Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2011

Share-Based Compensation [Abstract]

Weighted-average assumptions for options issued during the indicated periods

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
Dividend yield		0	%		0	%		0	%		0	%
Expected volatility		58.6	%		68.4	%		58.8	%		63.0	%
Risk-free interest rate		0.5	%		0.6	%		1.9	%		2.1	%
Expected life of options (in years)		2.0			2.0			3.8			4.3
Weighted-average grant-date fair value	$	12.24		$	11.12		$	19.17		$	12.60

Stock option activity

				Wtd. Avg.
	Shares			Exercise Price
Options outstanding, beginning of period		1,361,779		$	29.67
Options granted		307,394		$	42.56
Options canceled		(67,529	)	$	55.19
Options exercised		(218,313	)	$	22.71
Options outstanding, end of period		1,383,331		$	32.39
Options exercisable, end of period		736,950		$	30.87

Restricted stock activity

				Wtd. Avg.
	Shares			Grant Price
Restricted shares outstanding, beginning of period		734,286		$	22.87
Restricted shares granted		416,800		$	42.29
Restricted shares canceled		(26,558	)	$	30.85
Restricted shares vested		(334,046	)	$	24.69
Restricted shares outstanding, end of period		790,482		$	32.13