,900
Accumulated Depreciation	0
LAND | Tampa, FL | Corporate Center 5
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
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	356
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	356
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	356
Accumulated Depreciation	0
LAND | Phoenix, AZ | 100 Mill
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	19,506
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	19,506
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	19,506
Accumulated Depreciation	0
LAND | Dallas, GA | Legacy Union 2 & 3
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	22,724
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	22,724
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	22,724
Accumulated Depreciation	0
LAND | Suburban Atlanta, GA | The Avenue Forsyth - Adjacent Land
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

Real Estate and Accumulated D_3

Real Estate and Accumulated Depreciation (Notes to Schedule III) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Real Estate
Balance at beginning of period	$ 4,121,286	$ 3,893,799	$ 3,814,986
Additions during the period:
TIER merger	2,222,989	0	0
Acquisitions	542,502	48,920	62,723
Improvements and other capitalized costs	271,720	178,567	303,940
Total Additions	3,037,211	227,487	366,663
Deductions during the period:
Cost of real estate sold	(428)	0	(287,850)
Total Deductions	428	0	287,850
Balance at end of period	7,158,069	4,121,286	3,893,799
Accumulated Depreciation
Balance at beginning of period	421,495	275,977	215,856
Additions during the period:
Depreciation expense	200,122	145,518	101,720
Total Additions	200,122	145,518	101,720
Deductions during the period:
Cost of real estate sold	0	0	(41,599)
Total Deductions	0	0	(41,599)
Balance at end of period	621,617	$ 421,495	$ 275,977
Aggregate cost for federal income tax, net of depreciation	$ 4,900,000
Buildings and Improvements | Minimum
Deductions during the period:
Useful life	30 years
Buildings and Improvements | Maximum
Deductions during the period:
Useful life	42 years

Uncategorized Items - form10-kd

Label	Element	Value
Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 22,329,000