Share-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2012

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

Assumptions to estimate fair value of stock options and SAR's

The following table sets forth the weighted average fair value of stock options on the date of grant and the weighted average fair value of the SARs at December 31, 2012. The assumptions used to estimate the fair value of the stock options and SARs using the Black-Scholes option valuation model are as follows:

	Date of Grant						As of December 31, 2012
	Stock Options 2012			Stock Options 2011			SARs 2010
Weighted average fair value of stock options granted and SARs outstanding	$	15.77		$	17.85		$	13.73
Expected volatility	70.56		%	72.56		%	51.57		%
Expected life	5.5 years			6 years			2.7 years
Risk-free interest rate	0.89		%	2.30		%	0.34		%
Expected dividend yield	—			—			—

Summary of stock option and SAR's activity

The following table summarizes stock option and SARs activity for the years ended December 31, 2012, 2011 and 2010:

	Stock Options				SARs
	Shares		Weighted Average Exercise		Shares		Weighted Average Exercise
Stock options outstanding at December 31, 2009	392,678		$	23.48	112,471		$	10.00
Granted	4,089		15.30		151,287		15.40
Exercised	(29,104	)	9.81		(16,639	)	10.00
Canceled/Forfeited	(36,823	)	23.31		(16,556	)	11.17
Stock options outstanding at December 31, 2010	330,840		24.60		230,563		13.46
Granted	139,916		27.39		—		—
Exercised	(129,785	)	11.41		(119,801	)	13.10
Canceled/forfeited	(19,364	)	40.16		(3,123	)	14.46
Stock options outstanding at December 31, 2011	321,607		30.20		107,639		13.83
Granted	151,102		26.97		—		—
Exercised	(40,173	)	11.84		(34,385	)	12.73
Canceled/forfeited/expired	(62,536	)	29.22		(4,389	)	15.40
Stock options outstanding at December 31, 2012	370,000		$	31.04	68,865		$	14.27

Exercise Price Range

Options to purchase 218,369 shares were exercisable at December 31, 2012 at a weighted average exercise price of $34.00.

	Options Outstanding				Options Exercisable
Range of Exercise Price	Number Outstanding	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Number Exercisable	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)
$ 0.00-$10.00	27,853	$	10.00	6.09	27,853	$	10.00	6.09
$10.00-$20.00	15,892	$	18.06	8.89	2,726	$	15.30	7.59
$20.00-$30.00	227,154	$	27.28	6.60	90,397	$	27.00	3.31
$30.00-$40.00	49,673	$	39.12	2.39	47,965	$	39.28	2.18
$40.00-$50.00	20,464	$	48.50	2.91	20,464	$	48.50	2.91
$50.00-$60.00	12,937	$	51.40	2.23	12,937	$	51.40	2.23
$60.00-$70.00	3,219	$	66.60	1.02	3,219	$	66.60	1.02
$70.00-$80.00	12,808	$	70.90	1.14	12,808	$	70.90	1.14

Summary of restricted stock and restricted stock units activity

The following table summarizes restricted stock and restricted stock units activity for the years ended December 31, 2012, 2011 and 2010:

	Restricted Stock				Restricted Stock Units
	Number of Shares		Weighted Average Grant Date Fair Value		Number of Units		Weighted Average Fair Value
Outstanding at December 31, 2009	134,389		$	15.95	67,485		$	18.06
Granted	2,363		15.30		91,378		15.40
Vested	(57,926	)	21.90		(22,500	)	15.24
Cancelled/Forfeited	(14,203	)	12.43		(9,947	)	15.76
Outstanding at December 31, 2010	64,623		11.37		126,416		27.32
Granted	205,463		27.37		—		—
Vested	(85,323	)	19.36		(79,014	)	27.87
Cancelled/Forfeited	(11,254	)	26.89		(1,884	)	25.03
Outstanding at December 31, 2011	173,509		25.38		45,518		24.14
Granted	230,096		26.40		—		—
Vested	(95,336	)	23.15		(31,456	)	25.92
Cancelled/Forfeited	(68,571	)	27.43		(2,651	)	24.60
Outstanding at December 31, 2012	239,698		$	26.65	11,411		$	24.60

Summary of performance shares and performance unit activity

The following table summarizes performance shares and performance units’ activity for the years-ended December 31, 2012, 2011, and 2010:

	Performance Shares				Performance Units
	Number of Shares		Weighted Average Grant Date Fair Value		Number of Units		Weighted Average Fair Value
Outstanding at December 31, 2009	136,298		$	16.59	67,485		$	27.53
Granted	2,363		18.65		91,378		19.94
Vested	—		—		—		—
Cancelled/Forfeited	(37,833	)	17.53		(13,840	)	20.12
Outstanding at December 31, 2010	100,828		16.29		145,023		35.41
Granted	81,489		42.72		—		—
Vested	(56,830	)	23.24		(57,948	)	24.68
Cancelled/Forfeited	(19,558	)	48.62		(2,536	)	25.03
Outstanding at December 31, 2011	105,929		26.92		84,539		39.78
Granted	145,508		25.78		32,498		—
Vested	(111,703	)	7.96		(74,845	)	31.17
Cancelled/Forfeited	(30,575	)	42.11		(7,953	)	49.20
Outstanding at December 31, 2012	109,159		$	40.55	34,239		$	49.20