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Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity

A summary of the stock option activity is presented below (in thousands, except per share amounts):

		Options Outstanding
		Number of Shares Subject to Options				Weighted Average Exercise Price Per Share				Weighted Average Remaining Contractual Life (in years)				Aggregate Intrinsic Value
Balance at December 31, 2017			1,172			$	24.06
Options granted			—			$	—
Options exercised			(427	)		$	18.75
Options canceled / forfeited / expired			(67	)		$	34.43
Balance at December 31, 2018			678			$	26.39
Options granted			—			$	—
Options exercised			(42	)		$	16.66
Options canceled / forfeited / expired			(31	)		$	33.61
Balance at December 31, 2019			605			$	26.68
Options granted			—			$	—
Options assumed			175			$	50.96
Options exercised			(7	)		$	13.47
Options canceled / forfeited / expired			(136	)		$	44.59
Balance at December 31, 2020			637			$	29.59				2.67			$	458
Vested and expected to vest at December 31, 2020			636								2.66			$	458
Exercisable at December 31, 2020			620								2.56			$	458

Summary of Stock Options Outstanding and Exercisable

The following table summarizes information about stock options outstanding and exercisable under all of the Company’s plans at December 31, 2020:

		Options Outstanding												Options Exercisable
Range of Exercise Prices per Share		Number Outstanding (in thousands)				Weighted Average Remaining Contractual Life (in years)				Weighted Average Exercise Price per Share				Number Exercisable (in thousands)				Weighted Average Exercise Price per Share
$12.52 - $19.24			113				2.63			$	18.06				113			$	18.06
$19.34 - $19.73			79				2.56			$	19.53				79			$	19.53
$20.21 - $21.30			82				2.84			$	20.68				82			$	20.67
$22.19 - $22.24			15				3.30			$	22.19				15			$	22.19
$22.45 - $22.45			70				6.79			$	22.45				53			$	22.45
$22.52 - $38.65			96				3.83			$	32.48				96			$	32.48
$43.54 - $43.63			6				0.57			$	43.56				6			$	43.56
$43.77 - $43.77			108				0.13			$	43.77				108			$	43.77
$45.90 - $54.60			45				0.73			$	51.35				45			$	51.35
$54.69 - $54.69			23				1.16			$	54.69				23			$	54.69
$12.52 - $54.69			637				2.67			$	29.59				620			$	29.80

Summary of Restricted Stock Awards and Units

Information with respect to outstanding restricted stock awards and units as of December 31, 2020 is as follows (in thousands, except per share amounts):

		Restricted Stock and Restricted Stock Units
		Number of Shares Subject to Time- based Vesting				Number of Shares Subject to Performance- based Vesting				Total Number of Shares				Weighted Average Grant Date Fair Value Per Share
Balance at December 31, 2017			2,014				1,119				3,133			$	33.35
Awards and units granted			1,087				44				1,131			$	21.85
Awards and units vested / earned			(695	)			(176	)			(871	)		$	34.84
Awards and units canceled / forfeited			(257	)			(230	)			(487	)		$	29.35
Balance at December 31, 2018			2,149				757				2,906			$	29.10
Awards and units granted			1,266				4				1,270			$	22.79
Awards and units vested / earned			(865	)			(118	)			(983	)		$	30.62
Awards and units canceled / forfeited			(179	)			(89	)			(268	)		$	27.53
Balance at December 31, 2019			2,371				554				2,925			$	25.99
Awards and units granted			3,331				994				4,325			$	14.64
Awards and units assumed			2,185				253				2,438			$	13.99
Awards converted			11				(11	)			—			$	22.45
Awards and units vested / earned			(1,676	)			(487	)			(2,163	)		$	21.12
Awards and units canceled / forfeited			(560	)			(242	)			(802	)		$	19.96
Balance at December 31, 2020			5,662				1,061				6,723			$	16.63

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Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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