Property Dispositions and Discontinued Operations - Additional Information (Details) $ in Thousands	12 Months Ended
Dec. 31, 2016 USD ($) Property	Dec. 31, 2015 USD ($) Property	Dec. 31, 2014 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of property	$ 370,038	$ 156,461	$ 226,375
Aggregate gain on sale of properties	81,510	24,884	57,507
Impairment charges on real estate	73,772	34,857	45,004
Gain (loss) on debt extinguishment on sale of properties	$ (532)	$ 21,498	(671)
Properties classified as held-for-sale (in number of properties) \| Property	2	2
Other asset impairment charges	$ 26,423	$ 1,975	3,596
LCIF [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of property	238,891		40,836
Aggregate gain on sale of properties	36,380	0	17,944
Impairment charges on real estate	72,072	$ 787
Gain (loss) on debt extinguishment on sale of properties	$ 7,388
Properties classified as held-for-sale (in number of properties) \| Property	0	0
Impaired, interest income		$ 14	1,752
Greenville, South Carolina [Member] \| LCIF [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of property			11,491
Southfield, Michigan [Member] \| LCIF [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Provision for loan losses			$ 2,500
Land [Member] \| New York, New York [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charges on real estate	$ 65,500
Number of properties sold \| Property	3
Land [Member] \| New York, New York [Member] \| LCIF [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charges on real estate	$ 65,500
Number of properties sold \| Property	3

Discontinued Operations, Gain (Loss) on Debt Extinguishment on Sale of Properties, Net

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- Definition

Number of Real Estate Properties, Held For Sale

+ References

No definition available.

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Real Estate, Number of Properties Sold

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- Definition

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

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

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No definition available.

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- Definition

The gross interest income that would have been recorded in the period on troubled debt restructurings, if the loans had been current in accordance with their original terms and had been outstanding throughout the period or since origination, if held for part of the period.

+ References

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The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

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- Definition

The cash inflow from the sale of formerly productive land held for sale, anything permanently fixed to it, including buildings, structures on it, and so forth.

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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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