Stockholder's Equity (Tables)

9 Months Ended

Sep. 30, 2016

Equity [Abstract]

Nonvested Stock Activity

The following table represents the nonvested stock activity for the nine months ended September 30, 2016:

	Number of shares		Weighted average grant date fair value
Nonvested shares outstanding as of December 31, 2015	527,091		$	26.64
Granted	231,100		$	38.01
Vested	(172,586	)	$	25.77
Forfeited	(13,511	)	$	25.27
Nonvested shares outstanding as of September 30, 2016	572,094		$	31.53

Shares of Common Stock Issued During 2016 Under Employee Stock Purchase Plan

The table below details the shares of common stock issued during 2016:

	Number of shares	Per share price
Shares available as of December 31, 2015	213,760
Shares issued during the three months ended March 31, 2016	5,341	$	43.03
Shares issued during the three months ended June 30, 2016	6,434	$	33.78
Shares issued during the three months ended September 30, 2016	5,239	$	41.12
Shares available as of September 30, 2016	196,746