XML 77 R53.htm IDEA: XBRL DOCUMENT v3.19.3
Fair Value Measurements - Financial Instruments Not Required to be Measured at Fair Value (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Mar. 31, 2016
Nov. 30, 2014
1.750% Senior Notes        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Interest rate (as a percent) 1.75%   1.75%  
3.375% Senior Notes        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Interest rate (as a percent) 3.50%      
3.5% Senior Notes        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Interest rate (as a percent) 4.25%     3.50%
Carrying Value | Level 2        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Marketable securities, current $ 47,873 $ 214,828    
Carrying Value | Level 2 | 1.750% Senior Notes        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Debt 545,062 569,372    
Carrying Value | Level 2 | 3.375% Senior Notes        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Debt 495,000 494,280    
Carrying Value | Level 2 | 3.5% Senior Notes        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Debt 594,345 593,871    
Carrying Value | Level 2 | Other borrowings        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Debt 47,737 30,929    
Carrying Value | Level 3        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Notes receivable, including noncurrent portion 38,906 32,645    
Fair Value | Level 2        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Marketable securities, current 47,873 214,828    
Fair Value | Level 2 | 1.750% Senior Notes        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Debt 557,378 589,864    
Fair Value | Level 2 | 3.375% Senior Notes        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Debt 499,815 484,790    
Fair Value | Level 2 | 3.5% Senior Notes        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Debt 604,038 583,200    
Fair Value | Level 2 | Other borrowings        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Debt 47,737 30,929    
Fair Value | Level 3        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Notes receivable, including noncurrent portion 38,906 32,645    
Cash | Carrying Value | Level 1        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Cash and cash equivalents 1,017,737 1,091,868    
Cash | Fair Value | Level 1        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Cash and cash equivalents 1,017,737 1,091,868    
Cash equivalents | Carrying Value | Level 2        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Cash and cash equivalents 787,367 672,878    
Cash equivalents | Fair Value | Level 2        
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis        
Cash and cash equivalents $ 787,367 $ 672,878