The following table reconciles on a historical basis for the second quarter year-to-date 2013 and second quarter year-to-date 2012, the Company’s Free cash flow on a consolidated basis to the line on its Condensed Consolidated Statements of Operations entitled Net income, which the Company believes is the most directly comparable GAAP measure on its Condensed Consolidated Statements of Operations. Free cash flow margin is defined as Free cash flow divided by Total revenue.
|Depreciation and amortization||3.3||2.4|
|Stock-based compensation expense||2.9||2.5|
|Maintenance capital expenditures||(2.5||)||(1.6||)|
|Free cash flow||$21.8||$18.2|
|Free cash flow margin||20.1||%||19.7||%|