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Commitments and Contingencies (Unfunded Commitments) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Percentage of capital committed to strategic investments that may be drawn down	100.00%
Unfunded Financial Commitments [Line Items]
Performance-Based Commitments	$ 449,520
Strategic Investments	39,754
Total	489,274
Loans and Other Lending Investments
Unfunded Financial Commitments [Line Items]
Performance-Based Commitments	436,910
Strategic Investments	0
Total	436,910
Real Estate
Unfunded Financial Commitments [Line Items]
Performance-Based Commitments	12,610
Strategic Investments	0
Total	12,610
Other Investments
Unfunded Financial Commitments [Line Items]
Performance-Based Commitments	0
Strategic Investments	39,754
Total	39,754
Loan Participations Payable
Unfunded Financial Commitments [Line Items]
Performance-Based Commitments	$ 27,400

X

- Definition

Represents the off-balance sheet maximum other commitments of the entity.

+ References

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+ Details

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- Definition

Represents the percentage of capital committed to strategic investments by the entity that may be drawn down.

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No definition available.

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X

- Definition

Represents the off-balance sheet unfunded maximum amount of funds for construction and development loans and build-outs of space in net lease assets over a period of time if and when the borrowers and tenants meet established milestones and other performance criteria.

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No definition available.

+ Details

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- Definition

Represents certain off-balance sheet unfunded commitments of the entity.

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No definition available.

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