Other Intangible Assets and Goodwill (Tables)

12 Months Ended

Dec. 31, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Core deposit intangibles

	At or for the Years ended
(Dollars in thousands)	December 31, 2013			December 31, 2012		December 31, 2011
Gross carrying value	$	27,857		22,404		28,248
Accumulated amortization	(18,345		)	(16,230	)	(19,964	)
Net carrying value	$	9,512		6,174		8,284
Aggregate amortization expense	$	2,401		2,110		2,473
Weighted-average amortization period
(Period in years)	9.5
Estimated amortization expense for the years ending December 31,
2014	$	2,650
2015	2,198
2016	1,700
2017	828
2018	430

Changes in the carrying value of goodwill

	Years ended
(Dollars in thousands)	December 31, 2013		December 31, 2012	December 31, 2011
Net carrying value at beginning of period	$	106,100	106,100	146,259
Acquisitions	23,606		—	—
Impairment charge	—		—	(40,159	)
Net carrying value at end of period	$	129,706	106,100	106,100

Gross carrying value of goodwill and the accumulated impairment charge

(Dollars in thousands)	December 31, 2013			December 31, 2012
Gross carrying value	$	169,865		146,259
Accumulated impairment charge	(40,159		)	(40,159	)
Net carrying value	$	129,706		106,100