Stockholder's Equity (Tables)

9 Months Ended

Sep. 30, 2015

Equity [Abstract]

Nonvested Stock Activity

The following table represents the nonvested stock activity for the nine months ended September 30, 2015:

	Number of shares		Weighted average grant date fair value
Nonvested shares outstanding as of December 31, 2014	524,287		$	22.56
Granted	199,065		$	34.06
Vested	(176,195	)	$	23.23
Forfeited	(15,880	)	$	22.44
Nonvested shares outstanding as of September 30, 2015	531,277		$	26.65

Shares of Common Stock Issued During 2014 Under Employee Stock Purchase Plan

The table below details the shares of common stock issued during 2015:

	Number of shares	Per share price
Shares available as of December 31, 2014	236,483
Shares issued during three months ended March 31, 2015	7,068	$	29.62
Shares issued during three months ended June 30, 2015	5,702	$	31.38
Shares issued during three months ended September 30, 2015	4,953	$	36.34
Shares available as of September 30, 2015	218,760