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Equity Method Investment, Cash Contributed by Third Party

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Equity Method Investment, Equity Contributed, Value

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Equity Method Investment, Real Estate Held-for-Sale

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Impairment of Real Estate, Reserve for Capital Expenditures

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Number of subsidiaries owned by the company.

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Number of Office Buildings Held for Sale

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

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-Name Accounting Standards Codification
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Amount of long-term debt due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the aggregate value of each identified investment accounted for under the equity method of accounting based on the quoted market price for those investments in common stock for which a quoted market price is available.

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Gross amount of debt extinguished.

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This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments.

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The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes.

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The charge against earnings in the period to reduce the carrying amount of real property to fair value.

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The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

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Cash received for the sale of real estate that is not part of an investing activity during the current period.

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The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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Unconsolidated Affiliates, Redeemable Interests, Noncontrolling Interests and Cost Method Investments (Unconsolidated Affiliates) (Narrative) (Details) $ in Thousands	1 Months Ended				3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2016 USD ($) subsidiary office_building	Apr. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Feb. 29, 2016 USD ($)	Sep. 30, 2016 USD ($) subsidiary office_building	Mar. 31, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) subsidiary office_building	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Jun. 30, 2016 USD ($)
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest in real estate property	50.00%				50.00%			50.00%
Net proceeds from sale of real estate								$ 149,972		$ 103,537
Gain on sales of real estate assets					$ 4,926		$ 3,237	14,503	$ 18,167
Loss on impairment					53,558		884	116,736	3,665
Net investment in real estate assets	$ 25,392				25,392			25,392		0
Mortgage and other indebtedness amount carrying value	$ 1,294,531				1,294,531			1,294,531		1,241,379
Gain on investment					$ 0		0	$ 0	$ 16,560
High Pointe Commons, LP and High Pointe Commons II-HAP, LP
Schedule of Equity Method Investments [Line Items]
Number of subsidiaries owned by the company \| subsidiary	2				2			2
G&I VIII CBL Triangle LLC
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest in real estate property	10.00%				10.00%			10.00%
River Ridge Mall
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest in real estate property	25.00%				25.00%			25.00%
CBL-TRS Joint Venture, LLC
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest in real estate property	50.00%				50.00%			50.00%
Number of office buildings held for sale \| office_building	4				4			4
JG Gulf Coast Town Center LLC
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest in real estate property	50.00%				50.00%			50.00%
Gain on investment							$ 29,267
River Ridge Mall
Schedule of Equity Method Investments [Line Items]
Net proceeds from sale of real estate			$ 32,905
Loss on impairment						$ 9,510
Reserve for capital expenditures						$ 2,100
Ownership percentage sold			75.00%					75.00%
Mortgages \| Renaissance Center - Phase I
Schedule of Equity Method Investments [Line Items]
Debt retired		$ 31,641
Mortgages \| High Pointe Commons
Schedule of Equity Method Investments [Line Items]
Debt retired	$ 17,388
Non-recourse loan
Schedule of Equity Method Investments [Line Items]
Mortgage and other indebtedness amount carrying value	$ 19,155				$ 19,155			$ 19,155		$ 16,840
Non-recourse loan \| JG Gulf Coast Town Center LLC
Schedule of Equity Method Investments [Line Items]
Mortgage and other indebtedness amount carrying value											$ 190,800
Parent Company \| High Pointe Commons
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest in real estate property	50.00%				50.00%			50.00%
Parent Company \| Renaissance Center
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest in real estate property		50.00%
Parent Company \| G&I VIII CBL Triangle LLC
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest in real estate property				10.00%
Parent Company \| Triangle Town Center LLC
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest in real estate property			50.00%	50.00%		50.00%
Parent Company \| River Ridge Mall
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest in real estate property			25.00%			25.00%
Parent Company \| Mortgages \| G&I VIII CBL Triangle LLC
Schedule of Equity Method Investments [Line Items]
Mortgage note payables assumed				$ 17,109
Corporate Joint Venture \| High Pointe Commons
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest in real estate property	50.00%				50.00%			50.00%
Sales price	$ 33,800				$ 33,800			$ 33,800
Net proceeds from sale of real estate	14,962
Gain on sales of real estate assets	16,732
Corporate Joint Venture \| Renaissance Center
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest in real estate property		5000.00%
Sales price		$ 129,200
Net proceeds from sale of real estate		80,324
Gain on sales of real estate assets		58,876
Corporate Joint Venture \| G&I VIII CBL Triangle LLC
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest in real estate property				90.00%
Sales price				$ 174,000
Value of equity contributed				$ 3,060
Corporate Joint Venture \| Triangle Town Center LLC
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest in real estate property				50.00%
Corporate Joint Venture \| River Ridge Mall
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest in real estate property			75.00%			75.00%
Corporate Joint Venture \| River Ridge Mall
Schedule of Equity Method Investments [Line Items]
Cash contributed by third party						$ 33,500
Value of equity method investment			$ 7,000			7,000
Cash used to reduce balances on lines of credit						$ 32,819
Corporate Joint Venture \| Mortgages \| Renaissance Center
Schedule of Equity Method Investments [Line Items]
Mortgage note payables assumed		16,000
Corporate Joint Venture \| Mortgages \| G&I VIII CBL Triangle LLC
Schedule of Equity Method Investments [Line Items]
Mortgage note payables assumed				$ 171,092
Corporate Joint Venture \| Other Ownership Interest \| High Pointe Commons
Schedule of Equity Method Investments [Line Items]
Net proceeds from sale of real estate	7,481
Gain on sales of real estate assets	$ 8,366
Corporate Joint Venture \| Other Ownership Interest \| Renaissance Center
Schedule of Equity Method Investments [Line Items]
Net proceeds from sale of real estate		40,162
Gain on sales of real estate assets		$ 29,438
Corporate Joint Venture \| Other Ownership Interest \| G&I VIII CBL Triangle LLC
Schedule of Equity Method Investments [Line Items]
Mortgage note payables assumed				$ 85,546
CBL & Associates Properties, Inc. \| Non-recourse loan \| JG Gulf Coast Town Center LLC
Schedule of Equity Method Investments [Line Items]
Mortgage and other indebtedness amount carrying value											$ 95,400