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LOANS - Investment Loan Activity (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward] |  |
Beginning balance | $ 4,585,975 | [1]
Purchases | 4,384,684 |
Sales and transfers | (3,768,246) |
Principal payments | (726,064) |
Gains / (losses) | (20,835) |
(Amortization) / accretion | (6,836) |
Ending balance, carrying value | 669,713 |
Ending balance | 4,462,350 | [1]
Residential |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward] |  |
Beginning balance | 1,359,806 |
Purchases | 2,905,112 |
Sales and transfers | (2,417,798) |
Principal payments | (190,336) |
Gains / (losses) | (6,130) |
(Amortization) / accretion | 2,867 |
Ending balance | 1,647,787 |
Commercial |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward] |  |
Beginning balance | 1,338,987 |
Purchases | 589,530 |
Sales and transfers | (1,085,230) |
Principal payments | (166,801) |
Gains / (losses) | (9,207) |
(Amortization) / accretion | (2,434) |
Ending balance | 669,713 |
Corporate |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward] |  |
Beginning balance | 1,887,182 |
Purchases | 890,042 |
Sales and transfers | (265,218) |
Principal payments | (368,927) |
Gains / (losses) | (5,498) |
(Amortization) / accretion | (7,269) |
Ending balance | $ 2,144,850 |
[1] | Includes $66.7 million and $97.5 million of residential mortgage loans held for sale and $0 and $42.2 million of commercial mortgage loans held for sale at December 31, 2019 and 2018, respectively.

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- Definition Amount of decrease in investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from collection of principal. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Footnote 6 -Subsection 29 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29(Footnote 6)) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
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- Definition Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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