Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity (Narrative) (Details)

Shareholders' Equity (Narrative) (Details) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Subsequent Event [Line Items]    
Stock repurchase plan, authorized amount $ 1,500,000  
Aggregate shares repurchased under stock repurchase plan 26,900  
Stock repurchased to date, value $ 1,029,000  
Stock Repurchased During Period, Value 11,223 $ 132,889
Stock Repurchase Program, Remaining Authorized Repurchase Amount $ 471,000  
Shareholders' Equity
Since the inception of the Company's stock repurchase plan in 2004 through March 31, 2021, the Company's Board of Directors has authorized the repurchase of $1.5 billion of the Company's common stock. Shares of the Company's common stock may be purchased in the open market or through privately negotiated transactions, subject to market conditions, and generally settle subsequent to the trade date. The repurchase program does not obligate the Company to acquire any specific number of shares or to acquire shares over any specified period of time.
Under this program as of March 31, 2021, the Company had repurchased 26.9 million shares at an aggregate purchase price of $1,029.0 million and has $471.0 million remaining available. During the three months ended March 31, 2021, the Company purchased an aggregate of $11.2 million of the Company's common stock under this program.