Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Fair Value Assumptions for Stock Options

The following are the weighted-average assumptions used to calculate the grant-date fair values of stock option awards granted in the years ended December 31, 2015, 2014 and 2013:

	For the Years Ended December 31
	2015	2014	2013
Expected dividend yield	1.53%	1.77%	2.01%
Expected volatility	40.32%	42.04%	42.48%
Expected term	7.3 years	7.3 years	7.4 years
Risk-free interest rate	1.96%	2.18%	1.53%

Summary of Stock Option Activity

A summary of stock option activity for the year ended December 31, 2015 is presented below:

	Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term		Aggregate IntrinsicValue ($000)
Options
Outstanding at January 1, 2015		480,736		$	34.35
Granted		84,672			41.21
Exercised		(45,289	)		17.16
Forfeited		(13,035	)		52.25
Outstanding at December 31, 2015		507,084			36.57		4.53	$	6,654
Vested or expected to vest at December 31, 2015		506,473			36.56		4.52		6,649
Exercisable at December 31, 2015		381,257			32.59		3.14		6,518

Summary of Stock Award Activity

A summary of stock award activity for the year ended December 31, 2015, is presented below:

	Shares			Weighted-Average Grant Date Fair Value
Unvested Stock Awards
Unvested at January 1, 2015		183,010		$	57.92
Granted		141,000			39.11
Vested		(15,088	)		33.14
Forfeited		(100,419	)		58.84
Unvested at December 31, 2015		208,503			46.55

Summary of SARs Activity

The following is a summary of SARs activity for the year ended December 31, 2015:

	Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term		Aggregate Intrinsic Value ($000)
SARs
Outstanding at January 1, 2015		231,182		$	57.94
Granted		187,527			41.23
Forfeited		(28,754	)		52.67
Outstanding at December 31, 2015		389,955			50.30		8.16	$	(236	)