Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income	$ 3,850	$ 1,533
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,860	13,002
Amortization of debt discount	97
Amortization of debt issuance costs	288	282
Non-cash rental expense, net of non-cash rental income	(859)	(1,120)
Compensation expense incurred in connection with stock options and common stock grants	329	348
Decrease in deferred tax asset	2,413	518
Net change in certain operating assets and liabilities	(1,451)	12,594
Increase in deferred membership costs	(750)	(1,200)
Landlord contributions to tenant improvements	663	149
Decrease in insurance reserves	(589)	(330)
Other	(447)	(368)
Total adjustments	12,554	23,875
Net cash provided by operating activities	16,404	25,408
Cash flows from investing activities:
Capital expenditures	(2,348)	(5,335)
Net cash used in investing activities	(2,348)	(5,335)
Cash flows from financing activities:
Repayment of 2007 Term Loan Facility		(14,062)
Principal payment on 2011 Term Loan Facility	(20,257)
Proceeds from exercise of stock options	349	117
Tax benefit from stock option exercises	326	20
Net cash used in financing activities	(19,582)	(13,925)
Effect of exchange rate changes on cash	37	282
Net (decrease) increase in cash and cash equivalents	(5,489)	6,430
Cash and cash equivalents beginning of period	47,880	38,803
Cash and cash equivalents end of period	42,391	45,233
Summary of the change in certain operating assets and liabilities:
Increase in accounts receivable	(2,421)	(1,729)
Decrease (increase) in inventory	128	(120)
Decrease in prepaid expenses and other current assets	1,215	4,589
(Decrease) increase in accounts payable, accrued expenses and accrued interest	(7,082)	687
Change in prepaid corporate income taxes	(308)	1,437
Increase in deferred revenue	7,017	7,730
Net change in certain operating assets and liabilities	(1,451)	12,594
Supplemental disclosures of cash flow information:
Cash payments for interest	5,747	9,012
Cash payments for income taxes	$ 14	$ 66