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Loans Receivable and Other Lending Investments, net (Credit Characteristics by Payment Status) (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) loan | Dec. 31, 2016 USD ($) loan
Recorded investment in loans, aged by payment status and presented by class |  |
Current | $ 1,062,944 | $ 1,229,180
Less Than and Equal to 90 Days | 0 | 0
Greater Than 90 Days | 231,877 | 233,823
Total Past Due | 231,877 | 233,823
Financing receivable, total | $ 1,294,821 | $ 1,463,003
Financing receivable, number of loans greater than 90 days past due | loan | 4 | 4
Financing receivables, past due time period | 90 days | 90 days
Minimum |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Financing receivables, past due time period | 1 year | 1 year
Maximum |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Financing receivables, past due time period | 9 years | 8 years
Senior mortgages |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Current | $ 719,057 | $ 868,505
Less Than and Equal to 90 Days | 0 | 0
Greater Than 90 Days | 75,343 | 76,677
Total Past Due | 75,343 | 76,677
Financing receivable, total | 794,400 | 945,182
Corporate/Partnership loans |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Current | 334,364 | 335,677
Less Than and Equal to 90 Days | 0 | 0
Greater Than 90 Days | 156,534 | 157,146
Total Past Due | 156,534 | 157,146
Financing receivable, total | 490,898 | 492,823
Subordinate mortgages |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Current | 9,523 | 24,998
Less Than and Equal to 90 Days | 0 | 0
Greater Than 90 Days | 0 | 0
Total Past Due | 0 | 0
Financing receivable, total | $ 9,523 | $ 24,998

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- Definition Financing receivables that are current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524 + Details
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- Definition Recorded Investment in financing receivables that are past due at the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524 + Details
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- Definition Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(3)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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