Stock-Based Comp (Tables)

12 Months Ended

Dec. 31, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-based compensation assumptions used in the option valuation models

The assumptions used in the option valuation models are outlined in the following table:

	Year Ended December 31,
	2012			2011			2010
Weighted average grant date fair value per share	$	95.25		$	123.29		$	47.15
Weighted average assumptions used:
Expected volatility	45		%	45		%	45		%
Expected life (in years)	6.47			6.50			6.63
Risk-free interest rate	1.70		%	2.36		%	3.23		%
Expected dividend yield	—		%	—		%	—		%

The assumptions used in the model are outlined in the following table:

	Prior to Re-pricing			After Re-pricing
Weighted average grant date fair value per share	$	21.43		$	36.74
Weighted average assumptions used:
Expected volatility	45		%	45		%
Expected life (in years)	5.97			4.97
Risk free interest rate	3.01		%	2.60		%
Expected dividend yield	—		%	—		%

Stock option activity

The following table summarizes stock option activity during the years ended December 31, 2012, 2011 and 2010 (shares in thousands):

	Year Ended			Year Ended				Year Ended
	December 31, 2012			December 31, 2011				December 31, 2010
	Options	Weighted Average Exercise Price		Options		Weighted Average Exercise Price		Options		Weighted Average Exercise Price
Outstanding at beginning of period	84	$	193.91	91		$	193.13	92		$	392.07
Granted	45	$	258.37	1		$	258.37	91		$	193.13
Exercised	—	$	—	(8	)	$	193.13	—		$	—
Cancelled	—	$	—	—		$	—	(91	)	$	392.09
Forfeited	—	$	—	—		$	—	(1	)	$	389.42
Outstanding at end of period(1)	129	$	216.62	84		$	193.91	91		$	193.13
Options exercisable at end of period(2)	80	$	193.29	76		$	193.13	62		$	193.13
Available for grant at end of period	15			12				13

(1) Stock options outstanding at December 31, 2012 have a weighted average remaining contractual term of 6.2 years.

(2) Exercisable stock options at December 31, 2012 have a weighted average remaining contractual term of 4.4 years.