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Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Stockholders' Equity Note [Abstract]

Schedule of common and preferred stock activity

The Common and Preferred Stock Activity table below contains additional information about preferred stock conversions during 2020, 2019 and 2018:


Common and Preferred Stock Activity:			Preferred Stock						Common stock
(in shares)			Series A Convertible						Treasury						Outstanding
Balance as of December 31, 2017			74,364						7,186,521						87,544,777
Repurchase of common stock			—						—						—
Conversion of convertible preferred stock			(2,397)						—						239,748
Issuance for share-based compensation plans			—						—						318,915
Balance as of December 31, 2018			71,967						7,186,521						88,103,440
Repurchase of common stock			—						—						—
Conversion of convertible preferred stock			(4,644)						—						464,431
Issuance for share-based compensation plans			—						—						617,790
Balance as of December 31, 2019			67,323						7,186,521						89,185,661
Repurchase of common stock			—						—						—
Conversion of convertible preferred stock			(3,734)						—						373,416
Issuance for share-based compensation plans			—						—						496,720
Balance as of December 31, 2020			63,589						7,186,521						90,055,797