Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Other Intangible Assets [Abstract]

Schedule of Goodwill [Table Text Block]

The following table details changes in the recorded amount of goodwill for the years ended December 31:

(Dollars in thousands)	2017		2016
Goodwill, beginning of year	$	132,631	$	132,631
Acquired goodwill	480		—
Goodwill, end of year	$	133,111	$	132,631

Schedule of Other Intangible Assets

Other intangible assets were comprised of the following at December 31:

(Dollars in thousands)	Core Deposits			Customer Relationships			Total
2017
Gross intangibles	$	16,150		$	5,373		$	21,523
Acquired intangibles	—			1,593			1,593
Accumulated amortization	(10,281		)	(3,675		)	(13,956		)
Total acquired intangibles	$	5,869		$	3,291		$	9,160
Servicing rights							2,305
Total other intangibles							$	11,465
2016
Gross intangibles	$	16,150		$	4,859		$	21,009
Acquired intangibles	—			514			514
Accumulated amortization	(7,594		)	(2,847		)	(10,441		)
Total acquired intangibles	$	8,556		$	2,526		$	11,082
Servicing rights							2,305
Total other intangibles							$	13,387

Schedule of Future Amortization of Other Intangible Assets

The following table details estimated aggregate future amortization expense of core deposit and customer relationship intangible assets at December 31, 2017:

(Dollars in thousands)	Core Deposits		Customer Relationships		Total
2018	$	2,175	$	839	$	3,014
2019	1,658		706		2,364
2020	1,138		563		1,701
2021	648		413		1,061
2022	208		274		482
Thereafter	42		496		538
Total	$	5,869	$	3,291	$	9,160

Servicing Rights Activity

The following is an analysis of activity of servicing rights for the years ended December 31:

(Dollars in thousands)	2017			2016			2015
Balance, beginning of year	$	2,305		$	2,387		$	2,238
Amortization	(741		)	(762		)	(662		)
Servicing rights originated	741			680			566
Servicing rights acquired	—			—			245
Balance, end of year	$	2,305		$	2,305		$	2,387