Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Changes in Goodwill

The following table summarizes changes in goodwill during the year ended December 31, 2017.

	Goodwill
Balance at December 31, 2016	$	46,867
Addition from merger with Clayton Banks (see Note 2)		90,323
Balance at December 31, 2017	$	137,190

Schedule of Core Deposit and Other Intangibles

Core deposit and other intangibles are as follows as of the indicated dates:

	Core deposit and other intangibles
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
December 31, 2017
Core deposit intangible	$	38,915	$	(27,121	)	$	11,794
Leasehold intangible		587		(38	)		549
Customer base trust intangible		1,600		(67	)		1,533
Manufactured housing servicing intangible		1,088		(62	)		1,026
Total core deposit and other intangibles	$	42,190	$	(27,288	)	$	14,902
December 31, 2016
Core deposit intangible	$	29,855	$	(25,292	)	$	4,563
December 31, 2015
Core deposit intangible	$	29,855	$	(23,160	)	$	6,695

Schedule of Estimated Aggregate Amortization Expense of Core Deposit and Other Intangibles

The estimated aggregate amortization expense of core deposit and other intangibles for each of the next five years and thereafter is as follows:

December 31, 2018	$	3,275
December 31, 2019		2,866
December 31, 2020		2,476
December 31, 2021		2,090
December 31, 2022		1,609
Thereafter		2,586
	$	14,902