Consolidated Statements of Income (USD $) In Thousands, except Share data	12 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2009
Consolidated Statements of Income [Abstract]
Revenue	$ 817,009		$ 670,035		$ 515,826
Cost of revenue	287,806	[1]	240,195	[1]	191,944	[1]
Technology and development expense	93,626	[1]	78,387	[1]	60,921	[1]
Marketing and selling expense	271,838	[1]	216,574	[1]	159,143	[1]
General and administrative expense	70,659	[1]	58,031	[1]	42,236	[1]
Income from operations	93,080		76,848		61,582
Interest income	435		441		1,725
Other expense, net	2,197		1,491		803
Interest expense	196		784		1,401
Income before income taxes	91,122		75,014		61,103
Income tax provision	9,013		7,273		5,417
Net income	82,109		67,741		55,686
Basic net income per share	$ 1.89		$ 1.56		$ 1.29
Diluted net income per share	$ 1.83		$ 1.49		$ 1.25
Weighted average shares outstanding - basic	43,431,326		43,365,872		43,330,166
Weighted average shares outstanding - diluted	44,951,199		45,336,561		44,634,191
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	21,677		22,380		19,473
Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	686		840		745
Technology and development expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	4,178		5,790		5,053
Marketing and selling expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	3,841		4,965		4,021
General and administrative expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 12,972		$ 10,785		$ 9,654

[1] Share-based compensation is allocated as follows: