Stockholder's Equity (Tables)

9 Months Ended

Sep. 30, 2013

Equity [Abstract]

Nonvested Stock Activity

The following table represents the nonvested stock activity for the nine months ended September 30, 2013:

	Number of Shares			Weighted average grant date fair value
Nonvested shares outstanding as of December 31, 2012		486,061		$	22.33
Granted		205,948		$	21.21
Vested		(175,721	)	$	21.82
Nonvested shares outstanding as of September 30, 2013		516,288		$	22.05

Shares of Common Stock Issued During 2013 Under Employee Stock Purchase Plan

The table below details the shares of common stock issued during 2013:

	Number of Shares		Per share price
Shares available as of December 31, 2012		61,247
Additional shares authorized for issuance		250,000
Shares issued during three months ended March 31, 2013		8,845	$	20.24
Shares issued during three months ended June 30, 2013		10,385	$	20.43
Shares issued during three months ended September 30, 2013		9,600	$	18.60
Shares available as of September 30, 2013		282,417