Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying amount of goodwill

Changes in the carrying amount of goodwill during the years ended December 31, 2016 and 2015 were as follows:

	Community Banks			Insurance		Total
Balance at December 31, 2014	$	271,939		$	2,767	$	274,706
Addition to goodwill from Heritage acquisition	171,182			—		171,182
Adjustment to previously recorded goodwill	(17		)	—		(17		)
Balance at December 31, 2015	$	443,104		$	2,767	$	445,871
Addition to goodwill from KeyWorth acquisition	20,633			—		20,633
Adjustment to previously recorded goodwill	4,030			—		4,030
Balance at December 31, 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
December 31, 2016
Core deposit intangible	$	47,992	$	(25,188	)	$	22,804
Customer relationship intangible	1,970		(700		)	1,270
Total finite-lived intangible assets	$	49,962	$	(25,888	)	$	24,074
December 31, 2015
Core deposit intangible	$	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

Estimated amortization expense of finite-lived intangible assets for future periods

The estimated amortization expense of finite-lived intangible assets for the five succeeding fiscal years is summarized as follows:

	Core Deposit Intangibles		Customer Relationship Intangible		Total
2017	$	5,723	$	131	$	5,854
2018	4,881		131		5,012
2019	4,101		131		4,232
2020	3,213		131		3,344
2021	2,273		131		2,404