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Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

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

The following table summarizes the Company's SARs activity during 2018:



(Shares in thousands)	Number of SARs		Weighted- average Exercise Price Per Share		Aggregate Intrinsic Value (thousands)		Weighted- average Remaining Term (Years)
Outstanding at December 31, 2017	616		$	30.97
Granted	65		50.35
Exercised	(277	)	33.03
Cancelled	(25	)	27.58
Outstanding at December 31, 2018	379		33.01		$	4,894	4.5
Vested and expected to vest as of December 31, 2018	379		33.01		4,894		4.5
Exercisable at December 31, 2018	60		34.10		659		3.0

Schedule of Share-based Compensation, Performance Based Restricted Stock Unit Activity [Table Text Block]

The following table summarizes the activity related to equity-based, performance-based restricted stock units during 2018:



(Shares in thousands)	Number of Shares		Weighted- average Grant Date Fair Value
Outstanding at December 31, 2017	223		$	28.49
Granted	55		62.44
Vested	(75	)	33.31
Forfeited	(1	)	62.44
Outstanding at December 31, 2018	202		$	35.76

SARs/Stock Options Nonvested Share Activity

A summary of the status and changes of shares subject to SARs and the related average price per share follows:



(Shares in thousands)	Number of SARs		Weighted- average Grant Date Fair Value
Nonvested as of December 31, 2017	426		$	10.54
Granted	65		15.73
Vested	(147	)	13.11
Cancelled	(25	)	8.73
Nonvested as of December 31, 2018	319		$	10.33

SARS/Stock Options, Valuation Assumptions [Table Text Block]

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



	2018		2017		2016
Risk-free interest rate	2.58	%	1.92	%	1.25	%
Dividend yield	0.8	%	1.1	%	1.4	%
Volatility	31.9	%	34.0	%	38.0	%
Expected lives (in years)	5.5		5.6		5.7

Summary of restricted stock activity

The following table summarizes the stock-settled restricted stock unit activity during 2018:



(Shares in thousands)	Number of Shares		Weighted- average Grant Date Fair Value
Outstanding at December 31, 2017	119		$	32.16
Granted	59		50.35
Vested	(38	)	36.69
Forfeited	(10	)	34.07
Outstanding at December 31, 2018	130		$	38.99

Summary of stock activity for the directors deferred compensation plan

The following table summarizes the stock activity for the directors' deferred compensation plan during 2018:



(Shares in thousands)	Number of Shares		Weighted- average Grant Date Fair Value
Outstanding at December 31, 2017	164		$	25.96
Granted	12		53.11
Distributed	(24	)	54.71
Outstanding at December 31, 2018	152		$	23.55

- Definition

Tabular disclosure of an equity-based arrangement (such as stock or unit options and stock or unit awards) with an individual employee, which is generally an employment contract between the entity and a selected officer or key employee containing a promise by the employer to pay certain equity-based awards at future dates, sometimes including a period after retirement, upon compliance with stipulated requirements. This type of arrangement is distinguished from broader based employee benefit plans as it is usually tailored to the employee. Disclosure also typically includes the amount of related compensation expense recognized during the reporting period, the number of shares or units issued during the period under such arrangements, and the carrying amount as of the balance sheet date of the related liability.

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