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	$ 14,570	$ 13,629
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,788	4,082
Stock-based compensation	2,940	2,337
Provision for doubtful accounts	717	525
Deferred income tax provision	870	498
Changes in:
Accounts receivable	(10,304)	(2,380)
Inventories	1,285	(2,316)
Prepaid expenses and other current assets	(111)	(2,088)
Other assets	205	354
Deferred customer acquisition costs	(3,035)	0
Accounts payable	1,340	1,629
Accrued expenses	(9,731)	(7,336)
Income taxes payable	(941)	(481)
Deferred tuition revenue	3,031	4,380
Deferred revenue	8,496	0
Deferred rent	(249)	19
Gift certificate liability	(730)	(540)
Net cash provided by operating activities	13,141	12,312
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(4,271)	(1,400)
Acquisition, net of cash acquired	0	(2,357)
Post-closing working capital adjustments related to acquisitions	3,614	0
Net cash used in investing activities	(657)	(3,757)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of treasury shares	(808)	(931)
Payments for long-term debt	(14,125)	(25,000)
Proceeds from share option exercises	354	1,067
Net cash used in financing activities	(14,579)	(24,864)
EFFECT OF EXCHANGE RATE CHANGES ON CASH	(344)	(703)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(2,439)	(17,012)
CASH AND CASH EQUIVALENTS, Beginning of period	62,645	61,731
CASH AND CASH EQUIVALENTS, End of period	60,206	44,719
Cash paid during the period for:
Interest	1,318	329
Income taxes	$ 1,962	$ 1,536