Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill and Intangible Assets

The following table sets forth activity for goodwill and other intangible assets for the periods indicated:

	Three Months Ended June 30,						Six Months Ended June 30,
	2020			2019			2020			2019
	(in thousands)
Goodwill
Total goodwill	$	765,842		$	765,842		$	765,842		$	765,842
Other intangible assets, net
CDI:
Gross CDI balance at beginning of period	105,473			105,473			105,473			105,473
Accumulated amortization at beginning of period	(73,244		)	(63,203		)	(70,934		)	(60,455		)
CDI, net at beginning of period	32,229			42,270			34,539			45,018
CDI current period amortization	(2,210		)	(2,649		)	(4,520		)	(5,397		)
Total CDI, net at end of period	30,019			39,621			30,019			39,621
Intangible assets not subject to amortization	919			919			919			919
Other intangible assets, net at end of period	30,938			40,540			30,938			40,540
Total goodwill and other intangible assets at end of period	$	796,780		$	806,382		$	796,780		$	806,382

Estimated Future Amortization Expense of Core Deposit Intangibles

The following table provides the estimated future amortization expense of our CDI for the remaining six months ending December 31, 2020 and the succeeding four years:

	Year ending December 31,
	(in thousands)
2020	$	4,204
2021	7,264
2022	5,880
2023	4,552
2024	3,432