Net Income Per Share (Tables)

12 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

 The following presents a reconciliation of the numerator and denominator used in the calculation of basic net income per share and a reconciliation of the denominator used in the calculation of diluted net income per share (in thousands, except share and per share data):

	Year Ended December 31,
	2013			2012			2011
Numerator:
Net income, as reported	$	31,085		$	28,965		$	22,669
Less: net income attributable to participating securities		(503	)		(469	)		(367	)
Net income available to common shareholders—basic and diluted for 2013, basic for 2012, basic and diluted for 2011	$	30,582		$	28,496		$	22,302
Denominator:
Basic:
Weighted-average shares of common stock outstanding		38,470,376			36,914,163			35,939,104
Less: weighted-average shares of unvested restricted common stock outstanding		(636,559	)		(602,328	)		(581,474	)
Weighted-average number of common shares used in computing basic net income per common share		37,833,817			36,311,835			35,357,630
Net income per share applicable to common shareholders—basic	$	0.81		$	0.78		$	0.63
Denominator:
Diluted:
Weighted-average shares of common stock outstanding		38,470,376						35,939,104
Less: weighted-average shares of unvested restricted common stock outstanding		(636,559	)					(581,474	)
Weighted-average number of common shares issuable upon exercise of outstanding stock options, based on the treasury stock method		1,240,629						1,326,873
Weighted-average number of shares of restricted common stock outstanding, based on the treasury stock method		211,205						132,876
Weighted-average number of common shares used in computing diluted net income per common share		39,285,651						36,817,379
Net income per share applicable to common shareholders—diluted	$	0.78					$	0.61
Numerator:
Net income available to common shareholders—basic				$	28,496
Plus: undistributed earnings allocated to participating securities					424
Less: undistributed earnings reallocated to participating securities					(410	)
Net income available to common shareholders—diluted				$	28,510
Denominator:
Diluted:
Weighted-average shares of common stock outstanding					36,914,163
Less: weighted-average shares of unvested restricted common stock outstanding					(602,328	)
Weighted-average number of common shares issuable upon exercise of outstanding stock options, based on the treasury stock method					1,250,118
Weighted-average number of common shares used in computing diluted net income per common share					37,561,953
Net income per share applicable to common shareholders—diluted				$	0.76

Schedule of Anti-Dilutive Securities Excluded from Computation of Earnings Per Share

The following common share equivalents have been excluded from the computation of diluted weighted-average shares outstanding, for the periods indicated, as their effect would have been anti-dilutive:

	Year Ended December 31,
	2013		2012		2011
Unvested restricted common stock		17,620		1,459		14,322
Options		390,974		1,638,905		1,479,608