Long Term Debt (Narrative) (Details) $ / shares in Units, shares in Millions			12 Months Ended
	Jun. 06, 2022 USD ($) $ / shares shares	Jan. 29, 2019 USD ($) $ / shares	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jul. 16, 2021 USD ($)
Debt Instrument [Line Items]
Repayments of Senior Debt			$ 92,981,000	$ 66,654,000	$ 13,250,000
Write off of Deferred Debt Issuance Cost			3,426,000	899,000	0
Payments to redeem convertible notes			275,000,000	0	0
Loss on convertible notes conversion premium			103,125,000	0	0
Amortization of Debt Discount			0	10,217,000	9,692,000
Fair Value of Convertible Notes Hedges and Warrants Net	$ 22,200,000
Loss on convertible notes hedge transactions settlement			5,460,000	0	0
Net Proceeds From the Settlement of Convertible Note Hedge Transactions and Warrants	16,700,000
Payments for Convertible Notes Hedges	187,600,000
Purchases of Convertible Notes Hedges, Net of Tax	142,100,000
Proceeds from Issuance of Warrants	72,000,000		72,000,000	0	0
Other Expense [Member]
Debt Instrument [Line Items]
Write off of Deferred Debt Issuance Cost and Third Party Fees				1,100,000
Loss on convertible notes hedge transactions settlement			5,500,000
Revolving Line of Credit [Member]
Debt Instrument [Line Items]
Long-term debt outstanding			70,000,000	140,000,000
Line of credit facility, available borrowing capacity			513,200,000
Revolving Line of Credit [Member] | Amended and Restated Senior Credit Agreement [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity						$ 585,000,000
Letters of Credit [Member]
Debt Instrument [Line Items]
Letters of credit outstanding			1,800,000
Convertible Notes Payable [Member] | 2.625 Percent Convertible Notes Due 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	70,000,000	$ 345,000,000
Write off of Deferred Debt Issuance Cost			2,900,000
Effective Interest Rate (percent)		6.14%
Interest Expense, Debt			4,800,000	9,100,000	9,100,000
Debt Instrument, Fair Value Disclosure			79,000,000
Debt Instrument, Interest Rate, Stated Percentage		2.625%
Debt Instrument, Convertible, Conversion Ratio		11.2608
Debt Instrument, Convertible, Conversion Price | $ / shares		$ 88.80
Payments to redeem convertible notes	$ 275,000,000
Debt Conversion, Converted Instrument, Shares Issued | shares	0.9
Loss on convertible notes conversion premium			103,100,000
Convertible Debt			69,568,000	317,896,000
Debt Instrument, Convertible, Gross Amount of Equity Component		$ 51,600,000
Debt Instrument, Convertible, Carrying Amount of Equity Component		$ 39,100,000
Amortization of Debt Discount				10,200,000	$ 9,700,000
Convertible Notes Payable [Member] | 2.625 Percent Convertible Notes Due 2024 [Member] | Warrant
Debt Instrument [Line Items]
Option Indexed to Issuer's Equity, Strike Price | $ / shares		$ 114.92
Convertible Notes Payable [Member] | 2.250 Percent Convertible Notes Due 2027
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 800,000,000
Interest Expense, Debt			10,300,000
Debt Instrument, Fair Value Disclosure			731,000,000
Debt Instrument, Interest Rate, Stated Percentage	2.25%
Debt Instrument, Convertible, Conversion Ratio	6.8810
Debt Instrument, Convertible, Conversion Price | $ / shares	$ 145.33
Convertible Debt			$ 781,166,000	0
Convertible Notes Payable [Member] | 2.250 Percent Convertible Notes Due 2027 | Warrant
Debt Instrument [Line Items]
Option Indexed to Issuer's Equity, Strike Price | $ / shares	$ 251.53
Long-term Debt [Member] | Amended and Restated Senior Credit Agreement [Member]
Debt Instrument [Line Items]
SOFR Interest Rate			4.323%
Effective Interest Rate (percent)			5.448%
Long-term Debt [Member] | Amended and Restated Senior Credit Agreement [Member] | Fed Funds Effective Rate Overnight Index Swap Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			0.50%
Long-term Debt [Member] | Amended and Restated Senior Credit Agreement [Member] | Secured Overnight Financing Rate
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			1.125%
Long-term Debt [Member] | Amended and Restated Senior Credit Agreement [Member] | Adjusted SOFR
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			1.00%
Term Loan Facility [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross			$ 134,600,000
Long-term debt outstanding			133,858,000	$ 226,196,000
Term Loan Facility [Member] | Amended and Restated Senior Credit Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount						$ 233,500,000
Repayments of Senior Debt			90,000,000
Write off of Deferred Debt Issuance Cost			$ 500,000
Call Option [Member] | Convertible Notes Payable [Member] | 2.625 Percent Convertible Notes Due 2024 [Member]
Debt Instrument [Line Items]
Hedge and warrant transactions, net cash paid		$ 21,000,000
Call Option [Member] | Convertible Notes Payable [Member] | 2.250 Percent Convertible Notes Due 2027
Debt Instrument [Line Items]
Hedge and Warrant Transactions, Net Cash Paid	$ 115,600,000