LOANS AND ALLOWANCE - Changes in Allowance for Loan Losses by Loan Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 226,275	$ 199,775	$ 195,397	$ 130,648
Provision for credit losses	0	0	0	0
CECL Day 1 non-PCD provision for credit losses			13,955
CECL Day 1 PCD ACL			16,599
Recoveries on loans	1,315	835	3,536	1,941
Loans charged off	(888)	(638)	(2,785)	(6,672)
Ending balance	226,702	199,972	226,702	199,972
Impact of adopting ASC 326
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				74,055
Adjusted balance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				204,703
Previously reported
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				130,648
Credit risk reclassifications
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				0
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	94,228	63,681	69,935	47,115
Provision for credit losses	10,142	3,496	18,518	666
CECL Day 1 non-PCD provision for credit losses			2,957
CECL Day 1 PCD ACL			12,970
Recoveries on loans	81	204	789	544
Loans charged off	(306)	(137)	(1,024)	(1,105)
Ending balance	104,145	67,244	104,145	67,244
Commercial | Impact of adopting ASC 326
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				20,024
Commercial | Adjusted balance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				67,139
Commercial | Previously reported
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				47,115
Commercial | Credit risk reclassifications
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				0
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	55,328	72,701	60,665	40,786
Provision for credit losses	(7,054)	(3,850)	(21,697)	(2,709)
CECL Day 1 non-PCD provision for credit losses			5,539
CECL Day 1 PCD ACL			2,981
Recoveries on loans	188	370	1,096	567
Loans charged off	(1)	(115)	(123)	(4,463)
Ending balance	48,461	69,106	48,461	69,106
Commercial Real Estate | Impact of adopting ASC 326
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				34,925
Commercial Real Estate | Adjusted balance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				75,711
Commercial Real Estate | Previously reported
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				51,070
Commercial Real Estate | Credit risk reclassifications
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				(10,284)
Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	27,401	17,077	20,206	10,284
Provision for credit losses	186	567	5,862	(1,444)
CECL Day 1 non-PCD provision for credit losses			871
CECL Day 1 PCD ACL			648
Recoveries on loans	824	0	824	1
Loans charged off	0	(4)	0	(6)
Ending balance	28,411	17,640	28,411	17,640
Construction | Impact of adopting ASC 326
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				8,805
Construction | Adjusted balance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				19,089
Construction | Previously reported
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				0
Construction | Credit risk reclassifications
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				10,284
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				0
Provision for credit losses				0
Recoveries on loans				0
Loans charged off				0
Ending balance		0		0
Consumer | Impact of adopting ASC 326
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				0
Consumer | Adjusted balance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				0
Consumer | Previously reported
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				9,648
Consumer | Credit risk reclassifications
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				(9,648)
Residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				0
Provision for credit losses				0
Recoveries on loans				0
Loans charged off				0
Ending balance		0		0
Residential | Impact of adopting ASC 326
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				0
Residential | Adjusted balance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				0
Residential | Previously reported
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				22,815
Residential | Credit risk reclassifications
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				(22,815)
Consumer & Residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	49,318	46,316	44,591	32,463
Provision for credit losses	(3,274)	(213)	(2,683)	3,487
CECL Day 1 non-PCD provision for credit losses			4,588
CECL Day 1 PCD ACL			0
Recoveries on loans	222	261	827	829
Loans charged off	(581)	(382)	(1,638)	(1,098)
Ending balance	$ 45,685	$ 45,982	$ 45,685	45,982
Consumer & Residential | Impact of adopting ASC 326
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				10,301
Consumer & Residential | Adjusted balance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				42,764
Consumer & Residential | Previously reported
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				0
Consumer & Residential | Credit risk reclassifications
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				$ 32,463