Stock-Based Compensation (Tables)

12 Months Ended

Jan. 31, 2012

Stock-Based Compensation [Abstract]

Amount of stock-based compensation costs and related deferred income tax benefit recognized in the financial statements

The amount of stock-based compensation costs and related deferred income tax benefit recognized in the financial statements are as follows:

	Years Ended January 31,
	2012		2011		2010
	(in thousands)
Stock option costs	$	2,606	$	6,085	$	8,472
Restricted stock costs		9,979		8,846		8,266
Total stock-based compensation costs		12,585		14,931		16,738
Less amount capitalized into qualifying real estate projects		(4,935)		(6,962)		(9,229)
Amount charged to operating expenses		7,650		7,969		7,509
Depreciation expense on capitalized stock-based compensation		1,246		602		417
Total stock-based compensation expense	$	8,896	$	8,571	$	7,926
Deferred income tax benefit	$	3,184	$	2,935	$	2,666

Weighted average assumptions used for options granted

The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions used for options granted during the respective years.

	Years Ended January 31,
	2012			2011			2010
Risk-free interest rate		2.61	%		2.79	%		2.02	%
Expected volatility		72.40	%		71.51	%		65.90	%
Expected dividend yield		0.00	%		0.00	%		0.00	%
Expected term (in years)		5.50			5.50			5.50

Activity of stock options

The following table provides a summary of stock option activity for the year ended January 31, 2012:

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Intrinsic Value (in thousands)
Outstanding at January 31, 2011		4,126,678		$	36.76
Granted		473,519		$	17.72
Exercised		(15,807	)	$	12.22
Forfeited/expired		(162,147	)	$	44.54
Outstanding at January 31, 2012		4,422,243		$	34.53		5.10	$	1,480
Options exercisable (fully vested) at January 31, 2012		3,189,378		$	40.79		3.91	$	520

Summary of restricted stock activity

The following table provides a summary of restricted stock activity for the year ended January 31, 2012:

	Shares			Weighted Average Grant-Date Fair Value
Unvested shares at January 31, 2011		1,570,138		$	17.16
Granted		730,554		$	17.72
Vested		(343,125	)	$	24.78
Forfeited		(62,542	)	$	16.57
Unvested shares at January 31, 2012		1,895,025		$	16.02