Debt Instrument, Weighted Average Maturity Period

No definition available.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
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-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt premium.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

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Period Type:	instant

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