Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Bank Credit Facility — On January 25, 2021, the Company entered into an amended and restated credit agreement, which matures on November 15, 2025 (the “New Credit Facility”). Upon entry into the New Credit Facility, the Company obtained a $850,000 senior secured revolving facility and refinanced all indebtedness outstanding under its Credit Facility (see Note 10). Convertible Debt — On January 26, 2021, the Company completed an offering of $690,000 of 0.125% convertible senior notes due 2026 (the “2026 Notes”). Interest will accrue from January 26, 2021 and will be payable twice a year with the first payment due on July 15, 2021. The Company used $25,530 of the net proceeds from the sale of the 2026 Notes to pay the cost of the capped call transactions described further below and approximately $250,500 to repay outstanding indebtedness under the Credit Facility and to pay related fees and expenses. The Company intends to use the remainder of the net proceeds from the sale of the 2026 Notes for general corporate purposes, which may include funding future acquisitions. The Company may apply all or a portion of the net proceeds for the acquisition of businesses, software solutions, and technologies that the Company believes are complementary to its own, although the Company has no agreements, commitments, or understandings with respect to any specific material acquisition at this time. The Company has not allocated any specific portion of the net proceeds to any particular purpose and its management will have the discretion to allocate the proceeds as it determines. The Company incurred $18,030 of expenses in connection with the 2026 Notes offering consisting of the payment of underwriting discounts and commissions, professional fees, and other expenses. Noteholders may convert all or a portion of their 2026 Notes at their option only in the following circumstances: (1) during any calendar quarter (and only during such quarter) commencing after the calendar quarter ending on June 30, 2021, if the last reported sale price per share of the Company’s Class B Common Stock exceeds 130% of the conversion price for each of at least 20 trading days, whether or not consecutive, during the 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter; (2) during the five consecutive business days immediately after any ten consecutive trading day period (such ten consecutive trading day period, the “measurement period”) in which the trading price per $1 principal amount of 2026 Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price per share of the Company’s Class B Common Stock on such trading day and the conversion rate on such trading day; (3) upon the occurrence of certain corporate events or distributions on the Company’s Class B Common Stock, as described in the offering memorandum; (4) if the Company calls the 2026 Notes for redemption; and (5) at any time from, and including, October 15, 2025 until the close of business on the second scheduled trading day immediately before the maturity date. The Company will settle conversions by paying or delivering, as applicable, cash, shares of the Company’s Class B Common Stock or a combination of cash and shares of the Company’s Class B Common Stock, at the Company’s election, based on the applicable conversion rate. The initial conversion rate is 15.5925 shares of the Company’s Class B Common Stock per $1 principal amount of 2026 Notes, which represents an initial conversion price of approximately $64.13 per share, and is subject to adjustment as described in the offering memorandum. If a “make-whole fundamental change” (as defined in the offering memorandum) occurs, then the Company will, in certain circumstances, increase the conversion rate for a specified period of time. The 2026 Notes will be redeemable, in whole or in part, at the Company’s option at any time, and from time to time, on or after January 20, 2024 and on or before the 40th scheduled trading day immediately before the maturity date, at a cash redemption price equal to the principal amount of the 2026 Notes to be redeemed, plus accrued and unpaid interest, if any, but only if the last reported sale price per share of the Company’s Class B Common Stock exceeds 130% of the conversion price on (1) each of at least 20 trading days, whether or not consecutive, during the 30 consecutive trading days ending on, and including, the trading day immediately before the date the Company’s sends the related redemption notice; and (2) the trading day immediately before the date the Company sends such notice. In addition, calling any 2026 Note for redemption will constitute a make‑whole fundamental change with respect to that 2026 Note, in which case the conversion rate applicable to the conversion of that 2026 Note will be increased in certain circumstances if it is converted after it is called for redemption and prior to the close of business on the second business day immediately before the related redemption date. In connection with the pricing of the 2026 Notes, the Company entered into capped call transactions with certain of the initial purchasers or their respective affiliates and certain other financial institutions (the “option counterparties”). The capped call transactions are expected generally to reduce potential dilution to the Company’s Class B Common Stock upon any conversion of 2026 Notes and/or offset any cash payments the Company is required to make in excess of the principal amount of converted notes, as the case may be, with such reduction and/or offset subject to a cap. The cap price of the capped call transactions will initially be $72.9795 per share, which represents a premium of 65% above the last reported sale price per share of the Company’s Class B Common Stock on the Nasdaq Global Select Market on January 21, 2021 and is subject to customary adjustments under the terms of the capped call transactions.