Other Intangible Assets and Goodwill (Tables)

12 Months Ended

Dec. 31, 2015

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



	At or for the Years ended
(Dollars in thousands)	December 31, 2015			December 31, 2014		December 31, 2013
Gross carrying value	$	38,527		32,056		27,857
Accumulated amortization	(23,972		)	(21,156	)	(18,345	)
Net carrying value	$	14,555		10,900		9,512
Aggregate amortization expense	$	2,964		2,811		2,401
Weighted-average amortization period	9.7 years
Estimated amortization expense for the years ending December 31,
2016	$	2,923
2017	2,027
2018	1,598
2019	1,512
2020	1,465

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



	Years ended
(Dollars in thousands)	December 31, 2015		December 31, 2014	December 31, 2013
Net carrying value at beginning of period	$	129,706	129,706	106,100
Acquisitions	10,932		—	23,606
Net carrying value at end of period	$	140,638	129,706	129,706

The gross carrying value of goodwill and the accumulated impairment charge consists of the following:



(Dollars in thousands)	December 31, 2015			December 31, 2014
Gross carrying value	$	180,797		169,865
Accumulated impairment charge ¹	(40,159		)	(40,159	)
Net carrying value	$	140,638		129,706

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¹A goodwill impairment charge was recognized in 2011 and was due to high levels of volatility and dislocation in bank stock prices nationwide.