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Loans Receivable and Other Lending Investments, net (Reserve for Loan Losses) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Allowance for Loan Losses [Roll Forward] |  |  |
Provision for (recovery of) loan losses | $ 1,753 | $ (8,296) | $ 37,616
Charge-offs | (2,709) | (18,370) | (28,513)
Recoveries of previously recorded loan loss reserves |  | 13,700 | 600
Loans Receivable Allowance |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |
Reserve for loan losses at beginning of period | 85,545 | 108,165 | 98,490
Provision for (recovery of) loan losses | (5,828) | (12,514) | 36,567
Charge-offs | (1,228) | (10,106) | (26,892)
Reserve for loan losses at end of period | $ 78,489 | $ 85,545 | $ 108,165

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- Definition The allowance for loan losses represents the reserve to cover probable credit losses related to specifically identified loans, as well as probable credit losses inherent in the remainder of the loan portfolio as of the balance sheet date. + References No definition available. + Details
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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of increase in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from charges to costs and expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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