Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Share-Based Compensation Expense

The following table summarizes share-based compensation expense:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
(in thousands)	2017			2016			2017			2016
Performance unit incentive plan (“PUP”)	$	3,941		$	1,601		$	7,184		$	2,952
Restricted stock		672			523			2,069			1,597
Restricted stock units		124			86			231			160
Share-based compensation before income tax benefit		4,737			2,210			9,484			4,709
Income tax benefit		(1,752	)		(812	)		(3,524	)		(1,750	)
Share-based compensation, net of income tax benefit	$	2,985		$	1,398		$	5,960		$	2,959

Summary of Activity of the Outstanding Share-Based Compensation Awards

The following table summarizes the activity of the outstanding share-based compensation awards:

	PUP Awards					Restricted Stock					Restricted Stock Units
	Shares			Weighted-Average Grant Date Fair Value		Shares			Weighted-Average Grant Date Fair Value		Shares			Weighted-Average Grant Date Fair Value
Balance at December 31, 2016		255,505		$	26.11		267,051		$	25.96		15,982		$	25.58
Granted		73,557		$	47.44		64,648		$	46.64		2,950		$	47.45
Vested		(76,082	)	$	23.66		(79,104	)	$	24.01		(6,182	)	$	25.05
Forfeited		(5,911	)	$	30.64		(9,807	)	$	33.84		—		$	—
Balance at September 30, 2017		247,069		$	33.10		242,788		$	31.79		12,750		$	30.90