Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2016

A combined summary of activity in our active stock-based compensation plans is presented in the following table.



			Director Deferred Stock Units Outstanding			Non-Vested Stock Awards/Stock Units Outstanding			Stock Options Outstanding
	Shares Available for Grant		Number of Shares	Weighted- Average Grant-Date Fair Value		Number of Shares	Weighted- Average Grant-Date Fair Value		Number of Shares		Weighted- Average Exercise Price
Balance, January 1, 2016	1,589,727		45,443	$	61.16	173,180	$	66.05	5,612,240		$	60.30
Authorized	—		—	—		—	—		—		—
Granted	(8,216	)	8,216	63.25		—	—		—		—
Stock options exercised	—		—	—		—	—		(908,921	)	52.67
Stock awards/units vested	—		—	—		—	—		—		—
Forfeited/expired	41,157		—	—		—	—		(41,157	)	70.98
Balance, September 30, 2016	1,622,668		53,659	$	61.48	173,180	$	66.05	4,662,162		$	61.70

Shares issued in connection with stock compensation awards along with other related information were as follows:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
New shares issued from available authorized shares	—		—		—		—
Issued from available treasury stock	841,846		56,377		908,921		227,851
Total	841,846		56,377		908,921		227,851

Proceeds from stock option exercises	$	44,287	$	2,880	$	47,873	$	11,830

Stock-based compensation expense was as follows:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
Stock options	$	2,163	$	2,075	$	6,405	$	6,269
Non-vested stock awards/stock units	358		267		1,073		930
Deferred stock units	—		—		520		480
Total	$	2,521	$	2,342	$	7,998	$	7,679

Unrecognized stock-based compensation expense at September 30, 2016 was as follows:



Stock options	$	14,354
Non-vested stock awards/stock units	2,282
Total	$	16,636