Share-Based Arrangements (Tables)

12 Months Ended

Dec. 31, 2016

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

Schedule of share-based compensation, stock options, activity

Stock option activity is as follows:

	Options		Weighted average- exercise price
Options outstanding at December 31, 2015	1,040,036		$	33.22
Granted	230,197		42.86
Exercised	(272,411	)	30.04
Forfeited or expired	(39,143	)	39.32
Options outstanding at December 31, 2016	958,679		$	36.18

Schedule of share-based compensation arrangement by share-based payment award, options, vested and expected to vest, outstanding

The following table presents information regarding options outstanding as of December 31, 2016:

Weighted-average remaining contractual term - options outstanding (years)	6.2
Aggregate intrinsic value - options outstanding (in thousands)	$	12,219
Weighted-average exercise price - options outstanding	$	36.18
Options exercisable	425,307
Weighted-average remaining contractual term - options exercisable (years)	4.2
Aggregate intrinsic value - options exercisable (in thousands)	$	7,587
Weighted-average exercise price - options exercisable	$	31.09

Schedule of share-based payment award, stock options, valuation assumptions

The fair value of each option award is estimated on the date of grant using the Black-Scholes option valuation model. The following table indicates the weighted-average assumptions used in estimating fair value:

	2016			2015			2014
Expected option term (years)	5.2			5.1			5.1
Expected volatility	26.0		%	29.0		%	37.5		%
Risk-free interest rate	1.2		%	1.6		%	1.5		%
Expected dividend yield	1.8		%	1.6		%	1.7		%
Per share fair value of options granted	$	8.63		$	9.28		$	11.60

Schedule of share-based compensation, restricted stock and restricted stock units activity

Restricted Stock Award and Restricted Stock Unit activity is as follows:

	Restricted Stock Awards		Weighted- average grant date fair value
Restricted Stock outstanding at December 31, 2015	183,543		$	37.80
Granted	82,519		42.73
Vested	(87,424	)	37.94
Forfeited or expired	(10,964	)	39.71
Restricted Stock outstanding at December 31, 2016	167,674		$	40.27