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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Number of treasury shares or units reissued. Excludes reissuance of shares or units in treasury for award under share-based payment arrangement.

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Basis and Summary of Significant Accounting Policies - Statements of Stockholders' Equity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Jan. 01, 2020	Jan. 01, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 1,737,259	$ 1,760,708
Cash Dividends	(2,700)	(2,363)
Stock-Based Compensation	5,878	7,050
Reissued Shares	(5,349)	(10,981)
Net (Loss) Earnings	(280,005)	56,078
Foreign Currency Translation Adjustment	(1,754)	424
Ending Balance	$ 1,446,614	$ 1,813,508
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance (in shares)	(24,034)	(23,568)
Beginning Balance	$ (627,940)	$ (567,847)
Reissued Shares (in shares)	368	493
Reissued Shares	$ 7,291	$ 4,264
Ending Balance (in shares)	(23,666)	(23,075)
Ending Balance	$ (620,649)	$ (563,583)
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	45,376	45,376
Ending Balance	45,376	45,376
Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	290,229	278,922
Stock-Based Compensation	5,878	7,050
Reissued Shares	(12,640)	(15,245)
Ending Balance	$ 283,467	$ 270,727
Retained Earnings
Dividends, per share (in dollars per share)	$ 0.04	$ 0.035
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 2,029,613	$ 2,005,344
Cash Dividends	(2,700)	(2,363)
Net (Loss) Earnings	(280,005)	56,078
Ending Balance	1,740,193	2,061,651
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(19)	(1,087)
Foreign Currency Translation Adjustment	(1,754)	424
Ending Balance	$ (1,773)	$ (663)
Accounting Standards Update 2016-13
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Opening Balance Sheet Adjustment - net of taxes			$ (6,715)
Accounting Standards Update 2016-13 \| Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Opening Balance Sheet Adjustment - net of taxes			$ (6,715)
Accounting Standards Update 2016-02
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Opening Balance Sheet Adjustment - net of taxes				$ 2,592
Accounting Standards Update 2016-02 \| Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Opening Balance Sheet Adjustment - net of taxes				$ 2,592