Annual report pursuant to Section 13 and 15(d)

Retirement Plans (Details)

v2.4.0.6
Retirement Plans (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]  
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent 25.00%
Defined Contribution Plan, Employer Matching Contribution, Percent 100.00%
Defined Contribution Plan Employer Matching Contribution At Fifty Percent 50.00%
Pension and Other Postretirement Benefit Expense $ 0.8
Maximum [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
Defined Contribution Plan, Employer Matching Contribution, Percent 3.00%
Defined Contribution Plan Employer Matching Contribution At Fifty Percent 5.00%
Minimum [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
Defined Contribution Plan Employer Matching Contribution At Fifty Percent 3.00%