220 Central Park South - Narrative (Details) ft² in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
Dec. 31, 2018 USD ($) ft²	Dec. 31, 2018 USD ($) ft² unit	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Real Estate [Line Items]
Income tax expense		$ 37,633	$ 42,375	$ 7,923
Repayments of construction loan		74,609	0	0
Cash payments for income taxes		$ 62,225	$ 6,727	$ 9,716
220 Central Park South
Real Estate [Line Items]
Square footage of real estate property \| ft²	397	397
Development costs, cumulative	$ 1,400,000	$ 1,400,000
Development costs expended	1,200,000	$ 1,200,000
Number of units sold \| unit		11
Cash proceeds from sale of real estate		$ 214,776
Net gains on sale of real estate		81,224
Income tax expense		13,888
Repayments of construction loan		213,000
Construction loan	950,000	$ 950,000
Cash payments for income taxes	$ 52,200
Percentage of condominiums under sales contracts	83.00%	83.00%

Area of a real estate property.

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- Definition

This element represents the carrying value of a short-term real estate loan to finance building costs. The funds are disbursed as needed or in accordance with a prearranged plan; generally, a portion of the funds is disbursed at inception and the remainder as construction progresses. The money is repaid on completion of the project, usually from the proceeds of a mortgage loan. The rate is normally higher than the prime rate, and there is usually an origination fee. The effective yield on these loans tends to be high, and the lender has a security interest in the real property. Note that there are separate concepts for the current and noncurrent portions of long-term construction loans.

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- Definition

The capitalized costs incurred (excluded from amortization), as of the date of the balance sheet, to obtain access to proved reserves and to provide facilities for extracting, treating, gathering and storing the oil and gas.

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- Definition

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

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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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- Definition

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

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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 cash outflow from repayment of borrowings to finance the cost of construction.

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- Definition

Development Costs Expended

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No definition available.

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- Definition

Number of Units Sold

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No definition available.

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- Definition

Percentage of Condominiums under Sales Contracts

+ References

No definition available.

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