Condensed Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Accounts Receivable Allowance (in Dollars)	$ 1,591	$ 1,729
Drivers' Advances and Other Receivables Allowance (in Dollars)	$ 1,238	$ 1,041
Treasury stock shares	955,605	1,059,643
Common Class A [Member]
Par value (in Dollars per share)	$ 0.01	$ 0.01
Shares authorized	20,000,000	20,000,000
Shares issued	13,469,090	13,469,090
Shares Outstanding	12,513,485	12,409,447
Common Class B [Member]
Par value (in Dollars per share)	$ 0.01	$ 0.01
Shares authorized	5,000,000	5,000,000
Shares issued	2,350,000	2,350,000
Shares Outstanding	2,350,000	2,350,000