Stock Options and Other Equity-Based Incentive Instruments (Tables)

9 Months Ended

Sep. 30, 2017

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

Stock option activity during the nine months ended September 30, 2017 is summarized in the following table:


	Number of Shares			Option Price per Share					Weighted Average Exercise Price		Weighted Average Fair Value on Date of Grant
Outstanding at December 31, 2016		592,250		$	12.63	to	$	23.21	$	17.12
Options granted		—			—	to		—		—		—
Options exercised		(133,850	)	$	14.54	to	$	22.54	$	18.07
Options forfeited		—			—	to		—		—
Outstanding at September 30, 2017		458,400		$	12.63	to	$	23.21	$	16.85

Summary of Options Outstanding

The following table shows the number, weighted-average exercise price, intrinsic value, and weighted average remaining contractual life of options exercisable, options not yet exercisable and total options outstanding as of September 30, 2017:


	Currently Exercisable		Currently Not Exercisable		Total Outstanding
Number of options		431,100		27,300		458,400
Weighted average exercise price	$	16.61	$	20.54	$	16.85
Intrinsic value (in thousands)	$	10,406	$	552	$	10,958
Weighted average remaining contractual term (yrs.)		4.0		6.1		4.1

Restricted Stock Unit (RSU) Activity

Restricted stock unit (RSU) activity is summarized in the following table for the dates indicated:


	Service Condition Vesting RSUs					Market Plus Service Condition Vesting RSUs
	Number of RSUs			Weighted Average Fair Value on Date of Grant		Number of RSUs			Weighted Average Fair Value on Date of Grant
Outstanding at December 31, 2016		68,450					47,426
RSUs granted		29,669		$	35.36		17,939		$	32.95
Additional market plus service condition RSUs vested							6,269
RSUs added through dividend credits		939					—
RSUs released		(28,397	)				(18,805	)
RSUs forfeited/expired		(11	)				—
Outstanding at September 30, 2017		70,650					52,829