Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans (Details 4)

v2.4.0.6
Employee Benefit Plans (Details 4) (Supplemental Employee Retirement Plans, Defined Benefit [Member])
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Supplemental Employee Retirement Plans, Defined Benefit [Member]
   
Weighted average assumptions used to determine benefit obligation and net periodic benefit costs    
Discount rate 3.85% 4.40%
Rate of compensation increase 3.00% 3.00%