Stockholder's Equity (Tables)

3 Months Ended

Mar. 31, 2015

Equity [Abstract]

Nonvested Stock Activity

The following table represents the nonvested stock activity for the three months ended March 31, 2015:

	Number of shares		Weighted average grant date fair value
Nonvested shares outstanding as of December 31, 2014	524,287		$	22.56
Granted	191,065		$	33.80
Vested	(146,424	)	$	22.82
Nonvested shares outstanding as of March 31, 2015	568,928		$	26.26

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 available as of March 31, 2015	229,415