CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
CURRENT ASSETS
Cash and cash equivalents	$ 114,834	$ 102,578
Short-term investments	37,579	39,288
Restricted cash equivalents and short-term investments	51,681	51,661
Accounts receivable, less allowances (2011 - $5,737; 2010 - $3,944)	170,660	145,426
Other accounts receivable, less allowances (2011 - $1,214; 2010 - $1,254)	7,415	8,157
Prepaid expenses	9,422	10,258
Deferred income taxes	35,596	32,681
Prepaid and refundable income taxes	2,209	3,958
Other	5,221	5,677
TOTAL CURRENT ASSETS	434,617	399,684
PROPERTY, PLANT AND EQUIPMENT
Land and structures	241,082	243,981
Revenue equipment	551,411	530,424
Service, office and other equipment	167,329	163,732
Leasehold improvements	21,198	21,890
TOTAL PROPERTY, PLANT AND EQUIPMENT, GROSS	981,020	960,027
Less allowances for depreciation and amortization	582,686	552,781
TOTAL PROPERTY, PLANT AND EQUIPMENT, NET	398,334	407,246
OTHER ASSETS	54,564	54,021
TOTAL ASSETS	887,515	860,951
CURRENT LIABILITIES
Bank overdraft and drafts payable	15,820	13,023
Accounts payable	82,950	62,134
Income taxes payable	348	196
Accrued expenses	157,589	144,543
Current portion of long-term debt	15,386	14,001
TOTAL CURRENT LIABILITIES	272,093	233,897
LONG-TERM DEBT, less current portion	38,160	42,657
PENSION AND POSTRETIREMENT LIABILITIES	65,204	65,421
OTHER LIABILITIES	17,713	19,827
DEFERRED INCOME TAXES	17,878	19,405
STOCKHOLDERS' EQUITY
Common stock, $0.01 par value, authorized 70,000,000 shares; issued 2011: 27,099,819 shares; 2010: 26,934,847 shares	271	269
Additional paid-in capital	284,771	281,169
Retained earnings	283,034	292,129
Treasury stock, at cost, 1,677,932 shares	(57,770)	(57,770)
Accumulated other comprehensive loss	(33,839)	(36,053)
TOTAL STOCKHOLDERS' EQUITY	476,467	479,744
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 887,515	$ 860,951