Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 11,539	$ 9,736
Certificates of deposit	1,807	1,805
Accounts receivable, less allowance for doubtful accounts of $9,016 and $7,460	27,581	28,811
Other current assets	7,568	9,300
Total current assets	48,495	49,652
Property and equipment, net of accumulated depreciation of $206,767 and $198,962	66,998	68,381
Goodwill	98,238	98,238
Intangible assets, net of accumulated amortization of $44,687 and $44,139	5,713	6,261
Other assets	3,821	3,879
Total assets	223,265	226,411
Current liabilities:
Accounts payable	5,303	4,433
Accrued expenses and other current liabilities	20,821	20,361
Taxes payable	7,195	8,820
Deferred revenues	10,567	10,567
Current portion of capital lease obligations	1,871	1,818
Total current liabilities	45,757	45,999
Long-term debt	150,000	150,000
Deferred rent payable	4,832	4,822
Deferred revenues	1,089	1,077
Capital lease obligations, net of current portion	617	1,080
Deferred income taxes payable	6,190	5,948
Other	454	792
Total liabilities	208,939	209,718
Stockholders’ deficiency:
Common stock	100	100
Preferred stock	0	0
Additional paid-in capital	306,792	306,792
Accumulated deficit	(292,566)	(290,199)
Total stockholders’ deficiency	14,326	16,693
Total liabilities and stockholders’ deficiency	$ 223,265	$ 226,411