Employee Benefit Plans - Summary of amounts recognized in consolidated balance sheets consist of (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Long-term pension liability	$ (21,966)	$ (26,543)
Retirement Income Plan
Defined Benefit Plan Disclosure [Line Items]
Funded status	(5,102)	(13,180)
SERP liability	(16,864)	(13,363)
Long-term pension liability	$ (21,966)	$ (26,543)