Components of Net Periodic Benefit Cost (Details Textual) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Defined Benefits Plan Estimated Future Employer Contributions In Next Fiscal Year			$ 3,200,000
Expected contribution to ESOP			1,200,000
Defined Contribution Plan Employer Accrued Discretionary Contribution Amount	359,000	350,000
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions made by employer	616,000
Post-Retirement Health Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions made by employer	52,000
Expected contribution to ESOP			$ 248,000