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GOODWILL (Tables)

3 Months Ended

Mar. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

Changes in the carrying amount of goodwill for the three months ended March 31, 2023 and March 31, 2022 were as follows:

												Three months ended
												March 31,
(Dollars in thousands)																		2023						2022
Balance at beginning of period																		$	1,001,507					$	1,000,749
Goodwill resulting from business combinations																		4,231						(790)
Balance at end of period																		$	1,005,738					$	999,959

Finite-Lived Intangible Assets [Line Items]

Schedule of Finite-Lived Intangible Assets [Table Text Block]

(Dollars in thousands)						March 31, 2023												December 31, 2022
						Gross carrying amount						Accumulated amortization						Gross carrying amount						Accumulated amortization
Core deposit intangibles						$	41,750					$	(27,215)					$	41,750					$	(26,488)
Customer list						69,563						(15,981)						69,563						(14,457)
Other						10,960						(4,253)						14,079						(7,064)
Mortgage servicing rights						21,623						(5,278)						21,347						(4,811)
Total						$	143,896					$	(52,727)					$	146,739					$	(52,820)

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Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.

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Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

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