CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 14,431	$ 13,057
Short-term investments	2,998	0
Receivables, net of allowance for doubtful accounts of $215 and $436	21,403	25,317
Inventories	5,060	9,297
Income taxes receivable	639	498
Deferred income taxes, net	1,559	1,559
Prepaid expenses	2,202	1,801
Other	960	964
Total current assets	49,252	52,493
Investments	3,210	4,277
Property, plant and equipment	415,545	396,816
Accumulated depreciation	(241,395)	(242,886)
Property, plant and equipment, net	174,150	153,930
Other assets:
Goodwill	29,028	27,303
Intangible assets, net	5,257	2,314
Deferred costs and other	3,689	3,669
Total other assets	37,974	33,286
Total assets	264,586	243,986
Current liabilities:
Accounts payable	3,135	4,661
Extended term payable	8,191	6,920
Deferred revenue	5,658	6,251
Accrued expenses and other	8,781	10,175
Current maturities of long-term obligations	1,614	1,407
Total current liabilities	27,379	29,414
Long-term liabilities:
Debt obligations, net of current maturities	139,874	118,828
Accrued income taxes	143	154
Deferred revenue	1,046	1,131
Financial derivative instruments	2,633	2,469
Accrued employee benefits and deferred compensation	19,724	18,166
Deferred income taxes	30,253	30,627
Total long-term liabilities	193,673	171,375
Total liabilities	221,052	200,789
Commitments and contingencies
Shareholders' equity:
Common stock, no par value, $.10 stated value Shares authorized: 100,000,000 Shares issued and outstanding: 13,494,399 in 2012 and 13,396,176 in 2011	1,349	1,340
Additional paid-in capital	16,211	15,683
Retained earnings	32,160	31,797
Accumulated other comprehensive (loss)	(6,186)	(5,623)
Total shareholders' equity	43,534	43,197
Total liabilities and shareholders' equity	$ 264,586	$ 243,986