Employee Benefit Plans - Changes Recognized in OCI (Details) (Defined Benefit Plans, USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial gain/(loss)	$ 52,063	$ (30,761)	$ (29,350)
Amortization of actuarial (gain)/loss	4,192	4,246	2,982
Amortization of prior service cost	0	4	4
Total	$ 56,255	$ (26,511)	$ (26,364)

Before tax amount of the income statement impact of the reclassification adjustment for prior service costs recognized as a component of net period benefit cost.

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