CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 7,478	$ 7,960
Receivables, net of allowance for doubtful accounts of $344 and $370	31,650	26,073
Inventories	1,043	1,668
Income taxes receivable	3,334	970
Deferred income taxes, net	2,377	2,660
Prepaid expenses	2,753	2,545
Other	1,034	1,386
Total current assets	49,669	43,262
Investments	3,595	3,414
Property, plant and equipment	471,823	461,712
Accumulated depreciation and amortization	(293,754)	(280,386)
Property, plant and equipment, net	178,069	181,326
Other assets:
Goodwill	29,028	29,028
Intangible assets, net	3,827	4,088
Deferred costs and other assets	6,435	5,762
Total other assets	39,290	38,878
Total assets	270,623	266,880
Current liabilities:
Accounts payable	3,586	3,163
Extended term payable	13,068	8,879
Deferred revenue	5,202	6,056
Accrued expenses and other	11,201	10,443
Financial derivative instruments	371	242
Current maturities of long-term obligations	1,504	1,586
Total current liabilities	34,932	30,369
Long-term liabilities:
Debt obligations, net of current maturities	132,938	133,621
Accrued income taxes	246	244
Deferred revenue	2,570	2,705
Financial derivative instruments	537	1,184
Accrued employee benefits and deferred compensation	12,357	12,344
Deferred income taxes	37,199	37,103
Total long-term liabilities	185,847	187,201
Total liabilities	220,779	217,570
Commitments and contingencies
Shareholders' equity:
Common stock, no par value, $0.10 stated value, Shares authorized: 100,000,000 Shares issued and outstanding: 13,646,449 in 2014 and 13,568,871 in 2013	1,365	1,357
Additional paid-in capital	17,271	16,462
Retained earnings	30,675	30,782
Accumulated other comprehensive income	533	709
Total shareholders' equity	49,844	49,310
Total liabilities and shareholders' equity	$ 270,623	$ 266,880