Goodwill (Tables)

6 Months Ended

Jun. 30, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Carrying value of goodwill and the accumulated impairment charge

(Dollars in thousands)	June 30, 2013			December 31, 2012
Gross carrying value	$	159,668		146,259
Accumulated impairment charge	(40,159		)	(40,159	)
Net carrying value	$	119,509		106,100

	Three Months ended			Six Months ended
(Dollars in thousands)	June 30, 2013		June 30, 2012	June 30, 2013	June 30, 2012
Net carrying value at beginning of period	$	106,100	106,100	106,100	106,100
Acquisitions	13,409		—	13,409	—
Net carrying value at end of period	$	119,509	106,100	119,509	106,100