Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Net carrying value of other intangible assets

The following table shows the net carrying value of the Corporation's other intangible assets.

	December 31,
(Dollars in thousands)	2018		2017
Core deposit intangible assets	$	28,556	$	34,259
Non-compete intangible assets	—		12
Total other intangible assets	$	28,556	$	34,271

Carrying amount, accumulated amortization and amortization expense of core deposit intangible assets

The following table sets forth the carrying amount and accumulated amortization of core deposit intangible assets that are amortizable and arose from business combinations or other acquisitions:

	December 31,
(Dollars in thousands)	2018		2017
Gross original amount	$	56,456	$	59,143
Accumulated amortization	27,900		24,884
Net carrying amount	$	28,556	$	34,259

Estimated future amortization expense on CDIs

The estimated future amortization expense on core deposit intangible assets for the next five years is as follows:

(Dollars in thousands)	Estimated amortization expense
2019	$	5,441
2020	4,851
2021	4,471
2022	4,218
2023	3,591