Stock-Based Compensation (Tables)

6 Months Ended

Jun. 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	—		—	—		—	—		(67,075	)	53.46
Stock awards/units vested	—		—	—		—	—		—		—
Forfeited/expired	39,192		—	—		—	—		(39,192	)	70.84
Balance, June 30, 2016	1,620,703		53,659	$	61.48	173,180	$	66.05	5,505,973		$	60.31

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



	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
New shares issued from available authorized shares	—		—		—		—
Issued from available treasury stock	65,200		157,124		67,075		171,474
Total	65,200		157,124		67,075		171,474

Proceeds from stock option exercises	$	3,490	$	8,222	$	3,586	$	8,950

Stock-based compensation expense was as follows:



	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Stock options	$	2,117	$	2,028	$	4,242	$	4,194
Non-vested stock awards/stock units	358		267		715		663
Deferred stock units	520		480		520		480
Total	$	2,995	$	2,775	$	5,477	$	5,337

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



Stock options	$	16,517
Non-vested stock awards/stock units	2,640
Total	$	19,157