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VARIABLE INTEREST ENTITIES - Summary of Unconsolidated VIEs (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Variable Interest Entity [Line Items] |  |
Cash and cash equivalents | $ 220,819 | $ 373,472
Equipment, net of depreciation | 121,520 | 128,021
Other assets | 194,014 | 185,946
Total assets | 7,877,334 | 7,828,410
Total unconsolidated liabilities | 6,980,127 | 6,921,165
Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Cash and cash equivalents | 3,228 | 4,224
Equipment, net of depreciation | 241,015 | 248,920
Other assets | 7,470 | 6,301
Total assets | 251,713 | 259,445
Total unconsolidated liabilities | 6,357 | 7,143
Maximum loss exposure | $ 27,977 | $ 32,525

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