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Stockholders' Equity	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Stockholders' Equity	16. Stockholders’ Equity Our board of directors is authorized, subject to any limitations imposed by law, without the approval of our stockholders, to issue a total of 25,000,000 shares of preferred stock, in one or more series, with each such series having rights and preferences including voting rights, dividend rights, conversion rights, redemption privileges and liquidation preferences, as our board of directors may determine. In October 2016, our board of directors authorized the company to repurchase up to an aggregate of $250.0 million of our Class A common stock over three years. No shares were repurchased during the years ended December 31, 2016 and 2017. During the year ended December 31, 2018, we spent $161.0 million to repurchase 3,980,656 shares of our Class A common stock with an average price paid per share of $40.43. During January 2019, under the October 2016 program, we spent $45.1 million to repurchase 1,144,449 shares of our Class A common stock with an average price paid per share of $39.38. In February 2019, our board of directors authorized a new program for the company to repurchase up to $300.0 million of our Class A common stock over three years, effective March 11, 2019. The previous program terminated upon the effectiveness of the new program. In both August and November 2019, our board of directors authorized an additional $100.0 million under our new program, bringing the total authorized amount under the new program to a total of $500.0 million. During the year ended December 31, 2019, under the March 2019 program, we spent $100.0 million to repurchase an additional 1,936,458 shares of our Class A common stock with an average price paid per share of $51.64. As of December 31, 2019, we had $400.0 million of capacity remaining under our current stock repurchase program.

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The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI http://asc.fasb.org/topic&trid=2208762

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