SUMMARY OF SIGNIFICANT ACCOUNTING AND REPORTING POLICIES - Reclassifications (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle
Equity balance		$ 804,580	$ 731,291	$ 875,297	$ 754,140
Impact of CECL adoption
New Accounting Pronouncements or Change in Accounting Principle
Equity balance		$ (7,830)	$ (16,452)		0
Impact of CECL adoption - purchased loans with credit deterioration	$ 231
Accounting Standards Update 2017-08
New Accounting Pronouncements or Change in Accounting Principle
Accounting Standards Update [Extensible List]			us-gaap:AccountingStandardsUpdate201708Member
Accounting Standards Update 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member
Impact of CECL adoption - purchased loans with credit deterioration	$ 231
Retained  Earnings
New Accounting Pronouncements or Change in Accounting Principle
Equity balance		$ 80,274	$ 64,797	$ 111,208	32,851
Retained  Earnings | Impact of CECL adoption
New Accounting Pronouncements or Change in Accounting Principle
Equity balance		$ (7,830)	$ (16,452)		$ (85)