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Fair Value of Financial Instruments - Summary of Carrying Values and Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financial assets |  |  |
Equity investments |  | $ 9,746 | $ 10,079
Investment securities |  | 46,792 | 48,998
Loans receivable |  | 1,229,838 | 1,160,855
Carrying Amount [Member] |  |  |
Financial assets |  |  |
Cash, cash equivalents, and federal funds sold | [1] | 112,040 | 67,821
Equity investments |  | 9,746 | 10,079
Investment securities |  | 46,792 | 48,998
Loans receivable |  | 1,172,290 | 1,114,762
Accrued interest receivable | [2] | 10,338 | 8,662
Financial liabilities |  |  |
Funds borrowed | [3] | 1,312,255 | 1,169,593
Accrued interest payable | [2] | 4,673 | 4,398
Fair Value Recurring [Member] |  |  |
Financial assets |  |  |
Cash, cash equivalents, and federal funds sold | [1] | 112,040 | 67,821
Equity investments |  | 9,746 | 10,079
Investment securities |  | 46,792 | 48,998
Loans receivable |  | 1,172,290 | 1,114,762
Accrued interest receivable | [2] | 10,338 | 8,662
Financial liabilities |  |  |
Funds borrowed | [3] | 1,312,591 | 1,171,274
Accrued interest payable | [2] | $ 4,673 | $ 4,398
[1] | Categorized as level 1 within the fair value hierarchy, excluding $1,500 of interest-bearing deposits categorized as level 2. See Note 17.
[2] | Categorized as level 3 within the fair value hierarchy. See Note 17.
[3] | As of December 31, 2020 and 2019, publicly traded unsecured notes traded at a premium to par of $336 and $1,681.

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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599 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 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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