UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 49,448	$ 78,585
Accounts receivable, net	51,095	54,184
Income taxes receivable	8,360	17,311
Inventory, net	8,161	5,704
Prepaid expenses and other	64,200	17,111
Total current assets	181,264	172,895
Investments, including $3,268 and $3,279 carried at fair value	11,717	11,472
Property, plant and equipment, net	672,017	686,327
Other Assets:
Intangible assets, net	413,537	380,979
Goodwill	146,497	146,497
Deferred charges and other assets, net	33,934	13,690
Total assets	1,458,966	1,411,860
Current Liabilities
Current maturities of long-term debt, net of unamortized loan fees	74,486	64,397
Accounts payable	27,194	28,953
Advanced billings and customer deposits	6,919	21,153
Accrued compensation	4,534	9,167
Accrued liabilities and other	17,471	13,914
Total current liabilities	130,604	137,584
Long-term debt, less current maturities, net of unamortized loan fees	736,387	757,561
Other Long-Term Liabilities
Deferred income taxes	115,809	100,879
Deferred lease	19,543	15,782
Asset retirement obligations	21,164	21,211
Retirement plan obligations	13,236	13,328
Other liabilities	13,787	15,293
Total other long-term liabilities	183,539	166,493
Shareholders’ Equity
Common stock	45,075	44,787
Retained earnings	352,069	297,205
Accumulated other comprehensive income (loss), net of taxes	11,292	8,230
Total shareholders’ equity	408,436	350,222
Total liabilities and shareholders’ equity	$ 1,458,966	$ 1,411,860

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.