NET INCOME PER SHARE (Tables)

12 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

Calculation of basic and diluted net income per share

The following table sets forth the calculation of basic and diluted net income per share (in thousands except per share data):

	Year Ended December 31,
	2011		2012		2013
Numerator:
Net income	$	14,656	$	9,915	$	29,734
Denominator:
Denominator for basic net income per share — weighted-average outstanding shares	23,131		26,533		27,670
Effect of dilutive securities:
Stock options and restricted stock	396		416		542
Denominator for diluted net income per share — weighted-average outstanding shares	23,527		26,949		28,212
Net income per share — basic	$	0.63	$	0.37	$	1.07
Net income per share — diluted	$	0.62	$	0.37	$	1.05