Operations and Significant Accounting Policies (Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands			12 Months Ended
	Jun. 06, 2022	Jan. 29, 2019	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings per share:
Net income (loss)			$ 64,459	$ (80,582)	$ 62,542
Basic-weighted average shares outstanding (in shares)			30,668	30,040	29,162
Stock Compensation			727	0	1,275
Warrants			11	0	506
Convertible notes			142	0	1,273
Diluted-weighted average shares outstanding (in shares)			31,548	30,040	32,216
Basic EPS (in dollars per share)			$ 2.10	$ (2.68)	$ 2.14
Diluted EPS (in dollars per share)			$ 2.04	$ (2.68)	$ 1.94
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			1,700	0	600
Operations and Significant Accounting Policies [Line Items]
Payments to redeem convertible notes			$ 0	$ 275,000	$ 0
2.625 Percent Convertible Notes Due 2024 | Convertible Notes Payable
Operations and Significant Accounting Policies [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.625%
Payments to redeem convertible notes	$ 275,000
Debt Instrument, Face Amount	$ 70,000	$ 345,000
Debt Instrument, Convertible, Conversion Price		$ 88.80
2.250 Percent Convertible Notes Due 2027 | Convertible Notes Payable
Operations and Significant Accounting Policies [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.25%
Debt Instrument, Face Amount	$ 800,000
Debt Instrument, Convertible, Conversion Price	$ 145.33
Warrant | 2.625 Percent Convertible Notes Due 2024 | Convertible Notes Payable
Operations and Significant Accounting Policies [Line Items]
Option Indexed to Issuer's Equity, Strike Price		114.92
Warrant | 2.250 Percent Convertible Notes Due 2027 | Convertible Notes Payable
Operations and Significant Accounting Policies [Line Items]
Option Indexed to Issuer's Equity, Strike Price	251.53
Hedge Transaction | 2.625 Percent Convertible Notes Due 2024 | Convertible Notes Payable
Operations and Significant Accounting Policies [Line Items]
Option Indexed to Issuer's Equity, Strike Price		$ 114.92
Hedge Transaction | 2.250 Percent Convertible Notes Due 2027 | Convertible Notes Payable
Operations and Significant Accounting Policies [Line Items]
Option Indexed to Issuer's Equity, Strike Price	$ 251.53