Share-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2017

Share-Based Compensation Amounts Included in Net Income

The table below presents the amounts included in net income related to share-based compensation expense for the awards granted under the SICP for the years ended December 31, 2017, 2016 and 2015:

	For the Year Ended December 31,
	2017			2016			2015
(in thousands)
Awards to non-employee directors	$	540		$	580		$	640
Awards to key employees	1,950			1,787			1,297
Total compensation expense	2,490			2,367			1,937
Less: tax benefit	(1,003		)	(952		)	(780		)
Share-based compensation amounts included in net income	$	1,487		$	1,415		$	1,157

SICP Awards to Non-employee directors

Summary of Stock Activity Non-employee directors

A summary of stock activity for our non-employee directors for the years ended December 31, 2017 and 2016 is presented below:

	Number of Shares		Weighted Average Grant Date Fair Value
Outstanding — December 31, 2015	—		$	—
Granted	8,577		$	62.90
Vested	(8,577	)	$	62.90
Outstanding — December 31, 2016	—		$	—
Granted	7,515		$	71.80
Vested	(7,515	)	$	71.80
Outstanding — December 31, 2017	—		$	—

SICP Awards to Key Employees

Summary of Stock Activity Non-employee directors

The table below presents the summary of the stock activity for awards to key employees:

	Number of Shares		Weighted Average Fair Value
Outstanding — December 31, 2015	110,398		$	38.34
Granted	46,571		$	67.90
Vested	(39,553	)	$	31.79
Expired	(2,325	)	$	42.25
Outstanding — December 31, 2016	115,091		$	51.85
Granted	52,355		$	63.42
Vested	(32,926	)	$	38.88
Expired	(1,878	)	$	39.97
Outstanding — December 31, 2017	132,642		$	53.00