Pension and Other Post Retirement Benefit Plans - Schedule of Plan Assets by Level (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 69,871	$ 62,865	$ 62,078
Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	69,871
Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	51,176
Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	18,695
Cash and cash equivalents | Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,864
Cash and cash equivalents | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,864
Corporate Bonds and Notes | Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	6,076
Corporate Bonds and Notes | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	6,076
Government Agency and Municipal Bonds and Notes | Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	8,263
Government Agency and Municipal Bonds and Notes | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	8,263
Certificates of Deposit | Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	607
Certificates of Deposit | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	607
Common Stock | Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,375
Common Stock | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,375
Common Bond Fund | Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	5,318
Common Bond Fund | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	5,318
Common Equity Fund | Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	4,507
Common Equity Fund | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	4,507
Taxable Bond | Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	3,901
Taxable Bond | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	3,901
Large Cap Equity | Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	20,617
Large Cap Equity | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	20,617
Mid Cap Equity | Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	8,721
Mid Cap Equity | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	8,721
Small Cap Equity | Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	3,584
Small Cap Equity | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	3,584
International Equity | Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	3,727
International Equity | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	3,727
Specialty Alternative Equity | Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,311
Specialty Alternative Equity | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 1,311