CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 78,585	$ 36,193
Accounts receivable, net	54,184	69,789
Income taxes receivable	17,311	0
Inventory, net	5,704	39,043
Prepaid expenses	17,111	16,440
Total current assets	172,895	161,465
Investments, including $3,279 and $2,907 carried at fair value	11,472	10,276
Property, plant and equipment, net	686,327	698,122
Other Assets:
Intangible assets, net	380,979	454,532
Goodwill	146,497	145,256
Deferred charges and other assets, net	13,690	14,756
Total assets	1,411,860	1,484,407
Current Liabilities:
Current maturities of long-term debt, net of unamortized loan fees	64,397	32,041
Accounts payable	28,953	72,810
Advanced billings and customer deposits	21,153	20,427
Accrued compensation	9,167	9,465
Income taxes payable	0	435
Accrued liabilities and other	13,914	29,085
Total current liabilities	137,584	164,263
Long-term debt, less current maturities, net of unamortized loan fees	757,561	797,224
Other Long-Term Liabilities:
Deferred income taxes	100,879	151,837
Deferred lease	15,782	18,042
Asset retirement obligations	21,211	15,666
Retirement plan obligations	13,328	17,738
Other liabilities	15,293	23,743
Total other liabilities	166,493	227,026
Commitments and Contingencies (Note 12)
Shareholders’ Equity:
Common stock, no par value, authorized 96,000 shares; issued and outstanding 49,328 shares in 2017 and 48,935 shares in 2016	44,787	45,482
Retained earnings	297,205	243,624
Accumulated other comprehensive income (loss), net of taxes	8,230	6,788
Total shareholders’ equity	350,222	295,894
Total liabilities and shareholders’ equity	$ 1,411,860	$ 1,484,407