Consolidated Condensed Balance Sheets(Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Accounts Receivable Allowance (in Dollars)	$ 1,547	$ 1,711
Drivers' Advances and Other Receivables Allowance (in Dollars)	$ 807	$ 730
Treasury stock shares	1,065,885	1,097,538
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	12,403,205	12,371,552
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