Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2019

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 March 31,
	2019			2018
	(in thousands)
Goodwill
Total goodwill	$	765,842		$	765,842
Other intangible assets, net
CDI:
Gross CDI balance at beginning of period	105,473			105,473
Accumulated amortization at beginning of period	(60,455		)	(48,219		)
CDI, net at beginning of period	45,018			57,254
CDI current period amortization	(2,748		)	(3,188		)
Total CDI, net at end of period	42,270			54,066
Intangible assets not subject to amortization	919			919
Other intangible assets, net at end of period	43,189			54,985
Total goodwill and other intangible assets at end of period	$	809,031		$	820,827

Estimated Future Amortization Expense of Core Deposit Intangibles

The following table provides the estimated future amortization expense of our CDI for the remaining nine months ending December 31, 2019 and the succeeding four years:

	Year ending December 31,
	(in thousands)
2019	$	7,731
2020	8,724
2021	7,264
2022	5,880
2023	4,552