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Loans Receivable and Other Lending Investments, net (Impaired Loans) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Financing Receivable, Impaired [Line Items] |  |  |  |  |  |
Loans modified through troubled debt restructurings |  |  |  |  |  | $ 10,400
Average Recorded Investment |  | $ 178,862 | $ 267,478 | $ 158,610 | $ 493,799 |
Interest Income Recognized |  | 4 | 1,292 | 50 | 2,219 |
Senior mortgages |  |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |  |
Average Recorded Investment |  | 128,969 | 233,148 | 129,730 | 429,851 |
Interest Income Recognized |  | 4 | 1,252 | 38 | 2,062 |
Corporate/Partnership loans |  |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |  |
Average Recorded Investment |  | 49,893 | 34,330 | 28,880 | 63,948 |
Interest Income Recognized |  | 0 | 40 | 12 | 157 |
With no related allowance recorded | Senior mortgages |  |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |  |
Average Recorded Investment |  | 0 | 40,635 | 0 | 44,574 |
Interest Income Recognized |  | 0 | 1,234 | 0 | 1,922 |
With an allowance recorded |  |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |  |
Recorded Investment | [1] | 178,136 |  | 178,136 |  | 139,672
Unpaid Principal Balance | [1] | 177,178 |  | 177,178 |  | 138,801
Related Allowance | [1] | (95,520) |  | (95,520) |  | (64,990)
Average Recorded Investment |  | 178,862 | 226,843 | 158,610 | 449,225 |
Interest Income Recognized |  | 4 | 58 | 50 | 297 |
With an allowance recorded | Senior mortgages |  |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |  |
Recorded Investment | [1] | 128,243 |  | 128,243 |  | 130,645
Unpaid Principal Balance | [1] | 127,285 |  | 127,285 |  | 129,744
Related Allowance | [1] | (69,627) |  | (69,627) |  | (64,440)
Average Recorded Investment |  | 128,969 | 192,513 | 129,730 | 385,277 |
Interest Income Recognized |  | 4 | 18 | 38 | 140 |
With an allowance recorded | Corporate/Partnership loans |  |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |  |
Recorded Investment | [1] | 49,893 |  | 49,893 |  | 9,027
Unpaid Principal Balance | [1] | 49,893 |  | 49,893 |  | 9,057
Related Allowance | [1] | (25,893) |  | (25,893) |  | $ (550)
Average Recorded Investment |  | 49,893 | 34,330 | 28,880 | 63,948 |
Interest Income Recognized |  | $ 0 | $ 40 | $ 12 | $ 157 |
[1] | All of the Company's non-accrual loans are considered impaired and included in the table above. As of December 31, 2014, impaired loans also includes certain loans modified through troubled debt restructurings in accordance with GAAP with a recorded investment of $10.4 million although they are performing and on accrual status. The Company did not have impaired loans without related allowances recorded.

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- Definition The interest income recognized on a cash-basis or accrual method of accounting during the time within that period that the financing receivables were impaired. + References No definition available. + Details
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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 amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5258-111524 + Details
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