Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Changes in Carrying Amount of Goodwill

Changes in the carrying amount of the Corporation's goodwill by business segment for the years ended December 31, 2017 and 2016 were as follows:

(Dollars in thousands)	Banking		Wealth Management		Insurance		Consolidated
Balance at December 31, 2015	$	78,574	$	15,434	$	18,649	$	112,657
Addition to goodwill from acquisitions	59,902		—		—		59,902
Balance at December 31, 2016	138,476		15,434		18,649		172,559
Addition to goodwill from acquisitions	—		—		—		—
Balance at December 31, 2017	$	138,476	$	15,434	$	18,649	$	172,559

Components of Intangible Assets

The following table reflects the components of intangible assets at the dates indicated:

	At December 31, 2017						At December 31, 2016
(Dollars in thousands)	Gross Carrying Amount		Accumulated Amortization and Fair Value Adjustments		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization and Fair Value Adjustments		Net Carrying Amount
Amortized intangible assets:
Covenants not to compete	$	710	$	580	$	130	$	710	$	205	$	505
Core deposit intangibles	6,788		2,135		4,653		6,788		1,004		5,784
Customer related intangibles	12,381		9,828		2,553		12,381		8,504		3,877
Servicing rights	15,855		9,282		6,573		14,369		7,884		6,485
Total amortized intangible assets	$	35,734	$	21,825	$	13,909	$	34,248	$	17,597	$	16,651

Estimated Aggregate Amortization Expense

The estimated aggregate amortization expense for covenants not to compete and core deposit and customer related intangibles for each of the five succeeding fiscal years and thereafter follows:

Year	(Dollars in thousands)	Amount
2018		$	2,114
2019		1,565
2020		1,200
2021		923
2022		666
Thereafter		868

The estimated amortization expense of servicing rights for each of the five succeeding fiscal years and thereafter is as follows:

Year	(Dollars in thousands)	Amount
2018		$	970
2019		841
2020		729
2021		628
2022		541
Thereafter		2,864

Changes in Mortgage Servicing Rights

Changes in the servicing rights balance are summarized as follows:

	For the Years Ended December 31,
(Dollars in thousands)	2017			2016			2015
Beginning of period	$	6,485		$	5,877		$	5,509
Servicing rights capitalized	1,487			2,049			1,674
Acquired servicing rights	—			87			—
Amortization of servicing rights	(1,399		)	(1,528		)	(1,306		)
Changes in valuation allowance	—			—			—
End of period	$	6,573		$	6,485		$	5,877
Residential mortgage and SBA loans serviced for others	$	1,008,123		$	965,729		$	863,947

Activity in Valuation Allowance for Mortgage Servicing Rights

ctivity in the valuation allowance for the years ended December 31, 2017, 2016 and 2015.