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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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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset 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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Balance held at close of period in number of shares.

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Sum of the carrying amounts as of the balance sheet date of all investments.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes loans held for sale. Excludes loans and leases covered under loss sharing agreements.

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Amount of income (expense) related to nonoperating activities, classified as other.

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Colony Credit - Narrative (Details) $ in Thousands			12 Months Ended
Colony Credit - Narrative (Details) $ in Thousands	Feb. 01, 2019	Jan. 31, 2018 USD ($) shares	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans receivable, net			$ 1,659,217	$ 3,223,762
Other gain (loss), net			$ 51,706	$ (25,814)	$ 18,416
Colony Credit
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage			36.60%
Equity Method Investment \| Colony Credit
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Other gain (loss), net		$ 9,900
NorthStar I Stockholders
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans receivable, net		$ 150,200
Commercial Real Estate Credit REIT (Combination)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage		37.00%
Commercial Real Estate Credit REIT (Combination) \| NorthStar I Stockholders
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage		32.00%
Commercial Real Estate Credit REIT (Combination) \| NorthStar Income II Stockholders
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage		31.00%
Common Class B-3 \| Equity Method Investment \| Colony Credit
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity method investment, shares owned \| shares		44,399,444
Common Membership Units \| Equity Method Investment \| Colony Credit
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity method investment, shares owned \| shares		3,075,623
Senior Participation Interest \| NorthStar I Excluded Asset
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investments		$ 65,000
Investment management contracts
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Write-off of intangible assets		$ 139,000
Subsequent Event \| Common Class B-3 \| Commercial Real Estate Credit REIT (Combination) \| Colony Credit
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Stock conversion ratio	1
Subsequent Event \| Common Membership Units \| Commercial Real Estate Credit REIT (Combination) \| Colony Credit
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Stock conversion ratio	1