Quarterly report pursuant to Section 13 or 15(d)

Benefit Plans (Details Textuals)

v2.4.0.6
Benefit Plans (Details Textuals) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Y
Dec. 31, 2012
Benefit Plans (Textuals) [Abstract]    
Employees retirement age for health care and life insurance benefits under unfunded defined benefit post-retirement plan 55  
Employees vesting service under defined benefit post-retirement plan, minimum 10 Years  
Life insurance coverage, maximum $ 50  
Average duration of plan assets investment in bonds, years 12 years  
Base pay contributed to the plan up to first 4%  
Fair value of plan assets, Percentage 100.00% 100.00%
Equity Securities [Member]
   
Benefit Plans (Textuals) [Abstract]    
Defined Benefit Plan, Actual Plan Asset Allocations 58.00%  
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum 20.00%  
Defined Benefit Plan, Target Plan Assets Allocation Range Maximum 80.00%  
Covered Bonds [Member]
   
Benefit Plans (Textuals) [Abstract]    
Defined Benefit Plan, Actual Plan Asset Allocations 42.00%  
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum 50.00%  
Defined Benefit Plan, Target Plan Assets Allocation Range Maximum 50.00%  
Cash and Cash Equivalents [Member]
   
Benefit Plans (Textuals) [Abstract]    
Defined Benefit Plan, Actual Plan Asset Allocations 1.00%