Stock-Based Compensation Converted Stock (Details) (USD $)	Oct. 02, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RailAmerica restricted stock awards before conversion	432,000
RailAmerica restricted stock units before conversion	775,000
RailAmerica converted restricted stock awards	180,000
Converted RailAmerica restricted stock units	322,000
Conversion ratio	0.4151
Equity awards conversion price for RailAmerica converted shares	$ 66.26
RailAmerica [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Business acquisition, share price	$ 27.50