CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 6,516	$ 8,305
Receivables, net of allowance for doubtful accounts of $312 and $278	22,598	22,530
Inventories	5,408	8,379
Income taxes receivable	0	596
Deferred income taxes, net	1,623	1,887
Prepaid expenses	2,610	2,092
Other	1,106	1,399
Total current assets	39,861	45,188
Investments	3,414	3,213
Property, plant and equipment	455,290	437,623
Accumulated depreciation and amortization	(273,608)	(254,664)
Property, plant and equipment, net	181,682	182,959
Other assets:
Goodwill	29,028	29,028
Intangible assets, net	4,108	4,811
Deferred costs and other	2,865	3,105
Total other assets	36,001	36,944
Total assets	260,958	268,304
Current liabilities:
Accounts payable	3,191	5,818
Extended term payable	7,520	8,115
Deferred revenue	5,415	7,362
Accrued expenses and other	8,734	10,881
Financial derivative instruments	318	0
Current maturities of long-term obligations	1,584	1,648
Total current liabilities	26,762	33,824
Long-term liabilities:
Debt obligations, net of current maturities	134,018	135,133
Accrued income taxes	222	236
Deferred revenue	2,867	1,085
Financial derivative instruments	1,356	2,432
Accrued employee benefits and deferred compensation	12,857	12,481
Deferred income taxes	34,111	34,265
Total long-term liabilities	185,431	185,632
Total liabilities	212,193	219,456
Commitments and contingencies
Shareholders' equity:
Common stock, no par value, $0.10 stated value, Shares authorized: 100,000,000 Shares issued and outstanding: 13,553,160 in 2013 and 13,519,131 in 2012	1,355	1,352
Additional paid-in capital	16,188	15,950
Retained earnings	30,896	30,987
Accumulated other comprehensive income	326	559
Total shareholders' equity	48,765	48,848
Total liabilities and shareholders' equity	$ 260,958	$ 268,304