Employee Benefit Plans (Tables) (Defined Benefit Pension)

6 Months Ended

Jun. 30, 2013

Defined Benefit Pension

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs

For the three-month and six-month periods ended June 30, 2013, and 2012 the components of pension expense are as follows:

	Three months ended June 30						Six months ended June 30
	2013			2012			2013			2012
	(dollars in thousands)
Service cost	$	4,261		$	3,548		$	8,483		$	6,375
Interest cost	6,409			5,646			12,304			10,142
Expected return on assets	(7,474		)	(6,755		)	(14,405		)	(12,134		)
Amortization of prior service cost	53			53			105			106
Amortization of net actuarial loss	4,241			2,737			8,493			5,474
Total pension expense	$	7,490		$	5,229		$	14,980		$	9,963