Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 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:



	Years Ended December 31,
	2019			2018			2017
	(in thousands)
Goodwill, beginning of period	$	765,842		$	765,842		$	382,762
Established through acquisitions (1)	—			—			383,080
Total goodwill, end of period	765,842			765,842			765,842
Other intangible assets, net
CDI:
Gross CDI balance, beginning of period	105,473			105,473			58,598
Accumulated amortization, beginning of period	(60,455		)	(48,219		)	(41,886		)
CDI, net, beginning of period	45,018			57,254			16,712
Established through acquisitions (1)	—			—			46,875
CDI current period amortization	(10,479		)	(12,236		)	(6,333		)
Total CDI, end of period	34,539			45,018			57,254
Intangible assets not subject to amortization	919			919			919
Other intangible assets, net at end of period	35,458			45,937			58,173
Total goodwill and intangible assets, end of period	$	801,300		$	811,779		$	824,015

__________

(1) See Note 2, “Business Combinations,” for additional information regarding the goodwill and CDI related to the acquisition of Pacific Continental on November 1, 2017.

Estimated Future Amortization Expense of Core Deposit Intangibles

The following table provides the estimated future amortization expense of CDI for the succeeding five years:



	Years Ending December 31,
	(in thousands)
2020	$	8,724
2021	7,264
2022	5,880
2023	4,552
2024	3,432