Other Intangible Assets and Goodwill (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of core deposit intangibles

The following table sets forth information regarding the Company’s core deposit intangibles:

	At or for the Years ended
(Dollars in thousands)	December 31, 2017			December 31, 2016		December 31, 2015
Gross carrying value	$	21,649		21,943		38,527
Accumulated amortization	(7,465		)	(9,596	)	(23,972	)
Net carrying value	$	14,184		12,347		14,555
Aggregate amortization expense	$	2,494		2,970		2,964
Estimated amortization expense for the years ending December 31,
2018	$	2,209
2019	2,100
2020	2,027
2021	1,952
2022	1,871

Changes in the carrying value of goodwill

The following schedule discloses the changes in the carrying value of goodwill:

	Years ended
(Dollars in thousands)	December 31, 2017		December 31, 2016	December 31, 2015
Net carrying value at beginning of period	$	147,053	140,638	129,706
Acquisitions and adjustments	30,758		6,415	10,932
Net carrying value at end of period	$	177,811	147,053	140,638