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BUSINESS COMBINATIONS - Additional Information - Narrative (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Aug. 30, 2019 | Apr. 01, 2018 | Sep. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  | $ 1,059,504 |  |  |  |  |
Cash consideration | $ 53,700 | 43 |  |  |  |  |
Stock consideration | 60,900 | 1,043,424 |  |  |  |  |
Total assets acquired | 74,900 | 4,402,804 |  |  |  |  |
Total liabilities assumed | 18,400 | 4,018,943 |  |  | $ 0 | $ 18,380 | $ 4,018,948
Goodwill | 58,000 | 675,643 | $ 58,000 | $ 676,200 | $ 0 | $ 57,520 | $ 676,167
Loans |  | 2,792,572 |  |  |  |  |
Business Combination, Acquired Receivables, Gross Contractual Amount |  | $ 2,900,000 |  |  |  |  |
Bannockburn [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business Combination, Consideration Transferred | $ 114,600 |  |  |  |  |  |

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- Definition Fair value of acquired receivable from business combination, excluding certain loans and debt securities acquired in transfer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
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- Definition For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the gross contractual amounts receivable, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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