Defined Benefit Pension Plans Schedule of Net Periodic Benefit Cost Not yet Recognized (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 13,262	$ 20,676
Net prior service cost	1,133	1,063
Amount included in accumulated other comprehensive income	$ 14,395	$ 21,739