Net Income Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Net Income Per Share [Abstract]

Basic and diluted net income per share

	Three Months Ended				Nine Months Ended
	March 31,				March 31,
	2012		2011		2012		2011
Numerator:
Net income	$	11,446	$	13,496	$	41,844	$	49,873
Denominator:
Shares, basic		33,389		33,992		32,935		34,118
Effect of dilutive share-based awards		1,790		1,354		1,439		1,447
Shares, diluted		35,179		35,346		34,374		35,565
Net income per share:
Basic	$	0.34	$	0.40	$	1.27	$	1.46
Diluted	$	0.33	$	0.38	$	1.22	$	1.40