Share-Based Compensation

3 Months Ended

Mar. 31, 2013

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

Share-Based Compensation

Share-Based Compensation

The Corporation maintains a share-based compensation plan under which it periodically grants share-based awards, which consist of stock options and restricted stock units, for a fixed number of shares to certain officers of the Corporation. The fair value of share-based awards is recognized as compensation expense over the requisite service or performance period. During the three-month periods ended March 31, 2013 and 2012, share-based compensation expense related to stock options and restricted stock units totaled $0.6 million and $0.3 million, respectively.

During the three-month period ended March 31, 2013, the Corporation granted options to purchase 244,219 shares of common stock and 71,429 restricted stock units to certain officers. At March 31, 2013, there were 674,140 shares of common stock available for future grants under the share-based compensation plan.

Stock Options

A summary of activity for the Corporation’s stock options as of and for the three months ended March 31, 2013 is presented below:

	Non-Vested Stock Options Outstanding						Stock Options Outstanding
	Number of Options		Weighted- Average Exercise Price Per Share		Weighted- Average Grant Date Fair Value Per Share		Number of Options		Weighted- Average Exercise Price Per Share
Outstanding at January 1, 2013	314,765		$	23.03	$	6.92	997,222		$	27.24
Granted	244,219		25.14		7.40		244,219		25.14
Exercised	—		—		—		(5,216	)	21.70
Vested	(95,575	)	23.93		7.19		—		—
Forfeited/expired	(12,311	)	23.43		7.00		(12,311	)	23.43
Outstanding at March 31, 2013	451,098		$	23.97	$	7.12	1,223,914		$	26.89
Exercisable/vested at March 31, 2013							772,816		$	28.59

The weighted-average remaining contractual terms were 6.2 years for all outstanding stock options and 4.4 years for exercisable stock options at March 31, 2013. The intrinsic value of all outstanding in-the-money stock options and exercisable in-the-money stock options was $2.3 million and $1.2 million, respectively, at March 31, 2013. The aggregate intrinsic values of outstanding and exercisable options at March 31, 2013 were calculated based on the closing market price of the Corporation’s common stock on March 31, 2013 of $26.38 per share less the exercise price. Options with intrinsic values less than zero, or “out-of-the-money” options, were not included in the aggregate intrinsic value reported.

At March 31, 2013, unrecognized compensation expense related to stock options totaled $3.0 million and is expected to be recognized over a remaining weighted average period of 2.4 years.

The fair value of the stock options granted during the three months ended March 31, 2013 was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions.

Expected dividend yield	3.50		%
Risk-free interest rate	1.34		%
Expected stock price volatility	42.1		%
Expected life of options – in years	7.0
Weighted average per share fair value	$	7.40

Restricted Stock Units

In addition to stock options, during the three months ended March 31, 2013, the Corporation granted restricted stock performance units and restricted stock service-based units (collectively referred to as restricted stock units) to certain officers. The restricted stock performance units vest based on the Corporation achieving certain performance target levels. The restricted stock performance units are eligible to vest from 0.25x to 1.5x the number of units originally granted depending on which, if any, of the performance target levels are met. However, if the minimum performance target level is not achieved, no shares will become vested or be issued for that respective year’s restricted stock performance units. The restricted stock service-based units vest upon satisfaction of a service condition. Upon achievement of the performance target level and/or satisfaction of a service condition, if applicable, the restricted stock units are converted into shares of the Corporation’s common stock on a one-to-one basis. Compensation expense related to restricted stock units is recognized over the expected requisite performance or service period, as applicable.

A summary of the activity for restricted stock units as of and for the three months ended March 31, 2013 is presented below:

	Number of Units		Weighted- Average Grant Date Fair Value  Per Unit
Outstanding at January 1, 2013	156,510		$	20.83
Granted	71,429		23.41
Converted into shares of common stock	(35,303	)	22.48
Forfeited/expired	(1,754	)	25.97
Outstanding at March 31, 2013	190,882		$	21.44

At March 31, 2013, unrecognized compensation expense related to restricted stock unit awards totaled $3.3 million and is expected to be recognized over a remaining weighted average period of 2.6 years.