Equity Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2016

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, 2013	840,665		$	18.18	—	$	65.50	$	40.85
Exercised	(35,963	)	32.50		—	52.72		42.63
Granted	172,178		51.64		—	51.64		51.64
Forfeited	(26,666	)	45.20		—	51.64		50.11
Outstanding at December 31, 2014	950,214		$	18.18	—	$	65.50	$	42.48
Exercised	(476,400	)	18.18		—	61.53		37.42
Granted	121,546		61.79		—	61.79		61.79
Forfeited	(79,055	)	45.20		—	65.50		63.88
Outstanding at December 31, 2015	516,305		$	19.02	—	$	65.50	$	48.42
Exercised	(230,319	)	19.41		—	65.50		44.05
Outstanding at December 31, 2016	285,986		$	19.02	—	$	61.79	$	51.93

Schedule of Stock Option Expense to be Recognized in the Future

At December 31, 2016, stock-option expense to be recognized in future periods was as follows (in thousands):



	Amount
Year:
2017	$	692
2018	287
2019	—
2020	—
Total	$	979

Summary Of Outstanding Options

The following table summarizes outstanding options at December 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	2.4
20.00 - 29.99	—	—
30.00 - 39.99	1,428	3.0
40.00 - 49.99	96,122	4.7
50.00 - 59.99	84,934	6.6
60.00 - 61.79	92,405	7.6
	285,986	6.1	$	51.93	$	5,673

Summary Of Exercisable Options

The following table summarizes exercisable options at December 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	2.4
20.00 - 29.99	—	—
30.00 - 39.99	1,428	3.0
40.00 - 49.99	81,842	4.5
50.00 - 59.99	32,793	6.1
60.00 - 61.79	26,420	6.3
	153,580	5.0	$	48.17	$	3,625

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	(156,876	)	52.74
Outstanding at December 31, 2016	534,317		$	59.22	1.01

Nonvested Shares Unamortized Share-based Compensation Expense to be Recognized in the Future

At December 31, 2016, unamortized share-based compensation expense related to nonvested shares was $16.2 million and will be recognized in future periods as follows (in thousands):



	Amount
Year:
2017	$	7,602
2018	5,806
2019	2,814
Total	$	16,222

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	15,805		70.93
Vested	(18,036	)	57.57
Outstanding at December 31, 2016	15,805		$	70.93	0.36