Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2019

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Unrecognized Compensation Cost And Remaining Weighted-Average Amortization Stock-Based Awards

As ofMarch 31,2019, the unrecognized compensation cost and remaining weighted-average amortization period related to stock-based awards were as follows:

		Performance-
	Time-based	based
	Restricted	Restricted
	Stock	Stock
(in thousands, except remaining period data)	Units	Units(1)
Unrecognized compensation cost	$ 25,211	$ 6,964
Remaining weighted-average
amortization period	3.2 years	2.1 years
(1) Based on the probable achievement of the performance goals identified in each award.

Summary Of Stock Options

The following table summarizes activities relating to the Company’s stock options:

			Weighted-
		Weighted-	Average	Aggregate
	Number of	Average	Remaining	Intrinsic
	Options	Exercise	Contractual	Value
	(in thousands)	Price	Term (Years)	(in thousands)
Outstanding as of December 31, 2018	374	$20.35
Exercised	(13)	21.82
Outstanding as of March 31, 2019	361	$20.29	4.10	$ 2,150
Exercisable as of March 31, 2019	361	$20.29	4.10	$ 2,150

Restricted Stock Units (RSUs) [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary Of Stock-Based Awards

As of March 31,2019 and December 31, 2018, the Company had no restricted shares outstanding.Restricted stock units, time-based and performance-based, remain outstanding as detailed below.

The following table summarizes the activities related to the Company’s time-based restricted stock units:

		Weighted-
	Number of	Average
	Units	Grant Date
	(in thousands)	Fair Value
Non-vested awards outstanding as of December 31, 2018	595	$28.93
Granted	537	27.63
Vested	(170)	27.70
Forfeited	(18)	30.42
Non-vested awards outstanding as of March 31, 2019	944	$28.38

Performance-Based Restricted Stock Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary Of Stock-Based Awards

The following table summarizes the activities related to the Company’s performance-based restricted stock units:

		Weighted-
	Number of	Average
	Units	Grant Date
	(in thousands)	Fair Value
Non-vested awards outstanding as of December 31, 2018	319	$29.19
Granted (1)	188	27.51
Vested	(57)	31.40
Forfeited	(74)	21.01
Non-vested awards outstanding as of March 31, 2019	376	$28.96

⁽¹⁾Represents target number of units that can vest based on the achievement of the performance goals.