FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2023

Fair Value Disclosures [Abstract]

Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis

The following table presents the balances of financial assets and liabilities measured at fair value on a recurring basis as of December 31, (dollars in thousands):

	2023 Fair Value Measurements using
			Significant
	Quoted Prices in		Other		Significant
	Active Markets for		Observable		Unobservable
	Identical Assets		Inputs		Inputs
	Level 1		Level 2		Level 3		Balance
ASSETS
AFS securities:
U.S. government and agency securities	$	61,311	$	2,045	$	—	$	63,356
Obligations of states and political subdivisions		—		475,447		—		475,447
Corporate and other bonds(1)		—		241,889		—		241,889
MBS		—		1,448,817		—		1,448,817
Other securities		—		1,752		—		1,752
LHFS		—		6,710		—		6,710
Financial Derivatives(2)		—		93,027		—		93,027
LIABILITIES
Financial Derivatives(2)	$	—	$	206,561	$	—	$	206,561

⁽¹⁾ Other bonds include asset-backed securities.

⁽²⁾ Includes hedged and non-hedged derivatives.

	2022 Fair Value Measurements using
			Significant
	Quoted Prices in		Other		Significant
	Active Markets for		Observable		Unobservable
	Identical Assets		Inputs		Inputs
	Level 1		Level 2		Level 3		Balance
ASSETS
AFS securities:
U.S. government and agency securities	$	56,606	$	5,337	$	—	$	61,943
Obligations of states and political subdivisions		—		807,435		—		807,435
Corporate and other bonds(1)		—		226,380		—		226,380
MBS		—		1,644,394		—		1,644,394
Other securities		—		1,664		—		1,664
LHFS		—		3,936		—		3,936
Financial Derivatives(2)		—		80,310		—		80,310
LIABILITIES
Financial Derivatives(2)	$	—	$	236,000	$	—	$	236,000

⁽¹⁾ Other bonds include asset-backed securities.

⁽²⁾ Includes hedged and non-hedged derivatives.

Carrying Values and Estimated Fair Values of the Company's Financial Instruments

The carrying values and estimated fair values of the Company’s financial instruments as of December 31, are as follows (dollars in thousands):

	2023 Fair Value Measurements using
			Quoted Prices		Significant
			in Active		Other		Significant
			Markets for		Observable		Unobservable		Total Fair
			Identical Assets		Inputs		Inputs		Value
	Carrying
	Value		Level 1		Level 2		Level 3		Balance
ASSETS
Cash and cash equivalents	$	378,131	$	378,131	$	—	$	—	$	378,131
AFS securities		2,231,261		61,311		2,169,950		—		2,231,261
HTM securities		837,378		—		806,834		1,240		808,074
Restricted stock		115,472		—		115,472		—		115,472
LHFS		6,710		—		6,710		—		6,710
LHFI, net of deferred fees and costs		15,635,043		—		—		15,148,256		15,148,256
Financial Derivatives(1)		93,027		—		93,027		—		93,027
Accrued interest receivable		91,370		—		91,370		—		91,370
BOLI		452,565		—		452,565		—		452,565
LIABILITIES
Deposits	$	16,818,129	$	—	$	16,799,791	$	—	$	16,799,791
Borrowings		1,311,858		—		1,154,694		—		1,154,694
Accrued interest payable		20,528		—		20,528		—		20,528
Financial Derivatives(1)		206,561		—		206,561		—		206,561

⁽¹⁾ Includes hedged and non-hedged derivatives.

	2022 Fair Value Measurements using
			Quoted Prices		Significant
			in Active		Other		Significant
			Markets for		Observable		Unobservable		Total Fair
			Identical Assets		Inputs		Inputs		Value
	Carrying
	Value		Level 1		Level 2		Level 3		Balance
ASSETS
Cash and cash equivalents	$	319,948	$	319,948	$	—	$	—	$	319,948
AFS securities		2,741,816		56,606		2,685,210		—		2,741,816
HTM securities		847,732		—		798,778		3,109		801,887
Restricted stock		120,213		—		120,213		—		120,213
LHFS		3,936		—		3,936		—		3,936
LHFI, net of deferred fees and costs		14,449,142		—		—		13,974,926		13,974,926
Financial Derivatives(1)		80,310		—		80,310		—		80,310
Accrued interest receivable		81,953		—		81,953		—		81,953
BOLI		440,656		—		440,656		—		440,656
LIABILITIES
Deposits	$	15,931,677	$	—	$	15,927,361	$	—	$	15,927,361
Borrowings		1,708,700		—		1,645,095		—		1,645,095
Accrued interest payable		5,268		—		5,268		—		5,268
Financial Derivatives(1)		236,000		—		236,000		—		236,000

⁽¹⁾ Includes hedged and non-hedged derivatives.