Equity Incentive Plans (Tables)

6 Months Ended

Jun. 30, 2016

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, 2015	516,305		$	19.02	—	$	65.50	$	48.42
Exercised	(128,027	)	19.41		—	65.50		38.13
Outstanding at June 30, 2016	388,278		$	19.02	—	$	65.50	$	51.81

Summary Of Outstanding Options

The following table summarizes outstanding options at June 30, 2016:

Exercise price range	Options outstanding	Weighted avg. life remaining	Weighted avg. exercise price		Aggregate intrinsic value  (in thousands)
$ 19.02 - 19.99	11,097	2.9
20.00 - 29.99	—	—
30.00 - 39.99	1,428	3.5
40.00 - 49.99	160,251	4.8
50.00 - 59.99	100,820	7.2
60.00 - 65.50	114,682	6.7
	388,278	5.9	$	51.81	$	11,210

Summary Of Exercisable Options

The following table summarizes exercisable options at June 30, 2016:

Exercise price range	Options outstanding	Weighted avg. life  remaining	Weighted avg. exercise price		Aggregate  intrinsic value (in thousands)
$ 19.02 - 19.99	11,097	2.9
20.00 - 29.99	—	—
30.00 - 39.99	1,428	3.5
40.00 - 49.99	145,971	4.6
50.00 - 59.99	48,679	6.9
60.00 - 65.50	48,697	4.0
	255,872	4.8	$	49.48	$	7,982

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, 2015	390,441		$	54.84
Granted	300,752		61.53
Vested	(156,767	)	52.73
Forfeited	—		—
Outstanding at June 30, 2016	534,426		$	59.22	1.52

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, 2015	18,036		$	57.57
Granted	15,805		70.93
Vested	(18,036	)	57.57
Outstanding at June 30, 2016	15,805		$	70.93	0.86