The Company recorded $7.4 million of goodwill as a result of its acquisition of TPB in 2018. Goodwill impairment was neither indicated nor recorded during the three months ended March 31, 2020 or the year ended December 31, 2019.

Goodwill is tested annually, or more often if circumstances warrant, for impairment. If the implied fair value of goodwill is lower than its carrying amount, goodwill impairment is indicated, and goodwill is written down to its implied fair value. Subsequent increases in goodwill value are not recognized in the consolidated financial statements. Goodwill totaled $7.4 million as of both March 31, 2020 and December 31, 2019.

Core deposit premiums are amortized over a seven-year period and are periodically evaluated, at least annually, as to the recoverability of their carrying value. Core deposit premiums of $2.0 million were recorded during 2018 as part of the TPB acquisition.

The Company’s goodwill and other intangibles (carrying basis and accumulated amortization) as of March 31, 2020 were as follows:

	March 31, 2020
	(Dollars in Thousands)
Goodwill	$	7,435
Core deposit intangible:
Gross carrying amount		2,048
Accumulated amortization		(768	)
Core deposit intangible, net		1,280
Total	$	8,715

The Company’s estimated remaining amortization expense on intangibles as of March 31, 2020 was as follows:

	Amortization Expense
	(Dollars in Thousands)
2020	$	305
2021		341
2022		268
2023		195
2024		122
2025		49
Total	$	1,280

The net carrying amount of the Company’s core deposit premiums is not considered recoverable if it exceeds the sum of the undiscounted cash flows expected to result from the use and eventual disposition. That assessment is based on the carrying amount of the intangible assets subject to amortization at the date on which it is tested for recoverability. Intangible assets subject to amortization are tested by the Company for recoverability whenever events or changes in circumstances indicate that its carrying amount may not be recoverable.