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Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2016

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

Summary of Option Activity

A summary of option activity under our 1998 Stock Option Plan as of December 31, 2015, and changes during the three months ended March 31, 2016 is presented below.

	Number  of Stock Options			Weighted Average Exercise  Price				Weighted Average Remaining Contractual Life (years)		Aggregate Intrinsic Value (in thousands)
Outstanding, December 31, 2015	414,769			$	19.07			5.08		$	1,814
Exercised	(22,750	)		15.46						137
Outstanding, March 31, 2016	392,019			$	19.28			5.01		$	1,468
Exercisable, March 31, 2016	336,187			$	18.22			4.40		$	1,468

Summary of Stock Options Outstanding

The following table summarizes information about our stock options outstanding at March 31, 2016:

Range of Exercise Prices	Options Outstanding									Options Exercisable
	Shares			Weighted Average Remaining Contractual Life (years)		Weighted Average Exercise Price				Shares			Weighted Average Exercise Price
$0.01-15.70	79,852			3.42		$	10.67			79,852			$	10.67
$15.71-17.81	85,750			3.49		17.55				85,750			17.55
$17.82-20.48	118,917			4.00		19.59				118,917			19.59
$20.49-33.36	107,500			8.50		26.72				51,668			27.85
	392,019			5.01		$	19.28			336,187			$	18.22

Status of Unvested Stock Options

The summary of the status of our unvested stock options as of December 31, 2015 and changes during the three months ended March 31, 2016 is presented below.

Unvested stock options:	Shares			Weighted Average Grant Date Fair Value Per Share
Unvested at December 31, 2015	101,836			$	12.67
Vested	(46,004	)		12.55
Unvested at March 31, 2016	55,832			$	12.77

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- Definition

Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Tabular disclosure of the change in stock options.

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