Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2011

Stock-Based Compensation

Schedule of Stock-Based Compensation Expense and Realized Excess Tax Benefits

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
Selling and administrative expenses	$	1,928		$	1,165		$	4,262		$	3,022
Total stock-based compensation expense included in operating expenses	$	1,928		$	1,165		$	4,262		$	3,022
Income before income taxes		(1,928	)		(1,165	)		(4,262	)		(3,022	)
Provision for income taxes		573			357			1,232			964
Net income	$	(1,355	)	$	(808	)	$	(3,030	)	$	(2,058	)
Net cash provided by operating activities	$	(724	)	$	(414	)	$	(2,237	)	$	(1,903	)
Net cash used in financing activities	$	724		$	414		$	2,237		$	1,903

Schedule of Stock Option Awards

	Shares			Outstanding Weighted- Average Exercise Price (per share)		Aggregate Intrinsic Value		Weighted- Average Remaining Contractual Life
Outstanding at December 31, 2010		863		$	32.69
Granted		179		$	76.34
Exercised		(160	)	$	30.75
Forfeited		(25	)	$	47.01
Expired or canceled		—		$	—
Outstanding at June 30, 2011		857		$	41.65	$	36,346		4.6 years
Exercisable at June 30, 2011		456		$	32.03	$	23,749		3.5 years

Schedule of Other Information about Stock Options

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Weighted-average estimated grant-date fair value of employee stock options granted (per share)	$	28.96			$	28.23
Total pre-tax intrinsic value of stock options exercised	$	2,903	$	1,897	$	7,435	$	8,230
Pre-tax unrecognized compensation expense, net of estimated forfeitures as of June 30, 2011					$	5,115
Weighted-average period (in years) to be recognized as expense						2.1

Schedule of Valuation Assumptions

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
Assumptions:
Risk-free interest rate		1.4	%		1.7	%		1.9	%		2.3	%
Dividend yield		0.2	%		0.5	%		0.3	%		0.5	%
Volatility factor		45			46			44			43
Expected life (in years)		3.8			3.8			4.3			4.7

Schedule of Restricted Share Awards

	Shares			Weighted- Average  Grant- Date Fair Value (per share)
Nonvested at December 31, 2010		161		$	35.13
Granted		43		$	77.81
Vested		(41	)	$	38.08
Forfeited		(9	)	$	39.86
Nonvested at June 30, 2011		154		$	46.09

Schedule of Other Information about Restricted Share Awards

	Six Months Ended June 30,
	2011		2010
Total fair value of awards vested during the period	$	3,035	$	843
Pre-tax unrecognized compensation expense, net of estimated forfeitures as of June 30, 2011	$	3,770
Weighted-average period (in years) to be recognized as expense		2.2