Equity-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2017

Employee Stock-Based Compensation Expense

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
Expense from Time-based RSUs	$	615	$	545	$	1,142	$	1,311
Expense from Performance-based RSUs		117		-		151		-
Equity-based compensation expense		732		545		1,293		1,311
Tax benefit from equity-based compensation		(161)		(120)		(284)		(288)
Excess tax benefit from equity-based compensation		(117)		(201)		(324)		(201)
Net compensation cost	$	454	$	224	$	685	$	822

Time-based Restricted Stock Units

Restricted Stock Units

	Time-based restricted stock units		Weighted average grant date fair value per share
Balance, January 1, 2017	127,011	$	33.00
Granted	43,450	$	55.45
Shares vested (including tax withholding)(a)	(58,426)	$	33.03
Forfeited	(2,935)	$	40.70
Balance, June 30, 2017	109,100	$	41.71

(a)    Pursuant to the terms of the 2013 Incentive Plan, RSUs withheld by the Company for the payment of the employee's tax withholding related to an RSU vesting are added back to the pool of shares available for future awards.

Performance-based Restricted Stock Units

Restricted Stock Units

The following table summarizes equity-based compensation activity related to performance-based RSUs as of and for the six months ended June 30, 2017: 

	Performance-based restricted stock units		Weighted average grant date fair value per share
Balance, January 1, 2017	—	$	—
Granted (a)	33,961	$	57.88
Shares vested (including tax withholding)	—	$	—
Forfeited	(1,155)	$	57.88
Balance, June 30, 2017	32,806	$	57.88

(a)    Represents the total participant target award.