UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current Assets
Cash and cash equivalents	$ 75,467	$ 36,193
Accounts receivable, net of allowance of $479 and $449, respectively	64,396	69,789
Income taxes receivable	7,689	0
Inventory, net	7,439	39,043
Prepaid expenses and other	18,226	16,440
Total current assets	173,217	161,465
Investments, including $3,271 and $2,907 carried at fair value	11,319	10,276
Property, plant and equipment, net	683,355	698,122
Other Assets
Intangible assets, net	421,672	454,532
Goodwill	146,497	145,256
Deferred charges and other assets, net	11,012	14,756
Total assets	1,447,072	1,484,407
Current Liabilities
Current maturities of long-term debt, net of unamortized loan fees	54,316	32,041
Accounts payable	31,462	72,810
Advanced billings and customer deposits	21,109	20,427
Accrued compensation	7,373	9,465
Income taxes payable	0	435
Accrued liabilities and other	15,277	29,085
Total current liabilities	129,537	164,263
Long-term debt, less current maturities, net of unamortized loan fees	778,686	797,224
Other Long-Term Liabilities
Deferred income taxes	142,056	151,837
Deferred lease payable	21,089	18,042
Asset retirement obligations	19,240	15,666
Retirement plan obligations	16,939	17,738
Other liabilities	40,180	23,743
Total other long-term liabilities	239,504	227,026
Commitments and Contingencies
Shareholders’ Equity
Common stock	43,908	45,482
Retained earnings	249,419	243,624
Accumulated other comprehensive income (loss), net of taxes	6,018	6,788
Total shareholders’ equity	299,345	295,894
Total liabilities and shareholders’ equity	$ 1,447,072	$ 1,484,407

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.