Other Intangible Assets and Goodwill (Tables)

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

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, 2014			December 31, 2013		December 31, 2012
Gross carrying value	$	32,056		27,857		22,404
Accumulated amortization	(21,156		)	(18,345	)	(16,230	)
Net carrying value	$	10,900		9,512		6,174
Aggregate amortization expense	$	2,811		2,401		2,110
Weighted-average amortization period
(Period in years)	9.6
Estimated amortization expense for the years ending December 31,
2015	$	2,676
2016	2,170
2017	1,287
2018	876
2019	810

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, 2014		December 31, 2013	December 31, 2012
Net carrying value at beginning of period	$	129,706	106,100	106,100
Acquisitions	—		23,606	—
Net carrying value at end of period	$	129,706	129,706	106,100

Gross carrying value of goodwill and the accumulated impairment charge

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

(Dollars in thousands)	December 31, 2014			December 31, 2013
Gross carrying value	$	169,865		169,865
Accumulated impairment charge	(40,159		)	(40,159	)
Net carrying value	$	129,706		129,706