Employee Benefit Plans (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Noncurrent Liability	$ 21,335	$ 54,768
Pension Benefit Plan
Current Liability	(330)	(345)
Noncurrent Liability	(9,268)	(24,568)
Net Liability Recognized	(9,598)	(24,913)
Other Benefits Plan
Current Liability
Noncurrent Liability	(12,067)	(30,200)
Net Liability Recognized	$ (12,067)	$ (30,200)