Stock Compensation Plans

9 Months Ended

Sep. 30, 2011

Stock Compensation Plans [Abstract]

Stock Compensation Plans

15. Stock Compensation Plans

The Company currently has two stock compensation plans. The 1996 Nonemployee Director Stock Option Plan and the 2000 Incentive Stock Compensation Plan provide for the granting of stock options to officers, employees and non-employee directors at an exercise price equal to the fair market value of the stock at the date of grant. The 2000 Incentive Stock Compensation Plan also provides for other forms of stock-based compensation such as restricted stock, but none have been granted to date. Options granted to employees vest over two to four years and are exercisable up to ten years from the grant date. Upon retirement, any unvested options become exercisable immediately. Options granted to directors vest at the grant date and are exercisable up to ten years from the grant date.

The following table is a summary of the stock-based compensation expense recognized for the three and nine months ended September 30, 2011 and 2010 (in thousands of dollars):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2011			2010			2011			2010
Stock-based compensation expense	$	115		$	482		$	2,987		$	2,406
Tax benefit		(43	)		(178	)		(1,105	)		(890	)
Stock-based compensation expense, net of tax	$	72		$	304		$	1,882		$	1,516

The fair value of each option grant during the first nine months of 2011 and 2010 was estimated on the date of grant using the Black-Scholes option-pricing model, based on the following assumptions:

	2011			2010
Expected dividend yield		.60% - .80	%		1.25% - 1.60	%
Expected stock price volatility		40.5% - 57.9	%		51.3% - 57.0	%
Risk free interest rate		.28% - 2.39	%		1.37% - 2.96	%
Expected life options		2 - 5 years			3 - 6 years
Weighted-average fair value per share at grant date	$	27.41		$	27.79

The expected life of options was determined based on the exercise history of employees and directors since the inception of the plans. The expected stock price volatility is based upon the historical weekly and daily stock price for the prior number of years equivalent to the expected life of the stock option. The expected dividend yield was based on the dividend yield of the Company's common stock at the date of the grant. The risk free interest rate was based upon the yield of U.S. Treasuries, the terms of which were equivalent to the expected life of the stock option.

A summary of stock option activity under the plans during the nine months ended September 30, 2011, is presented below:

						Weighted-
				Weighted-		Average		Aggregate
				Average		Remaining		Intrinsic
				Exercise		Contractual		Value
Options	Shares			Price		Term		($000's)
Outstanding at January 1, 2011		1,321,637		$	33.26
Granted		139,000			73.97
Exercised		(161,664	)		26.63
Forfeited or expired		(58,625	)		38.16
Outstanding at September 30, 2011		1,240,348		$	38.44	7.7	$	21,180
Exercisable at September 30, 2011		468,049		$	33.31	6.5	$	10,391

As of September 30, 2011, there was $6.4 million of total unrecognized compensation expense related to non-vested stock options. That cost is expected to be recognized over a weighted-average period of 2.3 years. The intrinsic value of stock options exercised in the first nine months of 2011 was $8.3 million.