Equity Incentive Plan (Tables)

9 Months Ended

Sep. 30, 2013

Equity Incentive Plan

Schedule of stock option activity

	Number of Shares Subject to Option		Weighted Average Exercise Price
Options outstanding, December 31, 2012	1,017,195		$	17.25
Granted	209,268		32.50
Forfeited	(23,865	)	21.22
Exercised	(40,277	)	15.65
Options outstanding, September 30, 2013	1,162,321		$	19.97

Schedule of unvested shares subject to option

	Number of Shares Subject to Option		Weighted Average Fair Value at Grant
Unvested balance, December 31, 2012	730,159		$	5.70
Granted	209,268		10.01
Forfeited	(23,865	)	6.69
Vested	(261,862	)	5.55
Unvested balance, September 30, 2013	653,700		$	7.11

Schedule of restricted awards

	Restricted Awards		Weighted Average Fair Value at Grant
Unvested balance, December 31, 2012	598,695		$	21.37
Granted	192,514		32.47
Forfeited	(16,902	)	25.08
Vested	(229,613	)	20.80
Unvested balance, September 30, 2013	544,694		$	25.42