Defined Benefit Pension Plans (Tables)

3 Months Ended

Mar. 31, 2015

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

Components of Net Periodic Benefit Cost

The composition of net periodic benefit cost was as follows:

(Dollars in thousands)	Qualified Pension Plan						Non-Qualified Retirement Plans
Three months ended March 31,	2015			2014			2015		2014
Net Periodic Benefit Cost:
Service cost		$615			$538			$20		$12
Interest cost	732			723			122		120
Expected return on plan assets	(1,129		)	(1,016		)	—		—
Amortization of prior service (credit) cost	(6		)	(6		)	—		—
Recognized net actuarial loss	312			115			61		16
Net periodic benefit cost		$524			$354			$203		$148