GOODWILL (Tables)

6 Months Ended

Jun. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

Changes in the carrying amount of goodwill for the three and six months ended June 30, 2021 and June 30, 2020 were as follows:

	Three months ended				Six months ended
	June 30,				June 30,
(Dollars in thousands)	2021		2020		2021		2020
Balance at beginning of period	$	937,771	$	937,771	$	937,771	$	937,771
Goodwill resulting from business combinations	0		0		0		0
Balance at end of period	$	937,771	$	937,771	$	937,771	$	937,771

Finite-Lived Intangible Assets [Line Items]

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

(Dollars in thousands)	June 30, 2021				December 31, 2020
	Gross carrying amount		Accumulated amortization		Gross carrying amount		Accumulated amortization
Amortized intangible assets
Core deposit intangibles	$	51,031	$	(30,144)	$	51,031	$	(27,524)
Customer list	39,420		(6,570)		39,420		(4,778)
Other	10,146		(4,492)		10,113		(3,710)
Total	$	100,597	$	(41,206)	$	100,564	$	(36,012)