CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 7,960	$ 8,305
Receivables, net of allowance for doubtful accounts of $370 and $278	26,073	22,530
Inventories	1,668	6,201
Income taxes receivable	970	596
Deferred income taxes, net	2,660	1,887
Prepaid expenses	2,545	2,092
Other	1,386	1,399
Total current assets	43,262	43,010
Investments	3,414	3,213
Property, plant and equipment	461,712	437,623
Accumulated depreciation and amortization	(280,386)	(254,664)
Property, plant and equipment, net	181,326	182,959
Other assets:
Goodwill	29,028	29,028
Intangible assets, net	4,088	4,811
Deferred costs and other assets	5,762	5,283
Total other assets	38,878	39,122
Total assets	266,880	268,304
Current liabilities:
Accounts payable	3,163	5,818
Extended term payable	8,879	8,115
Deferred revenue	6,056	7,362
Accrued expenses and other	10,443	10,881
Financial derivative instruments	242	0
Current maturities of long-term obligations	1,586	1,648
Total current liabilities	30,369	33,824
Long-term liabilities:
Debt obligations, net of current maturities	133,621	135,133
Accrued income taxes	244	236
Deferred revenue	2,705	1,085
Financial derivative instruments	1,184	2,432
Accrued employee benefits and deferred compensation	12,344	12,481
Deferred income taxes	37,103	34,265
Total long-term liabilities	187,201	185,632
Total liabilities	217,570	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: 13,568,871 in 2013 and 13,519,131 in 2012	1,357	1,352
Additional paid-in capital	16,462	15,950
Retained earnings	30,782	30,987
Accumulated other comprehensive income	709	559
Total shareholders' equity	49,310	48,848
Total liabilities and shareholders' equity	$ 266,880	$ 268,304