Equity Incentive Plans (Tables)

6 Months Ended

Jun. 30, 2019

Share-based Payment Arrangement, Noncash Expense [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, 2018	234,875		$	19.02	—	$	76.63	$	51.98
Exercised	(117,013	)	19.02		—	61.79		48.59
Granted	1,941		73.84		—	73.84		73.84
Outstanding at June 30, 2019	119,803		$	44.62	—	$	76.63	$	55.65

Summary Of Outstanding Options

The following table summarizes outstanding options at June 30, 2019:

Exercise price range	Options outstanding	Weighted avg. life remaining	Weighted avg. exercise price		Aggregate intrinsic value (in thousands)
$ 44.62 - 49.99	31,673	2.6
50.00 - 59.99	32,268	5.0
60.00 - 69.99	51,706	5.6
70.00 - 76.63	4,156	8.6
	119,803	4.8	$	55.65	$	2,274

Summary Of Exercisable Options

The following table summarizes exercisable options at June 30, 2019:

Exercise price range	Options outstanding	Weighted avg. life remaining	Weighted avg. exercise price		Aggregate intrinsic value (in thousands)
$ 44.62 - 49.99	31,673	2.6
50.00 - 59.99	29,392	4.6
60.00 - 69.99	51,706	5.6
70.00 - 76.63	1,108	7.7
	113,879	4.5	$	55.10	$	2,221

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, 2018	655,056		$	64.16
Granted	208,755		74.13
Vested	(337,910	)	64.61
Forfeited	(8,328	)	66.38
Outstanding at June 30, 2019	517,573		$	67.86	1.36

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, 2018	23,571		$	61.25
Granted	27,392		77.19
Vested	(24,727	)	61.62
Outstanding at June 30, 2019	26,236		$	77.54	0.92