Common Stock and Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

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

Reconciliation of the changes in the number of shares of common stock issued

A reconciliation of the changes in the number of common shares issued is as follows:

(Thousands)	Number of Shares
Issued as of January 1, 2012	27,024
Exercise of stock options and stock appreciation rights (SARs)	26
Issued as of December 31, 2012	27,050
Exercise of stock options and SARs	114
Issued as of December 31, 2013	27,164
Exercise of stock options and SARs	62
Issued as of December 31, 2014	27,226

Summary of company's stock option activity

The following table summarizes the Company’s stock option activity during 2014:

(Shares in thousands)	Number of Options		Weighted- average Exercise Price Per Share		Aggregate Intrinsic Value		Weighted- average Remaining Term (Years)
Outstanding at December 31, 2013	21		$	17.29	$	—	—
Exercised	(20	)	17.29		—		—
Canceled	(1	)	17.08		—		—
Outstanding at December 31, 2014	—				—		—
Vested and expected to vest as of December 31, 2014	—				—		—
Exercisable at December 31, 2014	—				—		—

Summary of restricted stock activity

The following table summarizes the restricted stock activity during 2014:

(Shares in thousands)	Number of Shares		Weighted- average Grant Date Fair Value
Outstanding at December 31, 2013	200		$	32.71
Granted	60		33.29
Vested	(81	)	33.21
Forfeited	(27	)	33.21
Outstanding at December 31, 2014	152		$	30.76

Summary of stock activity for the directors deferred compensation plan

The following table summarizes the stock activity for the directors' deferred compensation plan during 2014:

(Shares in thousands)	Number of Shares	Weighted- average Grant  Date Fair Value
Outstanding at December 31, 2013	101	$	23.74
Granted	19	33.46
Outstanding at December 31, 2014	120	$	25.33

Summary of Company's SARs activity

The following table summarizes the Company's SARs activity during 2014:

(Shares in thousands)	Number of SARs		Weighted- average Exercise Price Per Share		Aggregate Intrinsic Value		Weighted- average Remaining Term (Years)
Outstanding at December 31, 2013	984		$	26.34	$	—	—
Granted	143		33.29		—		—
Exercised	(154	)	20.15		—		—
Cancelled	(5	)	33.30		—		—
Outstanding at December 31, 2014	968		28.32		7,633,000		4.4
Vested and expected to vest as of December 31, 2014	968		28.32		7,633,000		4.4
Exercisable at December 31, 2014	504		26.51		5,334,000		3.6

Summary of information on SARs outstanding

Summarized information on SARs outstanding as of December 31, 2014 follows:

SARs Prices	Number Outstanding (Thousands)	Weighted- average Remaining Life (Years)	Weighted- average Exercise Price
$15.01	162	3.7	$	15.01
$21.24-$24.03	140	4.4	21.40
$27.78-$29.45	337	4.5	28.90
$33.30-$34.70	146	6.3	33.32
$39.30-$44.72	183	3.1	40.41
	968	4.4	$	28.32

Fair value of SARs using Black-Scholes pricing model

The fair value of the SARs was estimated on the grant date using the Black-Scholes pricing model with the following assumptions:

	2014		2013		2012
Risk-free interest rate	1.64	%	0.70	%	0.89	%
Dividend yield	1.0	%	1.1	%	—	%
Volatility	45.5	%	56.6	%	50.0	%
Expected lives (in years)	5.0		5.0		5.0