Basis of Presentation (Tables)

3 Months Ended

Mar. 31, 2012

Basis of Presentation

Reconciliation of basic earnings per share ("EPS") to diluted EPS

	Three Months Ended
	March 31,
	2012		2011
Net income available to common stockholders	$	7,201	$	7,078
Basic weighted average shares outstanding	48,273		50,107
Dilutive effect of potential common stock equivalents — stock options	64		58
Diluted weighted average shares outstanding	48,337		50,165
Earnings per common share:
Basic	$	0.15	$	0.14
Diluted	$	0.15	$	0.14
Potentially dilutive securities excluded from earnings per diluted share because their effect is anti-dilutive	1,347		1,743

Stock option and restricted stock unit activity of the entity

	Three Months Ended
	March 31,
	2012			2011
Stock-based compensation expense recognized in operating expenses	$	3,068		$	1,449
Tax benefit of stock-based compensation expense in provision for income taxes	1,066			522
Stock-based compensation expense, net of tax	$	2,002		$	927
Fair value of shares vested	$	3,110		$	1,281
Proceeds to the Company from the exercise of stock-based compensation	$	1,758		$	154
Tax effect from exercise of stock-based compensation, including shortfall tax benefits	$	(2	)	$	(39	)

	At March 31,
	2012		2011
Stock-based compensation cost capitalized in inventory	$	387	$	115

Schedule of effective tax rates and income tax expense

	Three Months Ended
	March 31,
	2012			2011
Effective tax rate	46.9		%	42.6		%
Provision for income taxes	$	6,372		$	5,263