Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of changes in the carrying amount of goodwill

Changes in the carrying amount of goodwill during the six months ended June 30, 2016 were as follows:



	Community Banks		Insurance		Total
Balance at January 1, 2016	$	443,104	$	2,767	$	445,871
Addition to goodwill from KeyWorth acquisition	20,634		—		20,634
Adjustment to previously recorded goodwill	4,029		—		4,029
Balance at June 30, 2016	$	467,767	$	2,767	$	470,534

Summary of finite-lived intangible assets

The following table provides a summary of finite-lived intangible assets as of the dates presented:



	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
June 30, 2016
Core deposit intangibles	$	47,992	$	(21,944	)	$	26,048
Customer relationship intangible	1,970		(635		)	1,335
Total finite-lived intangible assets	$	49,962	$	(22,579	)	$	27,383
December 31, 2015
Core deposit intangibles	$	45,982	$	(18,572	)	$	27,410
Customer relationship intangible	1,970		(569		)	1,401
Total finite-lived intangible assets	$	47,952	$	(19,141	)	$	28,811

Schedule of current year amortization expense for finite-lived intangible assets

Current year amortization expense for finite-lived intangible assets is presented in the table below.



	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2016	2015	2016	2015
Amortization expense for:
Core deposit intangibles	1,709	1,206	3,373	2,447
Customer relationship intangible	33	33	66	66
Total intangible amortization	1,742	1,239	3,439	2,513

Schedule of estimated amortization expense of finite-lived intangible assets

The estimated amortization expense of finite-lived intangible assets for the year ending December 31, 2016 and the succeeding four years is summarized as follows:



	Core Deposit Intangibles		Customer Relationship Intangible		Total

2016	$	6,616	$	131	$	6,747
2017	5,722		131		$	5,853
2018	4,881		131		$	5,012
2019	4,101		131		$	4,232
2020	3,213		131		$	3,344