Stockholder's Equity (Tables)

3 Months Ended

Mar. 31, 2016

Equity [Abstract]

Nonvested Stock Activity

The following table represents the nonvested stock activity for the three months ended March 31, 2016:

	Number of shares		Weighted average grant date fair value
Nonvested shares outstanding as of December 31, 2015	527,091		$	26.64
Granted	181,100		$	37.43
Vested	(140,620	)	$	25.86
Forfeited	(12,566	)	$	24.36
Nonvested shares outstanding as of March 31, 2016	555,005		$	30.41

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 three months ended March 31, 2016	5,341	$	43.03
Shares available as of March 31, 2016	208,419