Stockholders' Equity and Equity Compensation (Tables)

3 Months Ended

Mar. 31, 2015

Equity [Abstract]

Summary of all stock award activity

The following table summarizes all stock award activity during the quarter ended March 31, 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	618,914		17.22
Restricted shares distributed	(79,110	)	19.22
Restricted stock units distributed	(10,856	)	19.17
Restricted shares forfeited	(18,195	)	23.23
Restricted stock units forfeited	(7,093	)	24.15
Outstanding at March 31, 2015	1,271,200		$	19.80

Summary of all deferred stock unit activity

The following table summarizes all deferred stock unit activity during the quarter ended March 31, 2015:

	Deferred Stock Units		Weighted Average Award Date Fair Value
Outstanding at January 1, 2015	221,471		$	20.10
Awarded	2,437		17.33
Distributed	(3,257	)	26.10
Outstanding at March 31, 2015	220,651		$	19.98

Summary of stock option activity

The following table summarizes all stock option activity during the quarter ended March 31, 2015:

	Shares		Weighted Average Exercise Price
Outstanding at January 1, 2015	503,134		$	18.18
Granted	—		—
Exercised	(100,191	)	12.97
Canceled/Expired	—		—
Outstanding at March 31, 2015	402,943		$	19.48
Exercisable at March 31, 2015	392,338		$	19.46

Financial data for stock option exercises

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

	Quarters Ended March 31,
	2015		2014
Amount collected from stock option exercises	$	1,299	$	1,190
Total intrinsic value of stock option exercises	273		444
Tax benefit of stock option exercises recorded in additional paid-in-capital	100		34
Aggregate intrinsic value of outstanding stock options	543		7,835
Aggregate intrinsic value of exercisable stock options	543		7,095

Summary of valuation assumptions

The fair value of stock options awarded during the quarter ended March 31, 2014 was estimated at the date of grant based on the assumptions presented in the table below:

	Quarter Ended March 31, 2014
Grant-date fair value	$11.27
Volatility	41.6%
Expected term (years)	7.0
Dividend yield	—%
Risk-free rate	2.3%