Condensed Consolidated Balance Sheets (USD $) In Thousands	Oct. 01, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 6,637	$ 12,017
Accounts receivable, net	104,123	80,432
Operating supplies	5,639	4,961
Other current assets	20,563	18,465
Total current assets	136,962	115,875
Property and equipment	436,415	416,071
Less accumulated depreciation	304,444	286,444
Property and equipment, net	131,971	129,627
Other assets	18,706	14,950
Identified intangible assets and goodwill, net	27,544	27,855
Total assets	315,183	288,307
Current liabilities:
Accounts payable	28,659	27,759
Accrued expenses	31,105	30,873
Other current liabilities	40,387	31,410
Total current liabilities	100,151	90,042
Long-term debt	75,027	61,591
Self-insurance accruals	29,695	30,658
Other noncurrent liabilities	7,848	7,647
Total liabilities	212,721	189,938
Common shareholders' equity:
Common shares, $1.00 par value, per share; 24,000 shares authorized; 21,457 shares issued	21,457	21,457
Additional paid-in capital	1,544	0
Retained earnings	185,206	176,800
Accumulated other comprehensive loss	(3,285)	(3,072)
Stockholders' Equity before Treasury Stock	204,922	195,185
Less: Cost of Common shares held in treasury; 7,525 shares at October 1, 2011 and 7,345 shares at December 31, 2010	102,460	96,816
Stockholders' Equity Attributable to Parent	102,462	98,369
Total liabilities and shareholders' equity	$ 315,183	$ 288,307