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BUSINESS COMBINATIONS - Covenant Financial (Details) - USD ($)	Jul. 01, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
BUSINESS COMBINATIONS
Goodwill		$ 52,526,000	$ 28,388,000	$ 28,388,000	$ 28,618,000	$ 28,618,000	$ 11,942,000
Covenant Financial Inc.
BUSINESS COMBINATIONS
Total purchase consideration	$ 63,266,000
Cash paid	$ 21,654,000
Shares of common stock issued	2,047,819
Value of common stock issued	$ 41,612,000
Stock issuance cost	183,000
Fair value of assets acquired	608,631,000
Fair value of liabilities assumed	569,503,000
Goodwill	$ 24,138,000
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