Stockholders' Equity and Equity Compensation (Tables)

6 Months Ended

Jun. 30, 2015

Equity [Abstract]

Summary of all stock award activity

The following table summarizes all stock award activity during the six months ended June 30, 2015:

	Stock Awards		Weighted Average Award Date Fair Value
Outstanding at January 1, 2015	767,540		$	21.93
Restricted shares awarded	—		—
Restricted stock units awarded	691,781		17.25
Restricted shares distributed	(87,600	)	19.07
Restricted stock units distributed	(10,856	)	19.17
Restricted shares forfeited	(45,207	)	23.64
Restricted stock units forfeited	(27,950	)	20.06
Outstanding at June 30, 2015	1,287,708		$	19.62

Summary of all deferred stock unit activity

The following table summarizes all deferred stock unit activity during the six months ended June 30, 2015:

	Deferred Stock Units		Weighted Average Award Date Fair Value
Outstanding at January 1, 2015	221,471		$	20.10
Awarded	51,199		18.61
Distributed	(12,819	)	19.89
Outstanding at June 30, 2015	259,851		$	19.81

Summary of stock option activity

The following table summarizes all stock option activity during the six months ended June 30, 2015:

	Shares		Weighted Average Exercise Price
Outstanding at January 1, 2015	503,134		$	18.18
Granted	—		—
Exercised	(100,191	)	12.97
Canceled/Expired	(5,546	)	24.21
Outstanding at June 30, 2015	397,397		$	19.41
Exercisable at June 30, 2015	392,338		$	19.44

Financial data for stock option exercises

Financial data for stock option exercises are summarized in the following table (in thousands):

	Six Months Ended June 30,
	2015		2014
Amount collected from stock option exercises	$	1,299	$	7,645
Total intrinsic value of stock option exercises	273		3,088
Tax shortfall (benefit) of stock option exercises recorded in additional paid-in-capital	100		(459		)
Aggregate intrinsic value of outstanding stock options	744		3,452
Aggregate intrinsic value of exercisable stock options	738		3,113

Summary of valuation assumptions

The fair value of stock options awarded during the six-month period ended June 30, 2014 was estimated at the date of grant based on the assumptions presented in the table below:

	Six Months Ended June 30, 2014
Grant-date fair value	$11.27
Volatility	41.6%
Expected term (years)	7.0
Dividend yield	—%
Risk-free rate	2.3%