Summary of Significant Accounting Policies - Schedule of Net Benefit Cost (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Postemployment Benefits [Abstract]
Amortization of actuarial losses - Gross	$ 201	$ 277
Amortization of actuarial losses - Tax	(51)	(72)
Amortization of actuarial losses - Net	$ 150	$ 205

Amount before tax of reclassification adjustment from accumulated other comprehensive (income) loss related to net period benefit cost (credit) for pension and other postretirement defined benefit plans.

No definition available.

Name:	us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration