GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Change in the Carrying Value of Goodwill

The change in the carrying value of goodwill for the years ended December 31, 2019 and 2018 is summarized below for both the total Company and by the Company's reportable segments.

	December 31,
(dollars in thousands)	2019		2018
Consolidated
Carrying amount of goodwill at beginning of year	$	503,434	$	125,532
Additions related to acquisitions in current year	430,497		377,902
Fair value adjustments related to acquisitions in prior year	(2,294)		—
Carrying amount of goodwill at end of year	$	931,637	$	503,434
Banking Division
Carrying amount of goodwill at beginning of year	$	438,144	$	125,532
Additions related to acquisitions in current year	430,497		312,612
Fair value adjustments related to acquisitions in prior year	(1,502)		—
Carrying amount of goodwill at end of year	$	867,139	$	438,144
Premium Finance Division
Carrying amount of goodwill at beginning of year	$	65,290	$	—
Additions related to acquisitions in current year	—		65,290
Fair value adjustments related to acquisitions in prior year	(792)		—
Carrying amount of goodwill at end of year	$	64,498	$	65,290

Summary of Information Related to Acquired Intangible Assets

The following is a summary of information related to acquired intangible assets:

	As of December 31, 2019				As of December 31, 2018
(dollars in thousands)	Gross Amount		Accumulated Amortization		Gross Amount		Accumulated Amortization
Amortized intangible assets:
Core deposit premiums	$	107,958	$	34,220	$	57,348	$	19,512
Insurance agent relationships	22,351		5,355		22,351		2,561
US Premium Finance trade name	1,094		300		1,094		143
Non-compete agreement	162		104		162		50
	$	131,565	$	39,979	$	80,955	$	22,266

Estimated Amortization Expense

The estimated amortization expense for each of the next five years is as follows (in thousands):

2020	$	19,612
2021	14,965
2022	12,554
2023	11,054
2024	9,999
Thereafter	23,402
	$	91,586