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v3.19.1

Commercial Mortgage and Subordinate Loans, Net - Schedule of Mortgage Loans by Property Type and Geographic Distribution (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 5,186,999 | $ 4,927,593
% of Portfolio | 100.00% | 100.00%
Hotel [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 1,330,842 | $ 1,286,590
% of Portfolio | 25.70% | 26.10%
Residential-for-sale: construction [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 631,501 | $ 528,510
% of Portfolio | 12.10% | 10.70%
Residential-for-sale: inventory [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 421,815 | $ 577,053
% of Portfolio | 8.10% | 11.70%
Office [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 956,989 | $ 832,620
% of Portfolio | 18.50% | 16.90%
Urban Predevelopment [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 610,888 | $ 683,886
% of Portfolio | 11.80% | 13.90%
Multifamily [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 521,087 | $ 448,899
% of Portfolio | 10.00% | 9.10%
Industrial [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 227,206 | $ 32,000
% of Portfolio | 4.40% | 0.60%
Retail Center [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 156,008 | $ 156,067
% of Portfolio | 3.00% | 3.20%
Healthcare [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 144,310 | $ 156,814
% of Portfolio | 2.80% | 3.20%
Mixed Use [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 114,284 | $ 73,957
% of Portfolio | 2.20% | 1.50%
Other [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 72,069 | $ 151,197
% of Portfolio | 1.40% | 3.10%
Manhattan, NY [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 1,825,136 | $ 1,669,145
% of Portfolio | 35.20% | 33.90%
Brooklyn, NY [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 547,139 | $ 346,056
% of Portfolio | 10.50% | 7.00%
Northeast [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 18,751 | $ 23,479
% of Portfolio | 0.40% | 0.50%
West [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 635,733 | $ 614,160
% of Portfolio | 12.30% | 12.50%
Midwest [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 617,599 | $ 631,710
% of Portfolio | 11.90% | 12.80%
Southeast [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 567,794 | $ 559,043
% of Portfolio | 10.90% | 11.30%
Southwest [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 120,127 | $ 96,345
% of Portfolio | 2.30% | 2.00%
Mid Atlantic [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 110,754 | $ 211,775
% of Portfolio | 2.10% | 4.30%
UNITED KINGDOM |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 668,507 | $ 700,460
% of Portfolio | 12.90% | 14.20%
Other International [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Carrying value | $ 75,459 | $ 75,420
% of Portfolio | 1.50% | 1.50%

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- Definition 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. + References No definition available. + Details
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- Definition The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(c)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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