FAIR VALUE - Summary of assets and liabilities measured at fair value on a recurring or nonrecurring, the significant unobservable inputs (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	$ 56,211	$ 36,666
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	8,325	6,044
Nonrecurring | Management discount for asset/property type | Level 3 | Commercial and Industrial | Sales Comparison, Market Approach [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Estimate	$ 439
Nonrecurring | Minimum | Management discount for asset/property type | Level 3 | Commercial and Industrial | Sales Comparison, Market Approach [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range and weighted average of discount rate	17.00%
Nonrecurring | Maximum | Management discount for asset/property type | Level 3 | Commercial and Industrial | Sales Comparison, Market Approach [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range and weighted average of discount rate	45.00%
Nonrecurring | Weighted Average | Management discount for asset/property type | Level 3 | Commercial and Industrial | Sales Comparison, Market Approach [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range and weighted average of discount rate	39.00%
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	$ 56,211	36,666
Guarantee asset, Fair Value	237	232
Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	2,113
Guarantee asset, Fair Value	237	$ 232
Recurring | Level 3 | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Guarantee assets		3.00%
Recurring | Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Guarantee asset, Fair Value		$ 232
Recurring | Discount rate | Level 3 | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Guarantee asset, Fair Value	$ 237
Guarantee assets	3.00%
Recurring | Prepayment rate | Level 3 | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Guarantee assets	18.00%	25.00%
Recurring | Management discount for asset/property type | Commercial and Industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Estimate		$ 1,800
Recurring | Commission, Cost To Sell, Closing Costs [Member] | Commercial properties
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Estimate		$ 194
Recurring | Commission, Cost To Sell, Closing Costs [Member] | Level 3 | Commercial properties
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range and weighted average of discount rate		5.00%
Recurring | Minimum | Management discount for asset/property type | Level 3 | Commercial and Industrial | Sales Comparison, Market Approach [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range and weighted average of discount rate		17.00%
Recurring | Maximum | Management discount for asset/property type | Level 3 | Commercial and Industrial | Sales Comparison, Market Approach [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range and weighted average of discount rate		35.00%
Recurring | Weighted Average | Level 3 | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Guarantee assets		3.00%
Recurring | Weighted Average | Discount rate | Level 3 | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Guarantee assets	3.00%
Recurring | Weighted Average | Prepayment rate | Level 3 | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Guarantee assets	18.00%	25.00%
Recurring | Weighted Average | Management discount for asset/property type | Level 3 | Commercial and Industrial | Sales Comparison, Market Approach [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range and weighted average of discount rate		26.00%
Recurring | Weighted Average | Commission, Cost To Sell, Closing Costs [Member] | Level 3 | Commercial properties
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range and weighted average of discount rate		5.00%
Recurring | IRLC,net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets, Fair Value	$ 1,473	$ 9,841
Recurring | IRLC,net | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets, Fair Value	1,473	9,841
Recurring | IRLC,net | Pull through
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets, Fair Value		$ 9,841
Recurring | IRLC,net | Pull through | Level 3 | Best execution model
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets, Fair Value	$ 1,473
Recurring | IRLC,net | Minimum | Pull through | Level 3 | Best execution model
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	71	55
Recurring | IRLC,net | Maximum | Pull through | Level 3 | Best execution model
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	100	100
Recurring | IRLC,net | Weighted Average | Pull through | Level 3 | Best execution model
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	88	86
Recurring | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	$ 8,325	$ 6,044
Recurring | Corporate bonds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	$ 2,113
Recurring | Corporate bonds | Discount rate | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range and weighted average of discount rate	7.00%
Recurring | Corporate bonds | Discount rate | Level 3 | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	$ 2,113
Recurring | Corporate bonds | Weighted Average | Discount rate | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range and weighted average of discount rate	7.00%
Recurring | Forward Commitment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets, Fair Value	$ (74)	(2,623)
Recurring | Forward Commitment | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets, Fair Value	(9)	(89)
Recurring | Forward Commitment | Market Differential
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets, Fair Value		$ (89)
Recurring | Forward Commitment | Market Differential | Level 3 | Internal Pricing Model
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets, Fair Value	$ (9)
Recurring | Forward Commitment | Minimum | Market Differential | Level 3 | Internal Pricing Model
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	(14)	(59)
Recurring | Forward Commitment | Maximum | Market Differential | Level 3 | Internal Pricing Model
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	(2)	(17)
Recurring | Forward Commitment | Weighted Average | Market Differential | Level 3 | Internal Pricing Model
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	(6)	(31)