Quarterly report pursuant to Section 13 or 15(d)

Employee Benefit 401(k) Plans (Details)

v2.4.0.6
Employee Benefit 401(k) Plans (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Employee Benefit 401(k) Plans [Abstract]    
Minimum employee subscription rate, percentage of compensation 1.00%  
Maximum employee subscription rate, percentage of compensation 60.00%  
Employee pre-tax contributions vested percentage 100.00%  
Profit sharing contributions period before partial vesting (in years) two  
Vesting rate 20.00%  
Percentage vested after total service period 100.00%  
Period of service before being fully vested six  
Employee's vesting rights Participants are always 100 percent vested in their pre-tax contributions and will begin vesting in any matching or profit sharing contributions made on their behalf after two years of service with the Company at a rate of 20 percent per year, becoming 100 percent vested after a total of six years of service with the Company.  
Expenses for employee benefit plan $ 0 $ 0
Employer contribution to employee benefit plan $ 0 $ 0