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Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Jan. 01, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | --- | --- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Fair value | $ 69,876 |  | $ 70,687 |  |
Derivative instruments | 57 |  | 1,818 |  |
Total assets | 69,933 |  | 72,505 |  |
Financial assets: |  |  |  |  |
Loans receivable | 21,071,441 |  | 22,377,142 |  |
Total cash and cash equivalents | 160,979 | $ 120,701 | 121,347 | $ 83,537 | $ 66,752
Restricted cash - due to customers | 309,309 |  | 369,678 | $ 188,591 | $ 187,121
Accrued interest receivable | 736,901 |  | 679,197 |  |
Derivative instruments | 57 |  | 1,818 |  |
Financial liabilities: |  |  |  |  |
Bonds and notes payable | 20,910,190 | $ 22,185,558 | 22,218,740 |  |
Accrued interest payable | 52,345 |  | 61,679 |  |
Due to customers | 309,309 |  | 369,678 |  |
Level 1 |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Fair value | 3,366 |  | 2,826 |  |
Derivative instruments | 0 |  | 0 |  |
Total assets | 3,366 |  | 2,826 |  |
Level 2 |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Fair value | 52,471 |  | 52,936 |  |
Derivative instruments | 57 |  | 1,818 |  |
Total assets | 52,528 |  | 54,754 |  |
Fair value |  |  |  |  |
Financial assets: |  |  |  |  |
Loans receivable | 21,892,651 |  | 23,521,171 |  |
Total cash and cash equivalents | 160,979 |  | 121,347 |  |
Investments (at fair value) | 69,876 |  | 70,687 |  |
Beneficial interest in consumer loan securitization | 5,755 |  |  |  |
Notes receivable |  |  | 16,373 |  |
Restricted cash | 667,919 |  | 701,366 |  |
Restricted cash - due to customers | 309,309 |  | 369,678 |  |
Accrued interest receivable | 736,901 |  | 679,197 |  |
Derivative instruments | 57 |  | 1,818 |  |
Financial liabilities: |  |  |  |  |
Bonds and notes payable | 20,824,456 |  | 22,270,462 |  |
Accrued interest payable | 52,345 |  | 61,679 |  |
Due to customers | 309,309 |  | 369,678 |  |
Fair value | Level 1 |  |  |  |  |
Financial assets: |  |  |  |  |
Loans receivable | 0 |  | 0 |  |
Total cash and cash equivalents | 160,979 |  | 121,347 |  |
Investments (at fair value) | 3,366 |  | 2,826 |  |
Beneficial interest in consumer loan securitization | 0 |  |  |  |
Notes receivable |  |  | 0 |  |
Restricted cash | 667,919 |  | 701,366 |  |
Restricted cash - due to customers | 309,309 |  | 369,678 |  |
Accrued interest receivable | 0 |  | 0 |  |
Derivative instruments | 0 |  | 0 |  |
Financial liabilities: |  |  |  |  |
Bonds and notes payable | 0 |  | 0 |  |
Accrued interest payable | 0 |  | 0 |  |
Due to customers | 309,309 |  | 369,678 |  |
Fair value | Level 2 |  |  |  |  |
Financial assets: |  |  |  |  |
Loans receivable | 0 |  | 0 |  |
Total cash and cash equivalents | 0 |  | 0 |  |
Investments (at fair value) | 52,471 |  | 52,936 |  |
Beneficial interest in consumer loan securitization | 0 |  |  |  |
Notes receivable |  |  | 16,373 |  |
Restricted cash | 0 |  | 0 |  |
Restricted cash - due to customers | 0 |  | 0 |  |
Accrued interest receivable | 736,901 |  | 679,197 |  |
Derivative instruments | 57 |  | 1,818 |  |
Financial liabilities: |  |  |  |  |
Bonds and notes payable | 20,824,456 |  | 22,270,462 |  |
Accrued interest payable | 52,345 |  | 61,679 |  |
Due to customers | 0 |  | 0 |  |
Fair value | Level 3 |  |  |  |  |
Financial assets: |  |  |  |  |
Loans receivable | 21,892,651 |  | 23,521,171 |  |
Total cash and cash equivalents | 0 |  | 0 |  |
Investments (at fair value) | 0 |  | 0 |  |
Beneficial interest in consumer loan securitization | 5,755 |  |  |  |
Notes receivable |  |  | 0 |  |
Restricted cash | 0 |  | 0 |  |
Restricted cash - due to customers | 0 |  | 0 |  |
Accrued interest receivable | 0 |  | 0 |  |
Derivative instruments | 0 |  | 0 |  |
Financial liabilities: |  |  |  |  |
Bonds and notes payable | 0 |  | 0 |  |
Accrued interest payable | 0 |  | 0 |  |
Due to customers | 0 |  | 0 |  |
Carrying value |  |  |  |  |
Financial assets: |  |  |  |  |
Loans receivable | 21,071,441 |  | 22,377,142 |  |
Total cash and cash equivalents | 160,979 |  | 121,347 |  |
Investments (at fair value) | 69,876 |  | 70,687 |  |
Beneficial interest in consumer loan securitization | 5,755 |  |  |  |
Notes receivable |  |  | 16,373 |  |
Restricted cash | 667,919 |  | 701,366 |  |
Restricted cash - due to customers | 309,309 |  | 369,678 |  |
Accrued interest receivable | 736,901 |  | 679,197 |  |
Derivative instruments | 57 |  | 1,818 |  |
Financial liabilities: |  |  |  |  |
Bonds and notes payable | 20,910,190 |  | 22,218,740 |  |
Accrued interest payable | 52,345 |  | 61,679 |  |
Due to customers | 309,309 |  | 369,678 |  |
Student loan and other asset-backed securities - available-for-sale |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Fair value | 52,471 |  | 52,936 |  |
Student loan and other asset-backed securities - available-for-sale | Level 1 |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Fair value | 0 |  | 0 |  |
Student loan and other asset-backed securities - available-for-sale | Level 2 |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Fair value | 52,471 |  | 52,936 |  |
Equity securities |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Fair value | 3,263 |  | 2,722 |  |
Equity securities | Level 1 |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Fair value | 3,263 |  | 2,722 |  |
Equity securities | Level 2 |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Fair value | 0 |  | 0 |  |
Equity securities measured at net asset value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Fair value | 14,039 |  | 14,925 |  |
Debt securities - available-for-sale |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Fair value | 103 |  | 104 |  |
Debt securities - available-for-sale | Level 1 |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Fair value | 103 |  | 104 |  |
Debt securities - available-for-sale | Level 2 |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Fair value | $ 0 |  | $ 0 |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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