Equity Incentive Plans (Tables)

3 Months Ended

Mar. 31, 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 shares		Option price per share					Weighted avg. exercise price
Outstanding at December 31, 2015	516,305		$	19.02	—	$	65.50	$	48.42
Exercised	(88,294	)	19.41		—	61.79		30.51
Outstanding at March 31, 2016	428,011		$	19.02	—	$	65.50	$	52.11

Summary Of Outstanding Options

The following table summarizes outstanding options at March 31, 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	3.1
20.00 - 29.99	—	—
30.00 - 39.99	2,625	3.8
40.00 - 49.99	175,166	5.0
50.00 - 59.99	106,275	7.3
60.00 - 65.50	132,848	6.2
	428,011	5.9	$	52.11	$	6,210

Summary Of Exercisable Options

The following table summarizes exercisable options at March 31, 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	3.1
20.00 - 29.99	—	—
30.00 - 39.99	2,625	3.8
40.00 - 49.99	155,636	4.8
50.00 - 59.99	52,259	6.9
60.00 - 65.50	66,863	3.5
	288,480	4.8	$	50.24	$	4,726

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 March 31, 2016	534,426		$	59.22	1.77

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 Average Grant Date Fair Value		Weighted Average Life Remaining
Outstanding at December 31, 2015	18,036	$	57.57
Granted	—	—
Vested	—	—
Outstanding at March 31, 2016	18,036	$	57.57	0.12