Related-Party Transactions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Related Party Transaction [Line Items]
Yellow Corporation completed spin-off on September 30.2002	100.00%
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Letters of Credit	$ 1.6	$ 1.7
Cost plus basis points	1.25%