UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current Assets
Cash and cash equivalents	$ 39,927	$ 36,193
Accounts receivable, net	68,709	69,789
Inventory, net	24,855	39,043
Prepaid expenses and other	16,989	16,440
Total current assets	150,480	161,465
Investments, including $3,058 and $2,907 carried at fair value	10,607	10,276
Property, plant and equipment, net	689,948	698,122
Other Assets
Intangible assets, net	443,308	454,532
Goodwill	144,001	145,256
Deferred charges and other assets, net	14,645	14,756
Total assets	1,452,989	1,484,407
Current Liabilities
Current maturities of long-term debt, net of unamortized loan fees	38,124	32,041
Accounts payable	25,390	72,810
Advanced billings and customer deposits	21,029	20,427
Accrued compensation	3,678	9,465
Income taxes payable	3,958	435
Accrued liabilities and other	18,174	29,085
Total current liabilities	110,353	164,263
Long-term debt, less current maturities, net of unamortized loan fees	810,873	797,224
Other Long-Term Liabilities
Deferred income taxes	149,763	151,837
Deferred lease payable	19,230	18,042
Asset retirement obligations	19,386	15,666
Retirement plan obligations	17,892	17,738
Other liabilities	26,057	23,743
Total other long-term liabilities	232,328	227,026
Commitments and Contingencies
Shareholders’ Equity
Common stock	46,083	45,482
Retained earnings	245,965	243,624
Accumulated other comprehensive income, net of taxes	7,387	6,788
Total shareholders’ equity	299,435	295,894
Total liabilities and shareholders’ equity	$ 1,452,989	$ 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).

Name:	us-gaap_AccountsPayableCurrent
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.