Common Stock And Stock-Based Awards Plans (Tables)

12 Months Ended

Dec. 31, 2018

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

Summary Of Stock Options

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

				Weighted-
			Weighted-	Average
			Average	Remaining	Aggregate
		Number of	Exercise	Contractual	Intrinsic
(in thousands, except per share data)		Options	Price	Term (Years)		Value
	Outstanding as of December 31, 2015	2,580	$ 20.49
	Exercised	(928)	20.29
	Forfeited or expired	(455)	23.49
	Outstanding as of December 31, 2016	1,197	19.51
	Exercised	(582)	19.28
	Forfeited or expired	(19)	19.76
	Outstanding as of December 31, 2017	596	19.72
	Exercised	(200)	18.21
	Forfeited or expired	(22)	22.99
	Outstanding as of December 31, 2018	374	$ 20.35	4.37	$	680
	Exercisable as of December 31, 2018	340	$ 20.07	3.44	$	680

Restricted Stock Units (RSUs) [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 time-based restricted stock units:

			Weighted-
			Average
		Number of	Grant Date
(in thousands, except per share data)		Units	Fair Value
	Non-vested awards outstanding as of December 31, 2015	467	$ 21.59
	Granted	392	22.71
	Vested	(209)	21.07
	Forfeited	(125)	21.85
	Non-vested awards outstanding as of December 31, 2016	525	22.57
	Granted	314	31.56
	Vested	(206)	21.84
	Forfeited	(40)	24.21
	Non-vested awards outstanding as of December 31, 2017	593	27.47
	Granted	407	29.44
	Vested	(306)	27.25
	Forfeited	(99)	27.52
	Non-vested awards outstanding as of December 31, 2018	595	$ 28.93

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-
			Average
		Number of	Grant Date
(in thousands, except per share data)		Units	Fair Value
	Non-vested units outstanding as of December 31, 2015	306	$ 19.77
	Granted(1)	184	21.63
	Forfeited	(263)	19.64
	Non-vested units outstanding as of December 31, 2016	227	21.43
	Granted(1)	172	31.60
	Forfeited	(53)	18.81
	Non-vested units outstanding as of December 31, 2017	346	26.88
	Granted(1)	120	29.60
	Forfeited	(147)	24.06
	Non-vested units outstanding as of December 31, 2018	319	$ 29.19

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