Quarterly report pursuant to Section 13 or 15(d)

Summary Of Significant Accounting Policies Summary of Adoption of New Accounting Pronouncements (Details)

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Summary Of Significant Accounting Policies Summary of Adoption of New Accounting Pronouncements (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Jun. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Operating Lease, Right-of-Use Asset $ 389,558   $ 352,679 $ 0 $ 0    
Prepaid expenses and other current assets 94,253     79,500 77,763    
Operating Lease, Liability, Current 62,756   57,207 0 0    
Deferred income taxes 80,193     78,155 68,913    
Total assets 2,751,080   2,721,400 2,368,721 2,299,339    
Accrued Liabilities, Current 279,932   272,338 275,684 255,682    
Operating Lease, Liability, Noncurrent 366,515   329,865 0 0    
Income taxes payable 13,653     22,763 8,247    
Total current liabilities 558,147   626,743 572,882 509,584    
Other Liabilities, Noncurrent 22,982   14,167 45,214 46,056    
Total liabilities 1,003,974   1,031,087 678,408 617,743    
Retained earnings 1,754,379     1,677,920 1,669,390    
Accumulated other comprehensive loss (7,273) $ (1,298)   (4,063) (4,235) $ (6,374) $ (8,887)
Total liabilities and equity $ 2,751,080   2,721,400 $ 2,368,721 $ 2,299,339    
Accounting Standards Update 2014-09 [Member]              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Operating Lease, Right-of-Use Asset     352,679        
Operating Lease, Liability, Current     57,207        
Total assets     352,679        
Accrued Liabilities, Current     (3,346)        
Operating Lease, Liability, Noncurrent     329,865        
Total current liabilities     53,861        
Other Liabilities, Noncurrent     (31,047)        
Total liabilities     352,679        
Total liabilities and equity     $ 352,679