Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash	$ 22,661	$ 13,121
Accounts receivable, net	195,906	168,671
Operating supplies	14,415	10,069
Prepaid expenses	19,529	15,893
Other current assets	2,557	1,371
Total current assets	255,068	209,125
Property and equipment:
Land and land improvements	17,350	18,215
Buildings and leasehold improvements	40,585	40,285
Equipment	581,461	557,536
Property and equipment	639,396	616,036
Less accumulated depreciation	437,111	422,853
Total property and equipment, net	202,285	193,183
Other assets	21,769	29,156
Intangible Assets, Net (Excluding Goodwill)	9,530	6,194
Goodwill	37,971	35,477
Total assets	526,623	473,135
Current liabilities:
Current portion of long-term debt and short-term debt	22,514	16,315
Current portion of capital leases	1,345	651
Accounts payable	43,958	45,093
Accrued expenses	44,061	42,816
Self-insurance accruals	27,434	23,782
Total current liabilities	139,312	128,657
Long-term debt	99,683	105,469
Senior unsecured notes	55,880	11,882
Capital leases	2,862	1,859
Self-insurance accruals	56,351	43,912
Other liabilities	10,125	19,966
Total liabilities	364,213	311,745
Redeemable common shares related to 401KSOP and Employee Stock Ownership Plan (ESOP): 5,642 and 6,467 shares at redemption value as of December 31, 2018 and 2017	119,049	123,520
Common shareholders' equity:
Common shares, $1.00 par value, per share; 48,000 shares authorized; 37,272 and 36,447 shares issued and outstanding before deducting treasury shares and which excludes 5,642 and 6,467 shares subject to redemption as of December 31, 2018 and 2017	37,272	36,447
Additional paid-in capital	82,623	58,554
Common shares subscribed	6,799	7,529
Retained earnings	157,472	143,835
Accumulated other comprehensive loss	(5,034)	(8,393)
Stockholders' equity before treasury stock	279,132	237,972
Less: Cost of Common shares held in treasury; 20,033 shares in 2018 and 18,693 in 2017	235,042	198,327
Common shares subscription receivable	729	1,775
Total common shareholders' equity	43,361	37,870
Total liabilities and shareholders' equity	$ 526,623	$ 473,135