Defined Benefit Pension Plans (Tables)

9 Months Ended

Sep. 30, 2012

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Components of Net Periodic Benefit Cost

For the periods indicated, the composition of net periodic benefit cost was as follows:

(Dollars in thousands)	Qualified Pension Plan												Non-Qualified Retirement Plans
	Three Months						Nine Months						Three Months						Nine Months
Periods ended September 30,	2012			2011			2012			2011			2012			2011			2012			2011
Service cost		$644			$579			$1,931			$1,736			$38			$18			$113			$54
Interest cost	705			645			2,117			1,934			126			124			378			372
Expected return on plan assets	(746		)	(699		)	(2,239		)	(2,096		)	—			—			—			—
Amortization of prior service cost	(8		)	(8		)	(25		)	(25		)	(1		)	(1		)	(1		)	(1		)
Recognized net actuarial loss	246			98			737			294			29			5			88			11
Net periodic benefit cost		$841			$615			$2,521			$1,843			$192			$146			$578			$436