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RELATED-PARTY TRANSACTIONS - LAFC Financing (Details) - USD ($) $ in Thousands			12 Months Ended
	Mar. 31, 2017	Aug. 22, 2016	Dec. 31, 2032	Dec. 31, 2031	Dec. 31, 2030	Dec. 31, 2029	Dec. 31, 2028	Dec. 31, 2027	Dec. 31, 2026	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Nov. 24, 2017	Aug. 08, 2016
Related Party Transaction [Line Items]
Deposits																		$ 7,292,903	$ 9,142,150
Los Angeles Football Club (LAFC) Naming Rights, Revenue Rights, And Other Sponsorship Rights
Related Party Transaction [Line Items]
Term of naming and sponsorship agreement		15 years																15 years
Renewal term of the naming and sponsorship agreement		10 years
Future annual payments for naming rights, revenue rights and other sponsorship rights	$ 10,000																	$ 10,000
Los Angeles Football Club (LAFC) Naming Rights, Revenue Rights, And Other Sponsorship Rights | Scenario, Forecast
Related Party Transaction [Line Items]
Future annual payments for naming rights, revenue rights and other sponsorship rights			$ 6,700	$ 6,600	$ 6,500	$ 6,400	$ 6,300	$ 6,200	$ 6,100	$ 6,000	$ 5,900	$ 5,800	$ 5,700	$ 5,600	$ 5,500	$ 5,400	$ 5,300
Stadco Loan | Immediate Family Member of Chief Executive Officer, Brother | Los Angeles Football Club (LAFC)
Related Party Transaction [Line Items]
Committed line of credit																					$ 40,300
Committed line of credit, maximum borrowing																					145,000
Outstanding advances																		23,300	0
Largest amount of principal outstanding																		23,500	0
Unused loan fees																		295	59
Interest income																		325	0
Team Loan | Immediate Family Member of Chief Executive Officer, Brother | Los Angeles Football Club (LAFC)
Related Party Transaction [Line Items]
Committed line of credit																					9,700
Committed line of credit, maximum borrowing																					$ 35,000
Outstanding advances																		5,400	0
Largest amount of principal outstanding																		5,500	0
Unused loan fees																		140	18
Interest income																		83	0
Various Entities Affiliated With LAFC | Affiliated Entity
Related Party Transaction [Line Items]
Deposits																		33,100	$ 76,000
Standby Letters of Credit
Related Party Transaction [Line Items]
Letters of credit																				$ 100
Los Angeles Football Club (LAFC) | Corporate Credit Card | Line of Credit
Related Party Transaction [Line Items]
Amount of available line of credit																		$ 100

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