Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 70,320	$ 47,924
Trade receivables, net of allowance for doubtful accounts of $3,162 and $3,040 (including related parties of $5,116 and $5,534)	62,317	66,399
Prepaid expenses and other current assets (including related parties of $274 and $274)	6,602	5,705
Total current assets	139,239	120,028
Property and equipment, net of accumulated depreciation of $203,030 and $198,282	55,719	57,874
Intangible assets subject to amortization, net of accumulated amortization of $80,885 and $78,234 (including related parties of $12,178 and $13,918)	14,005	16,656
Intangible assets not subject to amortization	220,701	220,701
Goodwill	50,081	50,081
Deferred income taxes	49,000	57,929
Other assets	2,314	1,693
Total assets	531,059	524,962
Current liabilities
Current maturities of long-term debt	3,750	3,750
Accounts payable and accrued expenses (including related parties of $3,955 and $3,791)	28,440	29,787
Total current liabilities	32,190	33,537
Long-term debt, less current maturities, net of unamortized debt issuance costs of $2,704 and $3,226	307,296	309,587
Other long-term liabilities	14,687	14,565
Total liabilities	354,173	357,689
Commitments and contingencies (note 4)
Stockholders' equity
Additional paid-in capital	906,375	910,228
Accumulated deficit	(725,450)	(738,849)
Accumulated other comprehensive income (loss)	(4,048)	(4,115)
Total stockholders' equity	176,886	167,273
Total liabilities and stockholders' equity	531,059	524,962
Class A common stock
Stockholders' equity
Common stock	6	6
Class B common stock
Stockholders' equity
Common stock	2	2
Class U common stock
Stockholders' equity
Common stock	$ 1	$ 1

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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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.