Employee Benefit Plans - Summary of accumulated other comprehensive loss expected to be recognized as components of net periodic benefit cost(Details) (Forecast, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Forecast
Defined Benefit Plan Disclosure [Line Items]
Amortization of net loss	$ 789
Prior service cost (credit)
Net transition obligation (asset)
Estimated net periodic benefit plan cost	$ 789