Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 15,644	$ 25,032
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	11,975	9,957
Stock-based compensation	5,025	4,807
Provision for doubtful accounts	4,094	1,854
Deferred income tax provision	1,740	1,740
Changes in:
Accounts receivable	(1,991)	(1,301)
Inventories	1,747	(6,151)
Prepaid expenses and other current assets	(3,516)	(585)
Other assets	(5,739)	(3,293)
Accounts payable	(3,487)	4,429
Accrued expenses	(10,220)	2,517
Deferred tuition revenue	2,394	381
Deferred revenue	(6,172)	12,475
Deferred rent	(87)	248
Gift certificate liability	(1,080)	(1,247)
Net cash provided by operating activities	10,327	50,863
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(10,015)	(12,338)
Net cash used in investing activities	(10,015)	(12,338)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of treasury shares	(29,503)	(2,601)
Proceeds from long-term debt	3,000
Payments for long-term debt	(3,058)	(29,246)
Payments of debt issuance costs		(352)
Proceeds from share option exercises	63	875
Net cash used in financing activities	(29,498)	(31,324)
EFFECT OF EXCHANGE RATE CHANGES ON CASH	(852)	717
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(30,038)	7,918
CASH AND CASH EQUIVALENTS, Beginning of period	75,252	75,028
CASH AND CASH EQUIVALENTS, End of period	45,214	82,946
Cash paid during the period for:
Interest	977	1,908
Income taxes	$ 1,537	$ 1,729