Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Stock-Based Compensation

Summary of activity under the entity's stock option plans

        The following table summarizes activity under our stock option plans (shares in thousands):

	Year Ended December 31,
	2015
Stock Options	Shares			Weighted- Average Exercise Price
Outstanding at beginning of year		910		$	12.95
Granted		132		$	19.67
Exercised		(318	)	$	11.78
Forfeited		—		$	—
Expired		—		$	—
Outstanding at end of year		724		$	14.69
Options exercisable at end of year		437

Summary information about stock options outstanding

        The following table summarizes information about stock options outstanding at December 31, 2015 (shares in thousands):

	Options Outstanding
			Weighted- Average Remaining Contractual Life				Options Exercisable
Range of Exercise Prices	Number Outstanding at 12/31/15				Weighted- Average Exercise Price		Number Exercisable at 12/31/15		Weighted- Average Exercise Price
$7.95 - $12.94		202		4.98	$	11.56		202	$	11.56
$12.95 - $17.94		390		6.61	$	14.63		235	$	14.13
$17.95 - $19.67		132		9.24	$	19.67		—	$	—
$7.95 - $19.67		724		6.63	$	14.69		437	$	12.94

Schedule of fair values and the assumptions used for the grants

	Year Ended December 31,
	2015	2014	2013
Weighted-average fair value per share of options granted	$6.33	$6.24	$5.06
Fair value assumptions:
Expected dividend yield	1.51%	1.34%	1.82%
Expected stock price volatility	38.4%	45.2%	46.6%
Risk-free interest rate	1.50%	1.91%	0.96%
Expected term	5.6 years	5.6 years	5.6 years

Summary of information about nonvested stock option awards and changes

        The following table summarizes information about nonvested stock option awards as of December 31, 2015 and changes for the year ended December 31, 2015 (shares in thousands):

Stock Options	Shares			Weighted-Average Grant Date Fair Value
Nonvested at December 31, 2014		323		$	5.43
Granted		132		$	6.33
Vested		(168	)	$	5.03
Forfeited		—			—
Nonvested at December 31, 2015		287		$	6.07

Summary of activity under the entity's restricted stock plans

        The following table summarizes activity under our restricted stock plans (shares in thousands):

	Year Ended December 31,
	2015
Restricted Stock and Restricted Stock Units	Shares			Weighted- Average Grant Date Fair Value
Unvested at beginning of year		160		$	14.42
Granted		113		$	20.64
Vested		(121	)	$	16.42
Forfeited		(3	)	$	14.45
Unvested at end of year		149		$	17.48