Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

The following table summarizes changes in goodwill during the nine months ended September 30, 2017.

	Goodwill
Balance at December 31, 2016	$	46,867
Addition from merger with Clayton Banks (see Note 2)		92,043
Balance at September 30, 2017	$	138,910

Schedule of Change in Balance for Core Deposit Intangibles

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 is written down to its implied fair value. Subsequent increases in goodwill values are not recognized in the financial statements. Goodwill impairment was neither indicated nor recorded during the nine months ended September 30, 2017 or the year ended December 31, 2016.

The change in balance for core deposit intangibles during the year is as follows:

	Core deposit intangible
	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2017			2016			2017			2016
Beginning Balance	$	4,048		$	5,616		$	4,563		$	6,695
Addition from merger with Clayton Banks (see Note 2)		9,060			—			9,060			—
Less: amortization expense		(558	)		(526	)		(1,073	)		(1,605	)
Ending Balance	$	12,550		$	5,090		$	12,550		$	5,090

Schedule of Estimated Aggregate Amortization

On July 31, 2017, the Company recorded $9,060 of core deposit intangibles resulting from the merger with the Clayton Banks, which is being amortized over a weighted average life of approximately 3 years. The estimated aggregate amortization expense of core deposit intangibles for each of the next five years and thereafter is as follows:

Remainder of 2017	$	754
December 31, 2018		2,780
December 31, 2019		2,394
December 31, 2020		2,008
December 31, 2021		1,622
Thereafter		2,992
	$	12,550