Equity Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2017

Share-based Compensation [Abstract]

Summary Of Share Option Activity

A summary of the Company’s share option activity and related information is as follows:

	Number of options		Option price per share					Weighted avg. exercise price
Outstanding at December 31, 2016	285,986		$	19.02	—	$	61.79	$	51.93
Exercised	(28,281	)	46.86		—	61.79		54.72
Granted	2,215		76.63		—	76.63		76.63
Forfeited/Expired	(1,342	)	51.64		—	61.79		59.52
Outstanding at September 30, 2017	258,578		$	19.02	—	$	76.63	$	51.80

Summary Of Outstanding Options

The following table summarizes outstanding options at September 30, 2017:

Exercise price range	Options outstanding	Weighted avg. life remaining	Weighted avg. exercise price		Aggregate intrinsic value  (in thousands)
$ 19.02 - 19.99	11,097	1.6
20.00 - 29.99	—	—
30.00 - 39.99	1,428	2.3
40.00 - 49.99	86,863	4.3
50.00 - 59.99	75,939	6.1
60.00 - 69.99	81,036	7.4
70.00 - 76.63	2,215	9.4
	258,578	5.7	$	51.80	$	4,654

Summary Of Exercisable Options

The following table summarizes exercisable options at September 30, 2017:

Exercise price range	Options outstanding	Weighted avg. life  remaining	Weighted avg. exercise price		Aggregate  intrinsic value (in thousands)
$ 19.02 - 19.99	11,097	1.6
20.00 - 29.99	—	—
30.00 - 39.99	1,428	2.3
40.00 - 49.99	86,863	4.3
50.00 - 59.99	51,276	6.0
60.00 - 69.99	38,375	7.4
70.00 - 76.63	—	—
	189,039	5.2	$	49.28	$	3,868

Summary Of Nonvested Share Activity

A summary of the Company’s nonvested share activity and related information is as follows:

	Number  of shares		Weighted avg. grant  date fair value		Weighted avg. life remaining
Outstanding at December 31, 2016	534,317		$	59.22
Granted	295,754		76.53
Vested	(208,822	)	57.43
Forfeited	(1,342	)	66.88
Outstanding at September 30, 2017	619,907		$	68.07	1.21

Summary Of Restricted Share Unit Activity

A summary of the Company’s restricted share unit activity and related information is as follows:

	Number  of shares		Weighted avg. grant date fair value		Weighted avg. life remaining
Outstanding at December 31, 2016	15,805		$	70.93
Granted	19,030		70.91
Vested	(15,805	)	70.93
Outstanding at September 30, 2017	19,030		$	70.91	0.58