Share-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of activity of stock options and awards of shares and stock units

The following table summarizes activity regarding our stock options and awards of shares and stock units since December 31, 2015:

Stock Options					Restricted Stock Units
	Shares		Weighted Average Price			Shares		Weighted Average Price
Balance, December 31, 2015	306,726		$	23.42	Balance, December 31, 2015	605,488		$	39.47
Granted	—		—		Granted	191,936		$	46.86
Expired	—		—		Forfeited	(965	)	$	43.13
Exercised	(163,726	)	$	23.73	Vested	(304,171	)	$	35.29
Balance, December 31, 2016	143,000		$	23.06	Balance, December 31, 2016	492,288		$	44.93
Granted	—		—		Granted	198,179		$	68.33
Expired	—		—		Forfeited	(1,200	)	$	60.68
Exercised	(50,000	)	$	20.42	Vested	(180,395	)	$	44.57
Balance, December 31, 2017	93,000		$	24.48	Balance, December 31, 2017	508,872		$	54.13
Granted	—		—		Granted	135,259		$	80.37
Expired	—		—		Forfeited	(1,250	)	$	71.27
Exercised	(53,000	)	$	24.48	Vested	(166,295	)	$	48.44
Balance, December 31, 2018	40,000		$	24.48	Balance, December 31, 2018	476,586		$	63.52

Summary of information about stock options

The following table summarizes information about our outstanding stock options as of December 31, 2018:

Stock Options Outstanding and Exercisable
Range of Exercise Prices	Number	Weighted Average Remaining Life	Weighted Average Exercise Price
$24.48	40,000	1.45 Years	$24.48