Equity Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2013

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

Stock-Based Compensation Expense and Related Income Tax Benefit

The stock-based compensation expense and related income tax benefit recognized in our Consolidated Statements of Income in the periods indicated were as follows:

	Year Ended December 31,
	2013			2012			2011
Stock-based compensation expense	$	11,638		$	16,658		$	17,074
Income tax (benefit)	($	4,481	)	($	6,414	)	($	6,574	)

Stock Options Granted, Forfeited, Exercised and Expired

The stock options granted, forfeited, exercised and expired in the period indicated were as follows:

	Year Ended December 31, 2013
				Weighted					Weighted
				Average		Aggregate			Average	Aggregate
	# of			Exercise		Exercise			Remaining	Intrinsic
	Shares			Price		Price			Contractual Term	Value (1)
Outstanding at beginning of period		1,574,604		$	84.90	$	133,691
Granted		156,500		$	19.55		3,059
Forfeited		(16,668	)	$	75.11		(1,252	)
Exercised		0		$	0.00		0
Expired		(381,988	)	$	69.48		(26,543	)
Outstanding at end of period		1,332,448		$	81.77	$	108,955		2.4 years	$	2,198
Exercisable at end of period		1,040,443		$	92.28	$	96,016		2.1 years	$	0

(1) The aggregate intrinsic value of the stock options was calculated by identifying those stock options that had a lower exercise price than the closing market price of our common stock on December 31, 2013 and multiplying the difference between the closing market price of our common stock and the exercise price of each of those stock options by the number of shares subject to those stock options that were outstanding or exercisable, as applicable.

Stock Options Granted and Exercised

The following table sets forth information regarding the stock options granted and exercised in the periods indicated:

	Year Ended December 31,
	2013		2012		2011
Shares subject to stock options granted		156,500		156,500		159,500
Weighted average grant date fair value	$	9.27	$	31.36	$	28.90
Shares subject to stock options exercised		0		202,820		118,410
Intrinsic value of stock options exercised	$	0	$	4,802	$	3,095
Proceeds received from stock options exercised	$	0	$	8,345	$	5,599
Tax benefits realized from stock options exercised	$	0	$	1,602	$	1,190

Assumptions used to Estimate Grant Date Fair Value of Stock Options

The fair value of each stock option grant was estimated on the date of grant using the following assumptions:

	Year Ended December 31,
	2013			2012			2011
Risk-free interest rates		0.7	%		0.7	%		1.8	%
Expected lives (in years)		4.6			4.5			4.7
Volatility		60	%		51	%		48	%
Dividend yield		None			None			None

Number of Restricted Stock Units (RSUs) Granted, Forfeited and Vested

The following table sets forth the number of RSUs that were granted, forfeited and vested in the period indicated:

	Year Ended December 31, 2013
	# of RSUs			Weighted Average Grant Date Fair Value
Unvested at beginning of period		413,645		$	75.35
Granted		522,014		$	19.98
Forfeited		(129,327	)	$	46.72
Vested		(68,488	)	$	88.60
Unvested at end of period		737,844		$	39.96