Employee Benefit Plans (Post-Retirement Benefit Expenses) (Details) (Post-Retirement Plan [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Post-Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Post-retirement benefit expenses	$ 3,801	$ 3,141	$ 2,258