Equity Incentive Plans (Tables)

3 Months Ended

Mar. 31, 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	(17,391	)	46.86		—	61.79		52.71
Granted	2,215		76.63		—	76.63		76.63
Forfeited/Expired	(939	)	60.03		—	60.03		60.03
Outstanding at March 31, 2017	269,871		$	19.02	—	$	76.63	$	52.06

Summary Of Outstanding Options

The following table summarizes outstanding options at March 31, 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	2.1
20.00 - 29.99	—	—
30.00 - 39.99	1,428	2.8
40.00 - 49.99	87,289	4.8
50.00 - 59.99	80,917	6.4
60.00 - 69.99	86,925	7.4
70.00 - 76.63	2,215	9.9
	269,871	6.1	$	52.06	$	5,828

Summary Of Exercisable Options

The following table summarizes exercisable options at March 31, 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	2.1
20.00 - 29.99	—	—
30.00 - 39.99	1,428	2.8
40.00 - 49.99	87,289	4.8
50.00 - 59.99	54,242	6.2
60.00 - 69.99	43,998	7.0
70.00 - 76.63	—	—
	198,054	5.5	$	49.67	$	4,746

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	283,154		76.63
Vested	(208,822	)	57.43
Outstanding at March 31, 2017	608,649		$	67.94	1.70

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	—	—
Vested	—	—
Outstanding at March 31, 2017	15,805	$	70.93	0.11