Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 11,199	$ 10,267
Accounts receivable, net	118,394	90,795
Operating supplies	5,996	5,586
Other current assets	23,647	23,888
Total current assets	159,236	130,536
Property and equipment	451,522	438,989
Less accumulated depreciation	324,751	308,841
Property and equipment, net	126,771	130,148
Other assets	16,909	15,969
Identified intangible assets and goodwill, net	25,998	27,081
Total assets	328,914	303,734
Current liabilities:
Accounts payable	34,429	35,282
Accrued expenses	29,085	34,123
Other current liabilities	35,961	32,630
Total current liabilities	99,475	102,035
Long-term debt	58,088	51,136
Self-insurance accruals	38,002	30,472
Other noncurrent liabilities	15,442	19,365
Total liabilities	211,007	203,008
Common shareholders' equity:
Common shares, $1.00 par value, per share; 24,000 shares authorized; 21,457 shares issued and outstanding	21,457	21,457
Additional paid-in capital	3,861	1,721
Common shares subscribed, unissued	11,063	0
Retained earnings	203,839	188,613
Accumulated other comprehensive loss	(4,656)	(6,344)
Common shareholders' equity before treasury stock	235,564	205,447
Less: Cost of Common shares held in treasury; 7,642 shares at September 29, 2012 and 7,611 shares at December 31, 2011	108,255	104,721
Common shares subscription receivable	9,402	0
Common shareholders' equity	117,907	100,726
Total liabilities and shareholders' equity	$ 328,914	$ 303,734