Stock-Based Compensation

3 Months Ended

Mar. 31, 2015

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

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



			Non-Vested Stock Awards/Stock Units Outstanding			Stock Options Outstanding
	Shares Available for Grant	Director Deferred Stock Units Outstanding	Number of Shares	Weighted- Average Grant-Date Fair Value		Number of Shares		Weighted- Average Exercise Price
Balance, January 1, 2015	1,973,427	38,867	175,490	$	60.55	5,029,882		$	58.99
Authorized	—	—	—	—		—		—
Granted	—	—	—	—		—		—
Stock options exercised	—	—	—	—		(14,350	)	50.74
Stock awards vested	—	—	—	—		—		—
Forfeited	5,191	—	—	—		(5,191	)	65.97
Canceled/expired	—	—	—	—		(193	)	71.39
Balance, March 31, 2015	1,978,618	38,867	175,490	$	60.55	5,010,148		$	59.00

Shares issued in connection with stock compensation awards are issued from available treasury shares. If no treasury shares are available, new shares are issued from available authorized shares. Shares issued in connection with stock compensation awards along with other related information were as follows:



	Three Months Ended March 31,
	2015		2014
New shares issued from available authorized shares	—		—
Issued from available treasury stock	14,350		329,825
Total	14,350		329,825

Proceeds from stock option exercises	$	728	$	17,279

Stock-based compensation expense is recognized ratably over the requisite service period for all awards. The service period generally matches the vesting period for most awards; however, the service period for certain executive officers does not extend past the date they reach 65 years of age. Stock-based compensation expense was as follows:



	Three Months Ended March 31,
	2015		2014
Stock options	$	2,166	$	1,770
Non-vested stock awards/stock units	396		366
Deferred stock units	—		—
Total	$	2,562	$	2,136

Unrecognized stock-based compensation expense at March 31, 2015 was as follows:



Stock options	$	19,832
Non-vested stock awards/stock units	2,042
Total	$	21,874

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

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