Common Stock And Stock-Based Awards Plans (Tables)

12 Months Ended

Dec. 31, 2017

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, 2014	2,437	$ 20.07
	Granted	289	23.14
	Exercised	(114)	17.39
	Forfeited or expired	(32)	23.40
	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	5.28	$	5,592
	Exercisable as of December 31, 2017	443	$ 18.56	3.65	$	4,667

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, 2014	412	$ 20.33
	Granted	228	23.06
	Vested	(161)	20.51
	Forfeited	(12)	21.03
	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

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, 2014	274	$ 18.56
	Granted(1)	85	22.93
	Forfeited	(53)	18.57
	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

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