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Commitments and Contingencies (Unfunded Commitments) (Details) $ in Thousands	Mar. 31, 2018 USD ($)
Other Commitments [Line Items]
Performance-Based Commitments	$ 471,856
Strategic Investments	9,427
Total	481,283
Loans and Other Lending Investments
Other Commitments [Line Items]
Performance-Based Commitments	436,639
Strategic Investments	0
Total	436,639
Real Estate
Other Commitments [Line Items]
Performance-Based Commitments	10,630
Strategic Investments	0
Total	10,630
Other Investments
Other Commitments [Line Items]
Performance-Based Commitments	24,587
Strategic Investments	9,427
Total	34,014
Loan participations, not the obligation of the Company
Other Commitments [Line Items]
Performance-Based Commitments	$ 83,700

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- Definition

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- 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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- Definition

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